Abstract
A larval bait trap was developed and evaluated as a sampling technique for Agrotis ipsilon (Hufnagel). The trap is a modified pitfall with five components: containers, lids, substrate, cylinders, and attractants (wheat seedlings and wheat bran). Black cutworms entered traps to feed; subsequent larval escape was minimal. Carabids which entered traps did not have an appreciable effect on cutworm recovery. The efficiency of traps placed in circular barriers for 3rd, 5th, and 6th instars was quantified so that traps could be used in conjunction with barriers to estimate densities of natural populations. The relationship between the numbers of 5th- and 6th-instar black cutworms captured in traps placed in field corn and the estimated cutworm density was determined. Traps were inefficient for early-instar larvae. Bait traps captured significantly more cutworms than sampling methods (bait stations and burlap traps) evaluated by other researchers.
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