crop-chem-docs/corpus/epa_ppls/524-658.md

# MON 89034 x MON 88017 Sweet Corn

- EPA Reg No: **524-658**
- Registrant: BAYER CROPSCIENCE, LLC
- Signal word: Caution
- Active ingredients: Bacillus thuringiensis Cry3Bb1 protein and the genetic material necessary (vector ZMIR39) for its production in corn (0.007%); Bacillus thuringiensis Cry1A.105 protein and genetic material necessary (vector PV-ZMIR245) for its production in corn (0.0024%); Bacillus thuringiensis Cry2Ab2 protein and the genetic material necessary (vector PV-ZMIR245) for its production in corn (0.0057%)
- Label accepted: 2020-12-29
- Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/000524-00658-20201229.pdf

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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 
Washington, D.C. 20460 
OFFICE OF CHEMICAL SAFETY 
AND POLLUTION PREVENTION 
 
December 29, 2020 
 
 
David Chi 
Global Regulatory Manager 
Bayer U.S. – Crop Science 
d/b/a Monsanto Company 
700 Chesterfield Parkway West 
Chesterfield, MO 63017 
 
Subject: Non-Pesticide Registrati on Improvement Act (PRIA) Amendment – Extension of the expiration 
date for the registration for MON 89034 x MON 88017 Sweet Corn, modifications to the IRM 
compliance terms, and minor changes to the label including removing a secondary product name 
 EPA Registration Number: 524-658 
 Submission Date: March 18, 2020 
 OPP Decision Number: 561685 
 
Dear Mr. Chi: 
 
The amendment referenced above, submitted in connection with registration under the Federal Insecticide, 
Fungicide, and Rodenticide Act (FIFRA), is acceptable provided that you comply with the updated terms and 
conditions as described in this letter. 
 
1. The subject registration will automatically expire at midnight on December 31, 2025. 
 
2. The subject registration will be limited to Bacillus thuringiensis Cry1A.105 and Cry2Ab2 proteins and the 
genetic material necessary for their production (vector PV- ZMIR245) in MON 89034 corn (OECD 
Unique Identifier: MON-89034-3) and Bacillus thuringiensis Cry3Bb1 protein and the genetic material 
necessary for its production (vector PV-ZMIR39) in MON 88017 corn (OECD Unique Identifier: MON-
88Ø17-3) for use in sweet corn. 
 
3. Submit/cite all data required for registration of your product under FIFRA section 3(c)(5) when the 
Environmental Protection Agency (EPA) requires registrants of similar products to submit such data. 
 
4. This plant-incorporated protectant (PIP) may be combined through conventional breeding with other 
registered plant-incorporated protectants that are similarly approved for use in combination, through 
conventional breeding, with other registered plant-incorporated protectants to produce inbred corn lines 
and hybrid corn varieties with combined pesticidal traits. 
 
5. The subject registration is limited to a combined yearly total of 100,000 acres for commercial and 
breeding purposes, agronomic testing, and seed production in the United States and the Commonwealth of 
Puerto Rico. 
 
6. Monsanto must commit to do the following Insect Resistance Management (IRM) Program, consisting of 
the following elements:

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 Requirements (except for sweet corn home garden or educational use, i.e., marketed to home 
gardeners or educators for use on less than 20 acres) for Monsanto to prepare and require MON 
89034 x MON 88017 Sweet Corn users to sign “grower agreements,” that impose binding 
contractual obligations on the grower to comply with IRM requirements. 
 
 Requirements for Monsanto to develop, implement and report to EPA on programs to educate 
growers about IRM requirements. 
 
 Requirements for Monsanto to develop, implement and report to EPA on programs to evaluate 
and promote growers’ compliance with IRM requirements (except for sweet corn home garden or 
educational use, i.e., marketed to home gardeners or educators for use on less than 20 acres). 
 
 Requirements for Monsanto to develop, implement and report to EPA on programs to evaluate 
whether there are statistically significant changes in target insect susceptibility to Cry1A.105 and 
Cry2Ab2 proteins in the target insects. 
 
 Requirements for Monsanto to develop and, if triggered, to implement a “remedial action plan” 
that contains measures Monsanto would take in the event that any field relevant insect resistance 
to Cry1A.105 and/or Cry2Ab2 was detected as well as to report on activity under the plan to 
EPA. 
 
 Requirements for Monsanto to investigate reports of unexpected CRW damage to MON 89034 x 
MON 88017 Sweet Corn from growers (“performance inquiries”) and sample CRW to determine 
if the insects are resistant to Cry3Bb1. 
 
 Requirements for Monsanto to recommend CRW management options to growers in response to 
cases of unexpected CRW damage to MON 89034 x MON 88017 Sweet Corn. 
 
 Requirements regarding mitigation and notification actions that Monsanto would take in the 
event that a CRW population that meets EPA’s resistance criteria (as defined herein) is detected. 
 
 Requirements for Monsanto to maintain, and provide the Agency upon request, the number of 
units sold by state and county, IRM grower agreement results, and substantive changes to 
educational programs, for the previous growing season, within three months of the request. 
 
 Requirements for Monsanto, on or before August 31st of each year, to submit reports on 
Cry1A.105 and Cry2Ab2 resistance monitoring. 
 
a. Post-Harvest Requirements for MON 89034 x MON 88017 Sweet Corn 
 
Sweet corn is harvested long before field corn. Therefore, if the sweet corn stalks remaining in the field and 
any insects remaining in the stalks are destroyed shortly after harvest, a refuge is not needed as a part of the 
IRM program for sweet corn. Growers must adhere to the following types of crop destruction requirements 
as described in the grower guide/product use guide and/or in supplements to the grower guide/product use 
guide, and, in the case of home gardeners, on the seed packet, in seed catalogues, and on websites offering 
MON 89034 x MON 88017 Sweet Corn hybrids for sale to home gardeners.

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1) Crop destruction must occur no later than 30 days following harvest, but preferably within 14 
days. 
 
2) The allowed crop destruction methods are: rotary mowing, discing, or plow down or (for the 
home garden use) by chopping up the stalks using home garden tools such as a hoe. Crop 
destruction methods should destroy any surviving resistant insects. 
 
b. Grower Agreements for MON 89034 x MON 88017 Sweet Corn (except for sweet corn home 
garden use or educational use, i.e., marketed to home gardeners or educators for use on less than 
20 acres). 
 
1) Persons purchasing MON 89034 x MON 88017 Sweet Corn must sign a grower agreement. The term 
“grower agreement” refers to any grower purchase contract, license agreement, or similar legal 
document. 
 
2) The grower agreement and/or specific stewardship documents referenced in the grower agreement 
must clearly set forth the terms of the current IRM program. By signing the grower agreement, a 
grower must be contractually bound to comply with the requirements of the IRM program. 
 
3) Monsanto must continue to integrate this registration into the current system used for its other Bt 
corn plant-incorporated protectants, which is re asonably likely to assure that persons purchasing 
MON 89034 x MON 88017 Sweet Corn will affirm annually that they are contractually bound to 
comply with the requirements of the IRM program. 
 
4) Monsanto must use its current grower agreement for MON 89034 x MON 88017 Sweet Corn. If 
Monsanto wishes to change any part of the grower agreement or any specific stewardship 
documents referenced in the grower agreement that would affect either the content of the IRM 
program or the legal enforceability of the provisions of the agreement relating to the IRM program, 
thirty (30) days prior to implementing a proposed change, Monsanto must submit to EPA the text of 
such changes to ensure that it is consistent with the terms and conditions of this amended 
registration. 
 
5) Monsanto shall maintain records of all MON 89034 x MON 88017 Sweet Corn grower agreements 
for a period of three years from December 31st of the year in which the agreement was signed. 
 
6) Monsanto make available upon request records of the number of units of MON 89034 × MON 
88017 Sweet Corn seed sold or shipped and not returned, and the number of such units that were 
sold to persons who have signed grower agreements, for the previous growing season, within three 
months of the request. 
 
7) Monsanto must allow a review of the grower agreements and grower agreement records by EPA or 
by a State pesticide regulatory agency if the State agency can demonstrate that confidential 
business information, including names, personal information, and grower license number, will be 
protected. 
 
c. IRM Education and IRM Compliance Monitoring Program for MON 89034 MON 88017 Sweet 
Corn 
 
1) Monsanto must continue to implement and enhance (as set forth in paragraph 17 of this section) a

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comprehensive, ongoing IRM education program designed to convey to MON 89034 x MON 
88017 Sweet Corn users the importance of complying with the IRM program. The program shall 
involve at least one written communication annually to each MON 89034 x MON 88017 Sweet 
Corn user separate from the grower technical guide. The communication shall inform the user of 
the current IRM requirements. 
 
2) Annually, Monsanto shall revise, and expand as necessary, its education program to take into 
account the information collected through the compliance survey required under paragraph 6-9 of 
this section and from other sources. The changes shall address aspects of grower compliance that 
are not sufficiently high. 
 
3) Within three months of EPA request, Monsanto shall provide copies of the grower education 
materials and information on grower education activities including any substantive changes to these 
materials and activities. 
 
4) Monsanto must continue to implement and improve an ongoing IRM compliance assurance 
program designed to evaluate the extent to which growers purchasing MON 89034 x MON 88017 
Sweet Corn are complying with the IRM program and that takes such actions as are reasonably 
needed to assure that growers who have not complied with the program either do so in the future or 
lose their access to Monsanto’s corn PIP products (with exception of sweet corn home gardening or 
educational uses). Other required features of the program are described in paragraph 5-16. 
 
The following IRM Education and IRM Compliance Monitoring Programs (Paragraphs 5-16) apply 
to all sweet corn growers who plant more than 20 acres in a single growing season: 
 
 
5) The IRM compliance assurance program shall include an annual survey of all MON 89034 x MON 
88017 Sweet Corn customers who purchase 5 or more bags of MON 89017 x MON 88017 Sweet 
Corn. The survey would measure the degree of compliance with the IRM program, identify the 
response rate (e.g., the percent of MON 89034 x MON 88017 Sweet Corn acres covered by the 
responses), and consider the potential impact of non-response. An independent third party* will 
participate in the design and implementation of the survey. Data and information derived from the 
annual survey will be audited by an independent third party. 
 
 A third party is classified as a party other than the registrant, the grower, or anyone else with a 
direct interest in IRM compliance for Bt corn. 
 
6) The survey shall be designed to obtain grower feedback on the usefulness of specific educational 
tools and initiatives. 
 
7) Monsanto shall provide a written summary of the results of the prior year’s survey (together with a 
description of the methodology used and the supporting data) to EPA on or before January 31st of 
each year. Monsanto shall confer with EPA on changes to design and content of the survey prior to 
its implementation. 
 
8) Monsanto shall carry out a program for investigating legitimate “tips and complaints” that its 
growers are not in compliance with the IRM program. Whenever an investigation results in the 
identification of a grower who is not compliance with the IRM program, Monsanto shall take 
appropriate action, consistent with its “phased compliance approach.”

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9) Annually, Monsanto shall provide a report to EPA summarizing the activities carried out under 
their compliance assurance program for the prior year and the plans for the compliance assurance 
program during the current year. 
 
10) Monsanto and the seed corn dealers for Monsanto must allow a review of the compliance records 
by EPA or by a State pesticide regulatory agency if the State agency can demonstrate that 
confidential business information, including the names, personal information, and grower license 
number of the growers will be protected. 
 
d. Insect Resistance Monitoring and Mitigation for MON 89034 x MON 88017 Sweet Corn 
 
1) The Agency is imposing the following conditions for the Cry1A.105 and Cry2Ab2 toxins 
expressed in MON 89034 x MON 88017 Sweet Corn: 
 
i. Monsanto must monitor for resistance to Cry1A.105 and Cry2Ab2 expressed in MON 89034 x 
MON 88017 Sweet Corn. 
 
ii. The resistance monitoring program must include the following two approaches: (1) focused 
population sampling and laboratory testing and (2) investigation of reports of less-than expected 
control of labeled insects. Should field relevant resistance be confirmed, an appropriate resistance 
management action plan will be implemented. 
 
(a) Focused Population Sampling 
 
Monsanto must develop and ensure the implementation of a plan for resistance monitoring for Spodoptera 
frugiperda (fall armyworm or FAW) in counties in which MON 89034 and/or MON 89034 x MON 88017 
Sweet Corn acreage exceeds 5,000 acres and the pest is capable of overwintering in that county. Monsanto 
should consult with academic and United States Department of Agriculture (USDA) experts in developing 
the monitoring plan and will provide EPA with a copy of its proposed resistance monitoring plan for 
EPA’s approval prior to implementation. This proposed FAW monitoring plan must be submitted to EPA 
by January 31st of the year following that in which MON 89034 and/or MON 89034 x MON 88017 Sweet 
Corn acreage exceeds the trigger specified in this requirement (i.e., greater than 5,000 acres in any county 
in which FAW overwinters). The proposed plan must be implemented the season following the acreage 
trigger being met. The proposed plan will remain in place until an EPA approved plan can be 
implemented. 
 
Annually, Monsanto shall sample and bioassay populations of the key target pests: Ostrinia nubilalis 
(European corn borer; ECB), Diatraea grandiosella (Southwestern corn borer; SWCB), and Helicoverpa 
zea (corn earworm; CEW). Sampling for the target pests will be focused in areas identified as those with 
the highest risk of resistance development (e.g., where lepidopteran-active Bt hybrids are planted on a high 
proportion of the corn acres, and where the insect species are regarded as key pests of corn). Bioassay 
methods must be appropriate for the goal of detecting field-relevant shifts in population response to MON 
89034 x MON 88017 Sweet Corn and/or changes in resistance-allele frequency in response to the use of 
MON 89034 x MON 88017 Sweet Corn and, as far as possible, should be consistent across sampling years 
to enable comparisons with historical data. Each protein in MON 89034 must be tested separately, rather 
than a mixture of the two proteins, because resistance to one protein could be masked by the activity of the 
other.

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The number of populations to be collected shall reflect the regional importance of the insect species as a 
pest, and specific collection regions will be identified for each pest. For ECB, a minimum of 12 
populations across the sampling region will be targeted for collection at each annual sampling. For SWCB, 
the target will be a minimum of six populations. For CEW, the target will be a minimum of 10 
populations. Pest populations should be collected from multiple corn-growing states reflective of different 
geographies and agronomic conditions. To obtain sufficient sensitivity to detect resistance alleles before 
they become common enough to cause measurable field damage, each population collection shall attempt 
to target 400 insect genomes (egg masses, larvae, mated females, and/or mixed-sex adults), but a 
successful population collection will contain a minimum of 100 genomes. It is recognized that it may not 
be possible to collect the target number of insect populations or genomes due to factors such as natural 
fluctuations in pest density, environmental conditions, and area-wide pest suppression. 
 
The sampling program and geographic range of collections may be modified as appropriate based on 
changes in pest importance and for the adoption levels of MON 89034 x MON 88017 Sweet Corn. The 
Agency shall be consulted prior to the implementation of such modifications. 
 
Monsanto will report to the Agency, by August 31st of each year, the results of the population sampling 
and bioassay monitoring program. 
 
Any incidence of unusually low sensitivity to the Cry1A.105 and/or Cry2Ab2 proteins in bioassay shall be 
investigated as soon as possible to understand any field relevance of such a finding. Such investigations 
shall proceed in a stepwise manner until the field relevance can be either confirmed or refuted, and results 
of these shall be reported to the Agency annually before August 31st. The investigative steps will include: 
 
1. Re-test progeny of the collected population to determine whether the unusual bioassay 
response is reproducible and heritable. If it is not reproducible and heritable, no further action 
is required. 
 
2. If the unusual response is reproducible and heritable, progeny of insects that survive the diagnostic 
concentration will be tested using methods that are representative of exposure to MON 89034 x MON 
88017 Sweet Corn under field conditions. If progeny do not survive to adulthood, any suspected 
resistance is not field relevant and no further action is required. 
 
3. If insects survive steps 1 and 2, resistance is confirmed, and further steps will be taken to taken to 
evaluate the resistance. These steps may include: 
 
 Determining the nature of the resistance (i.e., recessive or dominant, and the level of functional 
dominance); 
 
 Estimating the resistance-allele frequency in the original population; 
 
 Determining whether the resistance-allele frequency is increasing by analyzing field collections 
in subsequent years sampled from the same site where the resistance allele(s) was originally 
collected; 
 
 Determining the geographic distribution of the resistance allele by analyzing field collections 
in subsequent years from sites surrounding the site where the resistance allele(s) was 
originally collected.

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Should field relevant resistance be confirmed, and the resistance appears to be increasing or spreading, 
Monsanto will consult with the Agency to develop and implement a case-specific resistance management 
action plan. 
 
(b) Investigation of Reports of Unexpected Levels of Damage by Lepidopteran Target Pests 
 
Monsanto will follow up on grower, extension specialist or consultant reports of unexpected levels of 
damage by the lepidopteran pests listed on the pesticide label. Monsanto will instruct its customers to 
contact them if such incidents occur. Monsanto will investigate all legitimate reports submitted to the 
company or the company's representatives. 
 
If reports of unexpected levels of damage lead to the suspicion of resistance in any of the key target 
pests (ECB, SWCB, CEW, and FAW), Monsanto will implement the actions described below, based on 
the following definitions of suspected resistance and confirmed resistance. 
 
Suspected resistance 
 
EPA defines suspected resistance to mean field reports of unexpected levels of insect feeding 
damage for which: 
 
 The corn in question has been confirmed to be lepidopteran-active Bt corn; 
 
 The seed used had the proper percentage of corn expressing Bt protein; 
 
 The relevant plant tissues are expressing the expected level of Bt protein; and 
 
 It has been ruled out that species not susceptible to the protein could be responsible for the damage, 
that no climatic or cultural reasons could be responsible for the damage, and that there could be no 
other reasonable causes for the damage. 
 
EPA does not interpret suspected resistance to mean grower reports of possible control failures or 
suspicious results from annual insect monitoring assays, nor does the Agency intend that extensive field 
studies and testing be undertaken to confirm scientifically the presence of insects resistant to MON 89034 
x MON 88017 Sweet Corn in commercial production fields before responsive measures are undertaken. 
 
If resistance is suspected, Monsanto will instruct growers to do the following: 
 
 Use alternative control measures in MON 89034 x MON 88017 Sweet Corn fields in the 
affected region to control the target pest during the immediate growing season. 
 
 Destroy MON 89034 x MON 88017 Sweet Corn crop residues in the affected region within one 
month after harvest with a technique appropriate for local production practices to minimize the 
possibility of resistant insects over-wintering and contributing to the next season’s target pest 
population. 
 
Additionally, if possible, and prior to the application of alternative control measures or destruction of crop 
residue, Monsanto will collect samples of the insect population in the affected fields for laboratory rearing

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and testing. Such rearing and testing shall be conducted as expeditiously as practical. 
 
Confirmed resistance 
 
EPA defines confirmed resistance to mean, in the case of field reports of unexpected levels of damage 
from the key target pests, that all the following criteria are met: 
 
 There is >30% insect survival and commensurate insect feeding in a bioassay, initiated with 
neonate larvae, that uses methods that are representative of exposure to Bt corn hybrids under field 
conditions (ECB and SWCB only). 
 
 In standardized laboratory bioassays using diagnostic concentrations of the Bt protein suited to the 
target pest in question, the pest exhibits resistance that has a genetic basis and the level of 
survivorship indicates that there may be a resistance-allele frequency of ≥ 0.1 in the sampled 
population. 
 
 In standardized laboratory bioassays, the LC50 exceeds the upper limit of the 95% confidence 
interval of the LC50 for susceptible populations surveyed both in the original baselines developed 
for this pest species and in previous years of field monitoring. 
 
(c) Response to Confirmed Resistance in a Lepidopteran Target Pest as the Cause of Unexpected 
Levels of Damage in the Field 
 
When field resistance is confirmed (as defined above), the following steps will be taken by Monsanto: 
 
 EPA will receive notification within 30 days of resistance confirmation; 
 
 Affected customers and extension agents will be notified about confirmed resistance within 30 days; 
 
 Monitoring will be increased in the affected area and local target pest populations will be sampled 
annually to determine the extent and impact of resistance; 
 
 If appropriate (depending on the resistant pest species, the extent of resistance, the timing of 
resistance, and the nature of resistance, and the availability of suitable alternative control measures), 
alternative control measures will be employed to reduce or control target pest populations in the 
affected area. Alternative control measures may include advising customers and extension agents in 
the affected area to incorporate crop residues into the soil following harvest to minimize the 
possibility of over-wintering insects, and/or applications of chemical insecticides; 
 
 Unless otherwise agreed with EPA, stop sale and distribution of the relevant lepidopteran-active Bt 
corn hybrids in the affected area immediately until an effective local mitigation plan approved by 
EPA has been implemented; 
 
 Monsanto will develop a case-specific resistance management action plan within 90 days according 
to the characteristics of the resistance event and local agronomic needs. Monsanto will consult with 
appropriate stakeholders in the development of the action plan, and the details of such a plan shall 
be approved by EPA prior to implementation;

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 Notify affected parties (e.g., growers, consultants, extension agents, seed distributors, university 
cooperators and state/federal authorities as appropriate) in the region of the resistance situation and 
approved action plan; and 
 
 In subsequent growing seasons, maintain sales suspension and alternative resistance management 
strategies in the affected region(s) for the Bt corn hybrids that are affected by the resistant population 
until an EPA-approved local resistance management plan is in place to mitigate the resistance. 
 
A report on results of resistance monitoring and investigations of damage reports must be submitted to the 
Agency annually by August 31st each year, for the duration of the registration. 
 
2) The Agency is imposing the following conditions for the Cry3Bb1 toxin expressed in MON 89034 x 
MON 88017 Sweet Corn: 
 
a) Investigation of Reports of Unexpected Levels of Damage (UXD) by Corn Rootworm (CRW): 
Performance Inquiries 
 
1) Monsanto is required to investigate "performance inquiries" (i.e., reports of unexpected corn 
rootworm damage to MON 89034 x MON 88017 Sweet Corn) from growers. Fields (defined as a 
tract separated by permanent boundaries such as fences, permanent waterways, woodlands, 
croplines not subject to change because of farming practices, or other similar features) with 
unexpected damage that meet both of the criteria below must be subjected to the follow-up actions 
in part 2) below: 
 
i. The affected plants are confirmed to be MON 89034 x MON 88017 Sweet Corn plants (take 
leaf samples to determine the presence of the CRW-active Bt protein); and 
ii. Corn rootworm feeding caused root damage with a Node Injury Score (NIS) > 1.0 on at 
least 50% of plants surveyed in a transect sampling of the damaged site(s) within the field. 
 
2) Follow-up actions (performance inquiries). For MON 89034 x MON 88017 Sweet Corn fields 
meeting the criteria in part 1) above, Monsanto must take the following actions: 
 
 Collect at least 250 (ideally 500 or more) CRW adult individuals from the damaged site 
within the field in question. Collections may be extended to the whole field, if necessary, 
to obtain sufficient CRW adult individuals. Collected populations must be subjected to the 
steps described for "investigation of populations of concern" in section (d)(2)(b) below. 
 
o If collections are unsuccessful, visit affected farm or field the following year (assuming 
the grower continues to be a customer and repurchases seed and does not rotate the field 
to a non-host crop) and attempt to collect corn rootworm adults. If beetles are not 
present the subsequent year, see section (d)(2)(b)(3)(c) below. 
 
 Review with the grower their CRW management practices and provide CRW management 
recommendations including an assessment of corn fields with similar trait(s) adjacent to the 
affected corn field that are managed by the same grower. 
 Use of single trait products containing the CRW trait in fields with unexpected damage in 
previous years should be discouraged. Recommended management options include, but are 
not limited to, the following:

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o Primary option: Rotation to non-host crop (e.g., soybean) 
 
o Secondary options: 
 
 Use of pyramided Bt corn products with multiple CRW PIP traits 
 Use of different single-CRW PIP traits (i.e., an alternative corn rootworm-active 
PIP) 
 Use of non-Bt or non-corn rootworm protected corn 
 
o Tertiary options: If additional pest management need is determined beyond 
the secondary options listed above, additional corn rootworm control tools 
(e.g., soil insecticides, seed-applied insecticides, chemigation) should be used. 
 
 If field(s) with UXD is/are planted to a non-host crop (e.g., soybean) the following year, 
then the area will be considered “mitigated” (as discussed in section (d)(2)(b)(3) below) 
even if subsequent bioassay results show that the population was resistant. No further 
action will be required by Monsanto for the UXD case. 
 
3) Monsanto must submit an annual report to EPA detailing activities related to investigations of 
unexpected damage (UXD). This report will include the information from the most recent and 
previous corn growing seasons: 
i. Information from the most recent season: 
 
 The number of UXD reports investigated. 
 Location (by county and state). 
 CRW sampling (number and location of populations collected). 
ii. Information from the previous season: 
 The final disposition of UXD fields from the previous season (i.e., the management 
practices employed in response to UXD if the grower continues to be a customer). 
 Results from bioassays conducted on CRW populations from UXD fields where 
the primary management option, rotation to non-host crop, was not used. 
iii. Grower information, such as farm addresses or other personally identifiable information, or 
other sensitive business/customer information must not be included in this report. This 
report must be submitted by November 30
th each year. 
 
b) Investigation of Populations of Concern 
1) Monsanto must conduct investigations of all CRW populations collected as part of the 
performance inquiry process in section (d)(2)(a) above. These investigations must include the use 
of an EPA-approved bioassay to determine if sampled CRW populations are resistant to Cry3Bb1. 
Acceptable assays must be able to function as diagnostic tools capable of distinguishing resistant 
populations from susceptible ones. Unless previously approved, Monsanto must consult with EPA 
on their bioassay prior to its use. 
 
2) A CRW population will be considered by EPA to be resistant to Cry3Bb1 if the following criteria 
are met and additional collections and testing are not deemed to be necessary (based on part 3) 
below):

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a. An initial performance inquiry investigation results in a finding of Unexpected Damage; and 
b. Where green tissues are available and if plants are unusually stressed due to agronomic and/or 
environmental factors, Bt protein levels in affected plants are found to be within the 
documented range for that hybrid (if data are available); and 
c. Either (A): On-plant bioassays of insect collections from the UXD fields result in the 
following two statistically relevant comparisons 
i. A statistically significant difference in measures of either mortality or sublethal 
effects (growth/development) between the field population and a relevant susceptible 
control population (i.e., one that responds as a typical susceptible field population) 
on Bt corn containing the single PIP and/or lack of a statistically significant 
difference in measures of mortality or sublethal effect between the field population 
and a resistant positive control population1; and 
ii. A lack of a statistically significant difference in the same measures of the field 
population raised on Bt corn containing the single PIP and non-Bt corn plants. 
 
Or (B): Sublethal seedling bioassay of insect collections from the UXD fields result in two 
statistically relevant comparisons 
i. A statistically significant difference in measures of sublethal effects 
(growth/development) for populations on Bt corn containing the single PIP 
(normalized using non-Bt) seedlings between the field population and a relevant 
susceptible control population where available or historical field populations and/or 
lack of a statistically significant difference in measures between the field population 
and a resistant positive control population1; and 
ii. A lack of a statistically significant difference in the same measures of the field 
population raised on Bt corn seedlings containing the single PIP and non-Bt corn 
seedlings. 
 
Or C): Diet-based bioassays of insect collections from the UXD fields result in two statistically 
relevant comparisons 
i. A statistically significant difference in measures of lethal or sublethal effects 
(growth/development) on diet containing the Bt protein (diagnostic concentration or 
concentration-response measures) between the field population and a relevant 
susceptible control population where available or historical field populations and/or 
lack of a statistically significant difference in measures between field population and 
a resistant positive control population1; and 
ii. Either a lack of a statistically significant difference in the same measures of the field 
population exposed to diet containing the Bt protein (diagnostic concentration) and 
diet not containing the Bt protein and/or lack of a statistically significant difference in 
measures between the field population and a resistant positive control population, or 
lack of a statistically significant concentration and/or lack of a statistically significant 
difference in concentration response between the field and a resistant positive control 
population1. 
 
1 If a resistant positive control population is not available or accessible, Monsanto must consult with EPA prior to initiating bioassays 
and work to develop an appropriate resistant positive control population.

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3) Mitigation, as detailed in section (d)(2)(c) below, is required for any CRW population that meets 
EPA’s resistance criteria above, unless the circumstances described below are applicable. 
 
a. To minimize the potential for incorrectly reaching a conclusion of resistance, another year of 
CRW adult collections and additional testing is needed to determine resistance if: 
 
i. The results of the bioassays are inconclusive (e.g., the results of the statistical analysis 
are unclear because of low sample sizes) or 
ii. Another reasonable explanation for the unexpected damage exists (e.g., high pest 
pressure and/or high plant stress). 
 
b. In these cases, Monsanto and EPA will discuss and align on next steps before reaching 
any resistance conclusion. 
c. If CRW collections are not possible in the current year or subsequent year due to successful 
management practices, then no further investigation is needed. The population would be 
considered "mitigated" meaning, in this case, that the population is suppressed or extirpated 
for the UXD field. However, EPA recommends that Monsanto continue to be vigilant in 
areas where CRW populations were successfully mitigated. 
d. If a UXD field receives non-host crop (e.g., soybean) rotation the following year as described 
in Section (d)(2)(a)(2) above, no additional mitigation is subsequently required. 
 
c) Mitigation of CRW Populations Meeting EPA’s Resistance Criteria 
 
1) For any CRW population found to be resistant under EPA’s criteria described in section (d)(2)(b) 
above, Monsanto must take the following steps: 
 
a. Monsanto must inform EPA of the results of the bioassays as soon as possible, but at least 
within 30 days if measures are triggered. 
b. The mitigation action area (MAA) is defined as the growers’ farming operation up to a ½ 
mile radius from the damaged site that produced the resistant population. 
c. Within 30 days of informing EPA of the results of the bioassays, Monsanto must notify 
state extension agents and crop consultants who operate within the county in which 
resistance was identified. Information shared must include identification of the county in 
which resistance was detected and trait(s) affected. 
d. Within the MAA, Monsanto must do the following: 
i. Prior to finalizing the grower’s seed order for the following season, inform the affected 
grower and other registrants that hold registrations containing the compromised trait. 
Monsanto must also inform neighboring growers if those growers are customers of 
Monsanto. Information shared must include identification of the county in which 
resistance was detected and trait(s) affected; 
ii. Discontinue sales/planting of single trait product containing the compromised trait 
until resistance has been demonstrated to have been mitigated; 
iii. Monsanto must monitor the resistant population in the MAA, as long as grower 
remains a customer of the company, until mitigation has been demonstrated as 
described in part e below unless otherwise agreed with EPA.

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iv. Require any pyramids sold by Monsanto containing the compromised trait be planted 
with a 20% refuge until resistance has been demonstrated to have been mitigated. 
Other Bt corn registrants selling pyramided products in the MAA are encouraged, but 
cannot be required by this term of registration, to follow suit; 
v. For Monsanto’s affected customer’s field(s), the mitigation goal is to control the 
resistant CRW population. Within the MAA Monsanto shall encourage the use of 
“Mitigation Practices” including: 
 
1. Primary option: Rotation to a non-host crop (e.g., soybean); 
 
2. Secondary options: 
 
a. Use of pyramided Bt corn products with multiple CRW PIP traits; 
b. Use of different single-CRW PIP traits (i.e., an alternative corn rootworm- 
active PIP); 
c. Use of non-Bt corn or non-corn rootworm protected corn (with/without 
soil-applied insecticide); 
 
3. Tertiary options: 
 
a. If additional pest management need is determined beyond the secondary 
options listed above, additional corn rootworm control tools (e.g., soil 
insecticides, seed-applied insecticides, chemigation) should be used. 
b. Use of foliar applications to control adults (when appropriate economic 
thresholds have been met) may be used in conjunction with one or more of 
the above; 
e. A resistant CRW population in the MAA will be considered mitigated if one of the following 
criteria is met: 
 
i. Corn fields within the MAA are rotated to a non-host crop (e.g. soybean) for one 
growing season. 
ii. After implementation of mitigation practices (part d.v above), resistance monitoring 
(sampling) is conducted but few CRW are found (i.e., <0.1 adults per plant) and 
environmental conditions (e.g., weather) are unlikely to be responsible for the lack 
of adult CRW presence. If environmental conditions are a factor, then monitoring 
should continue for another season. 
iii. After implementation practices (part d.v above), resistance monitoring (sampling) is 
conducted, CRW are found and collected, and bioassays (section (d)(2)(b) above)
 
show that the population susceptibility to the compromised trait has returned to 
baseline levels. 
f. The mitigation actions in part d above can be lifted, and growers can resume the use of 
MON 89034 x MON 88017 Sweet Corn as a primary tool for CRW management in the 
MAA, only when Monsanto demonstrates that successful mitigation as described in part e 
above has been achieved. 
 
2) Based on further research to understand CRW resistance to Bt PIPs, EPA will consider

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refinements to the resistance mitigation program. Such research may include characterizing the 
genetics of resistance (e.g., number of genes, functional dominance, mechanism of resistance, and 
cross- resistance) and the biology of resistant insects (e.g., fitness in the presence and absence of 
the product), and other control tactics. 
 
e. Annual Reporting Requirements for MON 89034 x MON 88017 Sweet Corn 
 
The following annual reports must be submitted: 
 
1) Compliance Assurance Plan: Compliance Assurance Program activities, including IRM Grower 
Survey and on-farm assessment results as required by this registration, for the previous year and 
plans for the compliance assurance program during the current year, on or before January 31st of each 
year. 
 
2) Insect Resistance Monitoring Results (Cry1A.105 and Cry2Ab2 only): Results of monitoring and 
investigations of damage reports as required by this registration, on or before August 31st each 
year. 
 
3) Unexpected Damage Investigations (Cry3Bb1 only): Activities related to investigations of unexpected 
damage (UXD), including number and location of UXD cases, insect sampling, bioassays, and final 
disposition of UXD fields from the most recent and previous corn growing seasons, on or before 
November 30th of each year. 
 
Should you wish to add/retain a reference to your company’s website on your label, then please be aware 
that the website becomes labeling under FIFRA and is subject to review by the EPA. If the website is false 
or misleading, the product will be considered to be misbranded and sale or distribution of the product is 
unlawful under FIFRA section 12(a)(1)(E). 40 CFR § 156.10(a)(5) lists examples of statements the EPA 
may consider false or misleading. In addition, regardless of whether a website is referenced on your 
product’s label, claims made on the website may not substantially differ from those claims approved 
through the registration process. Therefore, should the EPA find or if it is brought to our attention that a 
website contains false or misleading statements or claims substantially differing from the EPA-approved 
registration, the website will be referred to the EPA’s Office of Enforcement and Compliance Assurance. 
 
Your release for shipment of this product constitutes acceptance of these conditions. If these conditions are 
not complied with, the EPA will consider appropriate regulatory action including, among other things, 
cancellation under FIFRA section 6(e). 
 
Your release for shipment of this product constitutes acceptance of these conditions. If you fail to satisfy 
these terms and conditions, the EPA will consider appropriate regulatory action including, among other 
things, cancellation under FIFRA section 6(e). 
 
A stamped copy of the label is enclosed for your records.

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OPP Decision No. 561685  
 
 
If you have any questions, please contact Matthew Weiner by phone at (703) 347-0333 or by email at 
weiner.matthew@epa.gov. 
 
 S i n c e r e l y , 
 
 
 Alan Reynolds, Team Leader 
 Emerging Technologies Branch 
Biopesticides and Pollution 
 Prevention Division (7511P) 
Office of Pesticide Programs 
 
 
Enclosure

Plant-Incorporated Protectant Label 
 
MON 89034 × MON 88017 sweet corn 
 
 
 
(OECD Unique Identifier: MON-89Ø34-3 × MON 88Ø17-3) 
 
Active Ingredients: 
Bacillus thuringiensis Cry1A.105 protein and the genetic mate rial necessary for its production 
(vector PV-ZMIR245) in MON 89034 × MON 88017 corn (OECD Unique Identifier: MON-
89Ø34-3 × MON-88Ø17-3) ........................................................................................... ≤ 0.0024%* 
 
Bacillus thuringiensis Cry2Ab2 protein and the genetic mate rial necessary for its production 
(vector PV-ZMIR245) in MON 89034 × MON 88017 corn (OECD Unique Identifier: MON-
89Ø34-3 × MON-88Ø17-3) ........................................................................................... ≤ 0.0057%* 
 
Bacillus thuringiensis Cry3Bb1 protein and the genetic material necessary for its production 
(vector PV-ZMIR39) in MON 89034 × MON 88017 corn (OECD Unique Identifier: MON-
89Ø34-3 × MON-88Ø17-3) .......................................................................................... ≤ 0.0070%* 
 
Other Ingredient: 
 
CP4 EPSPS protein (5-enolpyruvylshikimate-3 -phosphate synthase) and genetic material 
necessary for its production (vector PV-ZMIR39) in MON 89034 × MON 88017 corn (OECD 
Unique Identifier: MON-89Ø34-3 × MON-88Ø17-3) .................................................. ≤ 0.0069%* 
 
*Percentage (wt/wt) on a dry weight basis whole plant (forage) 
 
KEEP OUT OF REACH OF CHILDREN 
 
CAUTION 
 
EPA Registration No. 524-658 
EPA Establishment No. 524-MO-002 
 
Monsanto Company 
800 North Lindbergh Blvd. 
St Louis, MO 63167 
 
NET CONTENTS__________ 
 
 
 
 
 
12/29/2020
524-658

DIRECTIONS FOR USE 
 
It is a violation of Federal law to use this produ ct in any manner inconsistent with this labeling. 
Information regarding commercial production must be included in the Technology Use Guide and/or 
Insect Resistance Management (IRM) Guide. 
 
MON 89034 × MON 88017 sweet corn protects crops from leaf, stalk, and ear damage caused by corn 
borers and root damage caused by corn rootworm larvae. 
 
This plant-incorporated protectant (PIP) may be combined through conventional breeding with other 
registered plant-incorporated protectants that are similarly approved for use in combination, through 
conventional breeding, with other registered plant-incorporated protectants to produce inbred corn lines 
and hybrid corn varieties with combined pesticidal traits. 
 
Refuge requirements do not apply to this product. 
 
Post-Harvest Requirements for MON 89034 × MON 88017 sweet corn 
 
For MON 89034 × MON 88017 sweet corn, growers are required to destroy any 
MON 89034 × MON 88017 sweet corn stalks that remain in the field following harvest via rotary 
mowing, discing, or plow-down or (for home garden use) by chopping up the stalks using home garden 
tools such as a hoe within one (1) month of harvest, but preferably within 14 days. 
 
Corn Insects Controlled or Suppressed 
 
European corn borer Ostrinia nubilalis 
Southwestern corn borer Diatraea grandiosella 
Southern cornstalk borer Diatraea crambidoides 
Corn earworm Helicoverpa zea 
Fall armyworm Spodoptera frugiperda 
Stalk borer Papaipema nebris 
Lesser corn stalk borer Elasmopappus lignosellus 
Sugarcane borer Diatraea saccharalis 
 
Western corn rootworm Diabrotica virgifera virgifera 
Northern corn rootworm Diabrotica barberi 
Mexican corn rootworm Diabrotica virgifera zeae 
 
Sales of sweet corn hybrids that contain Monsanto’s Bt corn plant incorporated protectants must be 
accompanied by either a Technology Use Guide an d/or Grower Guide which includes information on 
planting, production and insect resistance management an d notes that routine applications of insecticides 
to control these insects are usually unnecessary when sweet corn containing the Bt proteins is planted. 
 
MON 89034 × MON 88017 is a product of Monsanto’s research program offering unique genetic 
characteristics for specific grower needs and may be protected by one or more U.S. patents found at 
http://www.monsantotechnology.com