Using insecticides at planting is a gamble. They can be expensive and some years they won’t pay off, but when they do pay off, they pay off big. Yield increases with the addition of in-furrow insecticides are a result of adding another level of protection and keeping plant healthier. Healthy plants with even emergence and growth from VE to V6 lay a foundation for high yield potential. Remember there is no rescue treatment from seed and root attacking insects such as corn rootworm and wireworms.
There are two options for insecticides applications at planting; seed treatment or in-furrow. Both have been proven to work well to control or reduce insect damage to the crop seed during early stages of growth. Similar to herbicides using a single mode of action year after year can cause resistances to the insecticide. You should at least switch modes of action or use multiple modes action per treatment.
Growers in a heavy insect pressure area or are not using Bt traited crops would be likely have the highest ROI on insecticide treatments. Becks 2015 practical farm research showed an average ROI of $15.74 in Ohio for in-furrow insecticide treatment in corn.
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