Control of the Cabbage Maggot, Hylemya brassicae, on Radish with Insecticides1

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Abstract
The principal insect species infesting radish in New York is the cabbage maggot, H. brassicae (Bouché). This species is effectively controlled through the application of aldrin or dieldrin as broadcast, furrow, or drench treatment, and has not developed a significant degree of resistance to these chemicals in New York. Parathion and diazinon were effective in drench and furrow treatments, but at the dosages tested, did not provide satisfactory control through broadcast application. Chemagro 25141 (O,O-diethyl O-p-(methylsulfinyl) phenyl phosphorothioate), Chemagro 37289 (O-ethyl O-2,4,5-trichlorophenyl ethylphosphonothioate), Stauffer N-2790 (O-ethyl-S-phenyl ethylphosphonodithioate), General Chemical GC-4072 (2-chloro-1-(2,4-dichlorophenyl)vinyl diethyl phosphate), and Nemacide® (O-(2,4-dichlorophenyl) O,O-diethyl phosphorothioate) provided good control when applied in the plant row. Zinophos (0,0-diethyl O-2-pyrazinyl phosphorothioate), dimethoate, and Di-Syston® (O,O-diethyl S-[2-(ethylthio)ethyl] phosphorodithioate) did not provide adequate control.