However, you will need to request this from your seed supplier. Be prepared to treat susceptible varieties with a foliar insecticide if there are 6 or more beetles per 100 plants. A banded application just over the plants should work. Keep scouting even after a spray, to make sure more beetles do not move in. The overwintering adults will feed on weeds and move into corn plants throughout May and June.
Beetles tend to be more abundant on outer rows.
Scouting on calm, sunny days works best the beetles are most active then, and although they will jump away from you, it will be easier to spot them because of this activity. Although you should not overly rely on a systemic, data from Illinois suggest that Gaucho-treated seed can be a highly valuable component of management, with greater value on the more susceptible cultivar. And remember, if you are interested in Gaucho-treated sweet corn seed, you will need to request this from your seed dealer. Warning Pesticides are poisonous. Read and follow directions and safety precautions on labels.