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Add ProHarvest Seeds: 119 varieties + 161 cross-vendor plot reports (#16 )

Co-authored-by: claude <claude@jpaul.io>
Co-committed-by: claude <claude@jpaul.io>

2026-06-04 21:05:30 -04:00

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81P19

Vendor: ProHarvest Seeds (independent regional brand)
Brand: ProHarvest Seeds
Crop: Corn
Relative maturity: 111 days
Trait(s): VT4Pro RIB Complete
Source: https://proharvestseeds.com/seed/81p19/
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)

General Characteristics

GDD Pollination: 1414
GDD Black Layer: 2692
Pollination for Maturity: Late
Plant Height: Medium-Tall
Leaf Type: Semi-Upright
Ear Height: Medium-High
Ear Type: Semi-Determinate
Kernel Rows: 16-18
Cob Color: Red
Test Weight: Good
Husk Coverage: Good
Covercrop Companion: Good

Agronomic Characteristics

Emergence: Good
Seedling Vigor: Good
Stay Green: Good
Dry Down: Good
Stress Tolerance: Very Good
Delayed Harvest: Very Good
Response to Fungicide: Excellent
Corn After Corn: Very Good
Silage: Very Good

Disease Ratings

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

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