crop-chem-docs/corpus/epa_ppls/352-382.md

DUPONT LEXONE 4L HERBICIDE

• EPA Reg No: 352-382
• Registrant: CORTEVA AGRISCIENCE, LLC
• Signal word: Caution
• Active ingredients: Metribuzin (42.1%)
• Label accepted: 1989-10-12
• Source PDF: https://www3.epa.gov/pesticides/chem_search/ppls/000352-00382-19891012.pdf

---

SUPPLEMENTAL lABELING EPA Reg. No. 352-382 LEXONE® 4L HERBICIDE DIRECTED POSTEMERGECE USE ON SOYBEANS It is a violation of federal law to use this product in a mannr inconsistent labeling. Du Pont Lexon(>~ 4L Herbicidf' is r(>commC'nded as a directed postemergellct.' trpatment of soybeans for control of certain annual wpeds. DJRECTIOSS FOR USE Apply when soybeans are at least 12 inches tall and whpn broadlpaf w('eds do no: exc(>ed 3 inchf's and grass('s and conunon ragwf'ed do not exceed 1 inch in ht>ight Direct spray to cover weeds with minimal or no contact to soybean plant. Cr()j' injury may rpsult if sprav is hif,I,,>r than 2 inches on soyb(>an sU·m. Al'l'lv 1/.' to 1 Pt. per aer£' in 25 to 40 "allons wat.er. Use thp low(>r rate for s('edl inr. wPC'ds and til(> higher rate for largC'r ... ('eds. Application of 1/2 Pt. p"r acr<' controls Florida bef,gan"'(,pd, carp£>tw('('d, common cocklebur, dayflo;h'l". M(':·:iC.l.Il w('(·d. l'('droot pigw(>(>d (can·lesswpped). common purslane. sicklepod (cassia). v('I'('(leaf. jimonswe('d, giant foxtail and crabgrass (1 a r£;(> , smooth); 3/!. to I Pt. !)(>r acre controls hemp s(·sbania. prickly sida (spiny sida. teaw(>('d.; 1 1': pf'r 1cr(' controls COfllmon rar,w('(>d and f,ivps partial control of morniuf, [,lory speci('s. horspnettl('. Florid3 purslanp (Florida pusley). spottpd spurr." ,lTld .... :iId poinsPttia whpn 1('55 than 3 inclws tall and hr:Jadl£"af sif,n.11f,1.1S U;l to irl(:ll tall. Do not us£' 011 sand, nor on soils witll 1£"55 thaTl 1/7% orfrlic m🇮🇹( as crop injury may r(';ult Add <1 non-ionic surfal:tant such iS Du Pont Surfilct.J.nt .:,.: or "('rtho" :-:-71 SpH-'ader to the spray mixtur£" to ohtain b(·ttf'r W't'ttinr, of W'(>(>d If'af surf.-If"{,s. If Il['('cipd, a second application mav ht, rr.-ide after! davs. Apply only with f'quipmf'nt df'sif.llPd for pr£"cisp applicatioll of dirt'ctf'd spra .. ·.'-, SIKh as oilinp, sho£'s or gauf,f' wh('els. Do not f"xc('('d nozzlf> prf'SS'l[f' of 7) p.<-,: or us(' no;:zl£' tips smallf'r than ROO? T-Jet (or p'luivalf>nt). For broadc,ist ilppl ieilt ion, us£' a singlE' floorl-typf' sprav nozzlp (nK" sf'ri('s or f'qui'.'aif·nt) p('r mirlrllf', mounted on <10 oiliTlf. shoe or gflur,p whf"pl. For hand trp.1tmfIlt. \I,' tW'o nozzlf's per row mountpd on oilinp, shops or F,R.up,e wh(,pls. OIH' nn ('deb sid.· of a row. Do not apply lIndpr wpatl"'r conditions which favor drift. fJ'.)3R; or,; lRR E I du Pont de Nemours & Co (Inc) • Agricultural Products Department. Wilmington. DE 19898

SUPPLEI1ENTAL LABELING EPA REG. NO. 352-382 i J U.,.,·r the r8dt'lff11l:1!5ertici i. • rIJ; • .:i··I·I'!. ".,d }-L"t"',l1 du J\ct 0.8 ',:: Jr., I t.,I til"" j..>"\1"I.j", "LEXONE" 4L HERBICIDE "i~';;_>::52~ ::;r:\ FOR USE ON WINTER WHEAT, BARLEY AND FALLOW DIRECTIONS FOR USE It is a violation of federal law to use this product in a manner inconsistent with its labeling. Du Pont "Lexone" 4L Herbicide is recommended for weed control: On the winter wheat varieties Eagle, Hawk, Larned, Newton, Pioneer 2157, TAM W101, TAM 105, and Wrangler in the states of Kansas, Oklahoma, and Texas. On winter wheat, winter barley, and spring barley (except varieties Morex, Glenn, or Moravian 3) in the states of Idaho, oregon, Utah, and Washington. In reduced tillage fallow where wheat will be the following crop. For use in the states of Colorado, Idaho, Kansas, Montana, Nebraska, North Dakota, Oklahoma, Oregon, South Dakota, Texas, Utah, Washington, and wyoming. Do not use this product through any type of irrigation system.

• 2 - Treatment controls or partially controls the following broadleaf weeds: Blue mustard l Bur buttercup Chickweed (common, mouse-ear, jagged) Conical catchfly Corn cockle Dog fennel (Mayweed) False flax Fanweed Filaree Flixweed l Gromwell l Henbit Jacobs ladder Jim Hill mustard Knotweed Kochia Lambsquarter Miners lettuce Pigweed (prostrate, redroot) Pineappleweed Prickl~ lettuce Russian thistle l Shepherdspurse Speedwell (ileaf) Tansy mustard Tarweed (Fiddleneck) Treacle mustard Wild buckwheat l Wild mustard Treatment cotrols or partially controls the following grasses: Annu31 ryegrasf (except Kansas, Oklahoma, Texas) Downy brome l ,2 Cheatgrass l ,2 Green foxtail l Pacific meadow foxtail (Blackgrass)l windgrass l Yellow foxtail l lWeeds and grasses partially controlled. Partial control is ~~ observable reduction in weed competition (reduced weed population ar.::/;:'l vigor) as compared to an untreated area. Degree of partial control can vary with soil type, environmental factors, and si~e of weeds at applicati on. 2Best results with late fall treatments.

• 3 - HOW TO USE ON DRYLAND WHEAT & BARLEY Apply postemergence to the crcp when wheat/barley is well tillered (at least 3 tillers) and has developed 2" secondary roots throughout the entire field. A well developd secondary root syste and good crop vigor is essential to minimize injury to wh~~t/barley. Application must be made prior to jointing as crop injury may result. For best weed control results: Apply "Lexone" 4L before broadleaf weeds emerge or shortly after emergence and before weeds are 2" taIlor across. Use a fall treatment for winter annuals or a spring treatment for summer annual b=oadleaf weeds. Avoid making treatments in mid-winter in areas where severe winter weather can cause crop stress. Apply "Lexone" 4L before grasses emerge or shortly after emergence and before the 3 to 5 leaf stage and use the higher dosage rates listed. Rainfall (1/2") within 2 to ) weeks after application is needed to move "Lexone" 4L into the weed root zone. Lack of adequate rainfall af .er application will result in poor control. USE RATES Make a single broadcast application postemergence to the crop as follows: Idaho. Oregon. Utah. and Wshington Pints of "Lexone" 4L Per Acre Soil Texture Coarse: Loamy sand, Sandy loam redium: Loam, Silt loam, Silt, Sandy clay, Sandy clay loam fine: Silty clay, Silty clay loam, Cl!y, Clay loam Less than 1% Organic Matter 0.50 to 0.60 0.50 to 0.60 0.50 to 0.75 1 to 2% Organic Matter 0.50 to 0.60 0.60 to 0.75 0.75 to 1.0 More than 2% Organic Matte]:, 0.50 to 0.60 0.60 to O.?() 0.75 to 1. (, Do not use on gravelly or thinly covered or exposed subsoil ar3C (clay knobs) as crop injury may occur.

---

• 4 - Kansas, O~lahcma, Texas

• , , Pints of "Lexone" 4L Per Acre Soil Texture Coarse: Loamy sand, Sandy loam Mdium: Loam, silt loam, Silt, Sandy clay, Sandy clay loam Fine: Silty clay, silty clay loam, Clay loam Fall Application 1 to 2% More than 2% Organic Orga~~c Matter Matter Do not use 0.50 to 0.75 0.75 0.50 0.75 0.75 to 1.0 1!P-ring 1 to 2% organic Matter Do not use 0.75 to 1.0 0.75 to 1.0 Application More than 2% Organic Matter 0.50 to 0.75 0.75 to 1.0 1.0 Do not use on gravelly or thinly covered or exposed subsoil areas (clay knobs) as crop injury may occur. Use the lower rates on coarse textured soils and the higher rates on medium or fine textured soils having more than 1% organic matter. For grass control, use the highest rate listed for your soil type. IRRIGATED WHEAT/BARLEY Rainfall or sprinkler irrigation is needed to activate "Lexone" 4L. If adequate rainfall (1/2" within 2 to 3 weeks after applicatior.) does not occur, then activate via sprinkler irrigation. Do not apply more than 1/2" of water for the first irrigation after applicaion. The maximum amount for each additional irrigation should not exceed I". 3PECIFIC HERBICIDE COMBINATION Winter Wheat, Sprinnd Winter Barley "Lexone" 4L may be tank mixed with "Igran" SOW for use on winte whebt and winter barley, Do not use more than 1.0 Ibs./acre "Igran" HOW ir tank mix. On winter wheat, spring barley, and winter barley, "i.,exone" tL may be tank mixed with "Glean", 2,4-0, "Banvel", MCPA, "Bronate", "Buctril", "Brominal Plus" or "Brominal", Refer to the other product labels registered for this use for additional precautions, diL~r.tions, rates, and weeds controlled.

• 5 - "Lexone" 4L and "Igran" SOW (Winter wheat. winter barley) - Pacific NW and utah For added control of downy brome, apply "Lexone" 4L at 0.50 pints per acre plus "Igran" SOW at 0.75 to 1. 00 pounds per acre. Follow "Lexone" 4L timing of application recommendation. Do not use on spL"ing barley or irrigated wheat/barley. Refer to "Igran" SOW label for additional precautions and instructions. How to Use for Reduced Tillaqe Fallow Apply 0.67 to 1.5 pints "Lexone" 4L per acre as an after harvest treatment prior to subsequent planting ~f winter wheat. Use the lower rate on coarse textured soils and the t.igher rate on medium to fine texture soil. "Lexone" 4L can be applied in the fall after harvest at 1.0 to 1.5 pts./acre or in the spring at 0.67 to 1.0 pts./acre as new weed growth begins. If large weeds (larger than 2" taIlor across) are present, or weeds other than those listed are present or anticipated, use a suitable registered companion herbicide such as "Glean", "Paraquat", or "Round-up". Refer 1:.0 labeling for these products for the additional use instructions and precautions. When using "Lexone" 4L and "Round-up" tank mix spray, volume should be 10 gpa. Where spring application is appropriate in Colorado, Kansas, Montana, Nebraska, North Dakota, Oklahoma, South Dakota, Texas, and Wyoming for improved control of downy brame, Russian thistle, and tansy mustard, tank mix 0.50 to 1.0 pints of "Lexone" 4L with 2 to 2.5 Ibs. "Igran" SOW per acre. Do not plant spring seeded cereals following "Lexone" 4L fall fallow applications. Do not apply "Lexone" 4L in the spring if "Lexone" 4L was used the preceding fall or winter. Recrop Intervals Do not plant winter wheat within 6 months of treatment except ~n Colorado, Kansas, Montana, Nebraska, North Dakota, Oklahoma, South Dakota, Texas, and Wyoming where winter wheat may be planted 4 months after treatment of 0.50 to 1.0 pints "Lexone" 4L per acre.

• 6 - Rotational Crop Interval Do not plant crops (other than wheat as listed above) within 10 months of treatment. SPRAY PREPARATION Mix the proper amount of "Lexone" 4L into the in the spray tank with the agitator running. fertilizer solutions should be added last. crop (as listed) necessary volume of water other herbicides or "Lexone" 4L may be mixed with liquid fertilizer. However, addition of liquid fertilizer to "Lexone" 4L alone or in a three-way tank mix with other herbicides increases the possibility of crop injury. Do not use surfactant when using "Lexone" 4L i)"l combination with liquid fertilizer. For application of "Lexone" 4L in liquid fertilizer, wherl"' the liquid fertilizer is the carrier, slurry the "Lexone" 4L in water, then thoroughly lnix the slurry into the liquid fertilizer. fallow "Lexone" 4L may be used in any combination listed above. When using tank mixes with "Lexone" 4L, small quantities should be tested for compatibility prior to use. The use of mixtures with "Lexone" 4L increases the possibilities cf injury or temporary yellowing to the crop, especially if 2" secondary roots are not developed throughout the field. APPLICATION Apply "Lexone" 4L using properl:r calibrated air or ground equipment. Uniorm coverage is essential in ordr to obtain optimum weed control performance and minimize the potential for crop injUry. Use a minimum spray volume of 3 gallons per acre by air or ground. As injury to crop may result, avoid overlapping of spray swath. Shut off spray booms while st:.:ting, turning, slowing I or stopping. C'mt.:i.rlUous agitation is needed to keep "Lexone" 4L in suspension.

• 7 - NOTE: Do not apply under conditions where excessive drift may occur. Do not apply "Lexone" 4L alone or in combination to stressed plants. Do not treat fielrls where seed had been planted less than 1" deep. Do not treat fields that have been severely grazed. Do not graze treated fields for 14 days following treatment. Do not apply more than once per crop or fallow period. Because spring barley varieties may vary in their tolerance to "Lexone" 4L. limit first use to a small area to determine varietal response prior to adoption as a field practice. Do not use on soils having a calcareous surface area or pH of 7.5 or higher as crop injury may result. Do not apply when soil is frozen or crop is in winter dormancy. Do not apply when soil is saturated with moisture. Temporary yellowing or injury of the crop may occur, especially if frost or snow occurs within a few days of application. Severe winter stress, heaving, exposed root systems, disease, or insect damage preceding or following application may increase crop injury. winter wheat/barley varieties differ in their degree of winter hardiness; severe injury ~ay result from treating non-winter hardy varieties that will not withstand the combination of winter and herbicide stress. If heavy rains occur soon after application, injlry to the crop may result. Extended dry weather following treatme,t may reduce weed control effectiveness.

• 8 - IMPORTANT BEFORE USING "LEXONE" 4L, "IGRAN" :JOW*, OR OTHER HERBICIDES IN COMBINATION, READ AND CAREFULLY OBSERVE THE CAUTIONARY STATEMENTS AND ALL OTHER INFORMATION ON THE PRODUCT LABEI,S. This bulletin c0ntains new or supplemental directions for use of these products which may not appear on the package labels. Follow the instructions carefully. This labeling must be in the possession of the user at the time of pesticide application. *Registered trademark of Ciba Geigy Corporation, "Igran" 80W contains terbutryn. E. I. du Pont de Nemours and Company Agricultural Products Department Wilmington, Delaware 19898 082185 082688