Part 3 · Foliar Fungicide/Insecticide Field Trial · Corn2026 Local Research Results
Corn Field Trial: Both Hybrids with Fungicide/Insecticide Yielded 17–21 Bu/Ac More.
Foliar Fungicide/Insecticide vs. Non-Treated, Danforth S169: Revytek + bifenthrin applied July 15 on four 120-ft passes, vs. the next 480 ft. The planter alternated AgriGold 644-64VT2 and Hoegemeyer 8440V in 60-ft strips; each hybrid is compared with itself.
removed in cleanupfungicide/insecticide or strip-till areatrial-area boundarystraddling strips or border hybrid
Fungicide/insecticide 480 ft (shaded) and the next 480 ft non-treated. Colored points are combine passes fully inside one 644-64VT2 or 8440V strip, as planted. The as-applied file shows a second sprayed 240-ft block at the east edge of the non-treated strip, so the whole-strip row is not shown.
AgriGold 644-64VT2 · yield monitor| Area | Yield, bu/ac | Moist. | Acres | Points |
|---|---|---|---|---|
| Fungicide/insecticide · 480 ft | 258.8 | 18.9% | 4.5 | 2,473 |
| Non-treated · next 480 ft | 238.3 | 18.7% | 4.7 | 2,739 |
+20.5bu/ac
fungicide/insecticide − next 480 ft
Revenue difference
+$93/ac+20.5 bu × $4.55
Est. return after $35
+$58/ac644-64VT2 difference with a 30 / 60 / 90 ft edge buffer: +20.4 / +20.5 / +21.3 bu/ac
Hoegemeyer 8440V · yield monitor| Area | Yield, bu/ac | Moist. | Acres | Points |
|---|---|---|---|---|
| Fungicide/insecticide · 480 ft | 224.8 | 17.6% | 3.6 | 2,322 |
| Non-treated · next 480 ft | 207.8 | 18.0% | 2.5 | 1,813 |
+17.0bu/ac
fungicide/insecticide − next 480 ft
Revenue difference
+$77/ac+17.0 bu × $4.55
Est. return after $35
+$42/ac8440V difference with a 30 / 60 / 90 ft edge buffer: +16.9 / +17.0 / +17.4 bu/ac
Hybrids matched to the planting record. The combine logged every pass as 8440V, so each point was matched to the hybrid under the full 20-ft head (after a 3.5-ft GPS offset fix). Left out: 1,286 treated and 693 non-treated points straddling two strips or on border hybrids, and one non-treated 8440V pass that ran 24% below the other 8440V passes end to end at normal speed, as if 2 of 8 rows had already been cut by the second combine (kept in, 8440V would be +29.9).
| Data cleanup | In area | Used | Kept | Largest removals |
|---|---|---|---|---|
| Fungicide/insecticide 480 ft | 9,306 | 4,795 | 52% | other hybrid/variety or straddling 1,286, edge buffer 1,259, headland passes 847 |
| Next 480 ft | 10,940 | 4,552 | 42% | near sprayed ground 1,437, partial header 1,122, headland passes 837 |
Yield-monitor data cleaned the same way on both sides (bad points, headlands, turns and a 60-ft edge buffer removed); hybrids and varieties matched to the planting record. Est. return = difference × $4.55 − $35/ac.
Danforth Research Farm · 2026 Local Research Results
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