# 83P66

- **Vendor:** ProHarvest Seeds (independent regional brand)
- **Brand:** ProHarvest Seeds
- **Crop:** Corn
- **Relative maturity:** 113 days
- **Trait(s):** VT Double PRO RIB Complete
- **Source:** https://proharvestseeds.com/seed/83p66-2/
- **Rating scale:** disease 1-9, 9=best/most-tolerant, NA=not rated; agronomic/general qualitative (Excellent/Very Good/Good/Average); soil HR=highly recommended/R=recommended
- **Service area:** Independent dealer network — Eastern/Central Corn Belt (IL/IN/OH/MO/IA/KS/NE)

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## General Characteristics

- **GDD Pollination:** 1344
- **GDD Black Layer:** 2675
- **Pollination for Maturity:** Average
- **Plant Height:** Medium
- **Leaf Type:** Semi-Upright
- **Ear Height:** Medium
- **Ear Type:** Semi-Flex
- **Kernel Rows:** 18-20
- **Cob Color:** Red
- **Test Weight:** Good
- **Husk Coverage:** Good
- **Covercrop Companion:** Very Good

## Agronomic Characteristics

- **Yield for Maturity:** Excellent
- **Emergence:** Very Good
- **Seedling Vigor:** Very Good
- **Stalk Strength:** Very Good
- **Root Strength:** Very Good
- **Green Snap:** 6
- **Stay Green:** Very Good
- **Dry Down:** Good
- **Stress Tolerance:** Good
- **Delayed Harvest:** Good
- **Response to Fungicide:** Very Good
- **Corn After Corn:** Good
- **Silage:** Good

## Disease Ratings

- **Overall Disease Rating:** 8
- **Grey Leaf Spot:** 7
- **Northern Corn Leaf Blight:** 8
- **Southern Leaf Blight:** 8
- **Common Rust:** 8
- **Southern Rust:** 5
- **Eye Spot:** 8
- **Goss's Wilt:** 7
- **Stalk Anthracnose:** 9
- **Diplodia Ear Rot:** NA
- **Physoderma:** 6
- **Tar Spot:** 5

## Soil Adaptability

- **Light Soils:** HR
- **Medium Soils:** HR
- **Heavy Soils:** HR
- **Poorly Drained Soils:** R

## Nitrogen Application/Timing

- **Corn/SB 100% Pre:** R
- **Corn/SB Pre/Side:** HR
- **Corn/SB Starter/Side:** HR
- **Corn/Corn 100% Pre:** NR
- **Corn/Corn Pre/Side:** HR
- **Corn/Corn Starter/Side:** HR
- **Corn/Cover 100% Pre:** NR
- **Corn/Cover Pre/Side:** HR
- **Corn/Cover Starter/Side:** HR

## Recommended Seeding Rates

- **30" Low:** 28-30
- **30" Medium:** 29-31
- **30" High:** 32-34
- **Narrow Low:** 31-33
- **Narrow Medium:** 33-35
- **Narrow High:** 35-37