European Corn Borer Continues to Decline (08/05/21)
European corn borer (ECB) moths continue to decline. ECB Z-race moths (univoltine) were detected at 9 of the 13 of trap sites and ECB E-race (bivoltine) at 3 of the 13 trap sites last week (Table 1 on page 3). The ECB-Z and ECB-E-race moths peaked the week of July 2-8. The ECB-Z moths were 96% of the total trap catch last week, while ECB-E moths were only 4%. Corn crop stages were VT to R2.
Extension Crop Protection Specialist
NDSU North Central Research Extension Center