Wyffels Hybrids · Brand Blend
W4439RIB
We stock this hybrid; call for Wyffels' ratings and placement.
Placement
Widely adapted across soil types and productivity levels. Semi-flex ear adapts to a wide range of planting rates. Good north to south movement in our geography. Early to black layer for maturity.
Plant Physiology and Health
| Trait(s) | SmartStax® PRO |
|---|---|
| GDUs to Black Layer | E, 2550 |
| Days to Pollination | 75 |
| GDUs to Pollination | L, 1365 |
| Early Vigor | 8 |
| Early Canopy | |
| Plant Height | M |
| Stalk Strength | 7 |
| Root Strength | 8 |
| Green Snap Resistance | 8 |
| Drought Tolerance | 7 |
| Staygreen | 7 |
Placement Considerations
| Rimsulfuron Tolerance |
|---|
Ear/Grain Characteristics
| Ear Flex | SF |
|---|---|
| Ear Length | 8 |
| Ear Height | MH |
| Kernel Rows | 14-16 |
| Test Weight | 7 |
| Drydown | 7 |
Pest/Disease Ratings
| Goss’ Wilt Tolerance | 8 |
|---|---|
| Gray Leaf Spot Tolerance | 6 |
| NLB, Race 0, Tolerance | 6 |
| Stewarts Leaf Blight Tolerance | |
| Anthracnose Tolerance | 8 |
Silage · 2025
| Tons / acre | 35.5 |
|---|---|
| Dry matter % | 39.5 |
| Milk / ton | 3151.0 |
| Milk / acre | 44074.0 |
| Starch % | 43.7 |
| NDFD 30 | 47.1 |
| Crude protein % | 7.7 |
FORAGE TEST:Dairyland Lab. FORAGE SOURCE: Wyffels Research Micro-Strip Test Sites in Illinois and Iowa, 2025. Minimum of 12 replications per hybrid per year.