True Armyworm and Black Cutworm Trap Report

, David Owens, Extension Entomologist,

Trap captures for black cutworm have increased considerably over last week. While this does not mean a given field will have a problem, it does indicate that there is risk for cutworm on further late terminated cover crops and provides us a good indicator of when to begin scouting for cutworm cutting.

True armyworm is generally low, except for northern Kent/southern New Castle County. Trap capture is high, and is in the range of Kentucky trap counts during their previous outbreak year. While this suggests that this area may be at risk for armyworm in wheat, armyworm has many other hosts and does not necessarily indicate a problem will develop. Further complicating management strategies is pre harvest interval. Most, but not all, pyrethroids have a 30 day pre harvest interval.



Location Number of Nights Total catch TAW Total Catch BCW
Willards, MD 7 2 60
Salisbury, MD 7 0 4
Laurel, DE 7 10 39
Seaford, DE 7 2 43
Sudlersville, MD 7 11 16
Harrington, DE 7 7 93
Smyrna, DE 6 621 83
Middletown, DE 7 103 56