Life history and potential new strategies for onion maggot (Diptera: Anthomyiidae) control in onion
Brian A. Nault, firstname.lastname@example.org, Cornell University, Entomology, NYS Agricultural Experiment Station, 630 West North Street, Geneva, NY
The onion maggot, Delia antiqua (Meigen), is a major pest of onion throughout most temperate onion-growing regions. Onion maggot larvae attack and kill onion seedlings if not controlled. Insecticide use continues to be the preferred method of control, but insecticide resistance in many populations to conventional products has made control more difficult. In the 1990s, a very successful alternative to conventional products was adopted – protecting seedlings by treating onion seed with cyromazine, an insect-growth regulator. However, in recent years, cyromazine has lost efficacy, perhaps due to resistance. This has prompted an effort to develop alternative management solutions. In New York, new tactics have been explored such as (1) using other novel insecticide seed treatments such as fipronil and spinosad to control maggots, (2) using a bait containing spinosad to control flies, and (3) delaying the time onions are planted to reduce the number of seedlings killed by maggots. Benefits and constraints of these new strategies will be discussed.
Species 1: Diptera Anthomyiidae Deliaantigua (onion maggot) Keywords: IPM