Abstract
Abstract Nine soil insecticides were applied at the full rate at planting time and at a reduced rate at first cultivation time at Concord, Nebr. The test plot was planted 25 Apr in a continuous corn field with a silty clay loam soil type. The experimental design was a randomized complete block with 4 replicates. Each treatment consisted of a single 35-ft-long row; rows were 30 inches apart. Insecticides were applied in a 7-inch band by a Noble granular metering unit mounted on a hand-powered bicycle applicator equipped with incorporation tines. Cultivation treatments were applied 31 May over the row and followed immediately by a tractor-mounted cultivator. No phytotoxicity was observed. Feeding damage was evaluated 6 Jul. Five roots were dug from each treatment row and rated by the Iowa 1-6 scale (1, no damage; 6, 3 or more nodes of roots completely destroyed).
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