Six seedling pests that don’t need seed treatments
5. Three-cornered alfalfa hoppers feed on seedling and are generally discovered after the fact, when plants lodge later in the season. Seed treatments and foliar pyrethroid sprays can effectively manage these insects. The problem is that it takes EXTREMELY high densities to impact yield. So your money is wasted 99.9% of the time targeting a seed treatment for these critters. In short, if you’ve had a problem with these in the past, do not waste your money with a seed treatment. Scout your beans and treat if you need to.
6. Finally, lesser cornstalk borer can give us problems, especially in late-planted soybeans, on droughty soils, and/or during hot and dry periods. Unfortunately we do not know of any remedial control measure (including pesticides) that is effective for this insect.
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