Abstract
Cutworms, primarily the white cutworm, Euxoa scandens (Riley) and the darksided cutworm, E. messoria (Harris), cause serious damage to asparagus in Michigan. Foliar insecticides, baits, and granular formulations of various insecticides were evaluated for their effects on cutworm mortality, survival, and subsequent damage when applied during harvest (spring) or in the fall. Spring applications of permethrin were most effective in reducing damage and survival during harvest. Fall bait or granular applications also effectively reduced survival and damage by white cutworms. Overwintering mortality of larvae was estimated as 86% in the absence of insecticide treatment. Analysis of spring treatment data showed that a larva damaged about 0.1 spears per night.
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