The Use and Benefits of Neonicotinoid and Diamide Seed Treatments on Soybean Compared to No Insecticide on Soybean in New York
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2024-12
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Fletcher, Cassidy P
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Neonicotinoids are pesticides that made their debut as a control method for pests in the agricultural industry. Since their efficacy as seed treatments was demonstrated, the use of neonicotinoids has rapidly grown. With the widespread use, there has also been increased concern for off-target insects. This scrutiny has put pressure on seed treatments and the place that neonicotinoids have in agriculture. This research compared seed-applied insecticides, namely neonicotinoid and diamides, with seed with no insecticide, hereon referred to as the check. The trials were planted at one location in New York, at a recommended planting date for soybean, and an earlier than recommended planting date, and were conducted over 2 years. Yield was greater on soybean treated with insecticide (neonicotinoid and diamide) when compared to the soybean with the check (no insecticide) (P<0.10). The benefit of the insecticide was not proven in both the early and recommended planting dates due to limited insect pressures. There was no effect of seed treatment on yield components (pods per plant, seeds per pod, and seeds per plant) in both years for both plantings. However, an effect of seed treatment on yield was detected in two of the four site years (P<0.10). Greater yields were measured in the neonicotinoid seed treatment than the diamide seed treatment and check in 2022 early planting and 2023 recommended planting (P=0.00899, P=0.0635 respectively). However, in the 2022 recommended planting date and 2023 early planting date, the insecticide treated soybean showed no effect on soybean yield. The use of neonicotinoid has the potential to increase yield in soybean planted in NY and the Northeastern United States. As planting dates continue to move earlier and soil conditions may not be ideal, neonicotinoids and diamide seed treatments will remain a viable option for seed and yield protection, but more information is needed to determine the effective timing and placement.
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2024