Onion Thrips Management Guidelines for Onion: Using Foliar-Applied Insecticides
Christy Hoepting, Extension Vegetable Specialist
Cornell Vegetable Program
The 2026 Onion Thrips Management Guidelines for Onion: Using Foliar-Applied Insecticide Products are designed to optimize onion thrips management in onion and to mitigate risk of insecticide resistance. Information herein is based on insecticide resistance management principles (IRAC: Insecticide Resistance Action Committee) and years of experience evaluating efficacy of insecticides used for managing onion thrips infestations in small-plot onion field trials in commercial fields, primarily in western New York. Other insecticides (generics and other active ingredients) are also available and may be effective against onion thrips and could be substituted for the products listed here. Information below provides context for these guidelines. These Guidelines do NOT consider managing onion thrips in order to reduce incidence of iris yellow spot virus.
