Effects of crop rotation, tillage, and weed management systems on black cutworm (Lepidoptera: Noctuidae) infestations in corn [following soybeans or wheat, Agrotis ipsilon]

Infestations of black cutworm, Agrotis ipsilon Hufnagel, in cornfields in Indiana, USA, were evaluated during 3 years under various crop rotation, tillage, and weed management systems. All three factors significantly influenced black cutworm infestations and damage (P = 0.05). Significant rotation x tillage, rotation x weed management, and tillage x weed management interactions were noted in at least 1 year. Corn following soybeans or wheat, reduced tillage, and the presence of weeds all contributed to black cutworm occurrence. Moldboard plowed plots had very little damage under any rotation.