![]() ![]() If controls are warranted, then insecticides for use against cutworms maybe found in ENT-13. If stand loss due to cutworms is found and live cutworms are still present, then estimate the percentage of stand loss in several areas of the field.Ĭontrol may be justified if 30% or more of the plants are lost or damaged and live cutworms are still present. Use a knife blade to sift through the soil. Then, dig up an area three inches in diameter and three inches deep around the plant. First, check under clods around the plant base. Look for live cutworms around damaged plants. Scouting is done only if plant with these symptoms are noticed. Look for stand reduction or wilted or cut plants when walking through the field. Symptoms are cut or wilted, or missing plants. Larger cutworms cut small plants and may pull parts of them into their burrow. They will be coiled in a compact "C" when uncovered.Ĭutworms are active at night, feeding first on leaves. Larvae vary from 1/4 inch long just after hatch to 1-1/4 to 1-3/4 inches long when full grown. The skin appears ‘greasy' and to contain tiny granules. Larvae (worms) are light gray to nearly black with a faint, narrow, stripe down the middle of the back. They are more likely to be found in fields with a history of cutworm damage, those planted under reduced or no-tillage practices, fair to poorly drained fields and / or ‘overflow' land, or fields covered with winter annual weeds prior to planting. Black cutworms may be found from plant emergence until late June. ![]() The most common species is the black cutworm. ![]() University of Kentucky College of AgricultureĬutworms are not serious pests in soybeans but occasionally can cause considerable stand loss in localized areas of a field. ENTFACT-132: Cutworms in Kentucky Soybean | Download PDF Agrotis sp. (Lepidoptera: Noctuidae) by Doug Johnson, Extension Entomologist ![]()
0 Comments
Leave a Reply. |