Abstract
Abstract A seedcorn maggot soil insecticide test plot was established in the Johnston Farm, 1 mile south of Ames, IA. The experimental design was a randomized complete block with 4 replications. Thirty ft seed furrows, spaced 40 in apart, were opened with modified cultivator sweeps. A meat and bone meal bait was placed in the furrow (1.5 qt/30 ft) and watered daily from Apr 28 to May 4. Corn was hand planted (6-in spacing) and insecticides were applied May 5. Granules were applied in the furrow or as a 7 in band with laboratory-calibrated Noble metering units mounted on a bicycle applicator. Liquids were banded with a self-contained small plot sprayer. All materials were manually incorporated by raking. Seedcorn maggot feeding was evaluated May 27-28, when plant emergence was complete. Two, 1-meter trenches 10-cm deep were dug in each treatment and the soil was examined for larvae, pupae, and damaged seeds. All seedcorn maggot larvae and pupae in each sample were recorded, percent damaged seeds was calculated, and a 1/1000 acre stand count was taken in each row.
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