University of Illinois

No. 6/May 2, 1997

Black Cutworm Migratory Surge Continues

Black cutworm moths poured into all regions of Illinois during the monitoring period of April 19 to 25. In total, cooperators in 35 counties reported moth captures in their pheromone traps. Intense captures (nine or more moths caught over a 1- to 2-day period) of moths occurred in Edwards, Macoupin, Wayne, and White counties on April 19 and in Crawford and Schuyler on April 21 and 24, respectively. Projected cutting dates, provided by Bob Scott, Illinois State Water Survey, for these most recent intense flights are as follows: Crawford (5/18), Edwards (5/18), Macoupin (5/20), Schuyler (5/21), Wayne (5/18), and White (5/16).

Projected cutting dates are provided in parentheses for the following counties that had reported intense captures for the week of April 12 to 18: Alexander (5/9), Clark (5/18), Franklin (5/15), Hancock (5/19), Macon (5/20), Monroe (5/13), Randolph (5/9), and Vermilion (5/22). These projected cutting dates are slightly more delayed than previously reported because they take into account the recent cool temperatures experienced across much of the state.

Our black cutworm monitoring program will remain in place for about one more month. During this period, we will continue to offer weekly reports of the black cutworm moth migration. We would certainly appreciate receiving any reports from our readership concerning black cutworm infestations that have developed in the state.

Mike Gray, Extension Entomology, (217)333-6652