Seedcorn Maggot: Seed Treatments and Granule Furrow Applications for Protecting Beans and Sweet Corn12

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Abstract
Field tests indicated that granular formulations of diazinon, carbofuran, chlorpyrifos, and Counter® (S-(tert-butylthio) methyl 0,0-diethyl phosphorodithioate), placed with beans in the seed furrow effectively controlled Hylemya platura (Meigen) without noticeable phytotoxicity. A narrow band of Counter over the seeds on the soil surface also reduced feeding damage, but other treatments of so placed were not effective. Slurry seed treatments of Primicid® (2-diethylamino-6-met hylpyrimidin-4-yl diethyl phosphorothionate), carbofuran, ehlorpyrifos, diazinon, and N-2596 S-(p-chlorophenyl)O-ethyl ethyl-phosphonodithioate), and diazinon planter box applications gave acceptable levels of control, although dieldrin slurries did not. Twelve-month germination tests in the greenhouse indicated no seedling phytotoxicity on corn or beans when slurry-treated with Primicid. Some evidence of germination reduction in the field was observed when limas were treated with chlorpyrifos combined with captan or thiram, but this did not occur with other crops. Less detectable maggot injury was found on peas and sweet corn than on beans.

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