Abstract
Abstract Insecticides were screened in randomized-complete block tests at 2 locations. The soil was mostly silty clay loam with a pH of approximately 7 and 5-8% organic matter. Plots consisted of six 100 ft rows, and were planted on May 4 and 11. Insecticides were applied to the 4 center rows at 3 mph. Treatments were made in the furrow, in 7 in . bands over the rows at planting, and in 7 in . bands over the rows at post (June 2 and 12) and late post (June 17 and 26) - fly emergence. Peak fly emergence occurred on June 13. All but the in furrow treatments were lightly incorporated into the soil with drag chains ( 1 3/4 in. links). Liquid materials were applied in 18 gals water/acre with 8002E nozzles at 40 psi. Weather conditions were generally favorable for good beet growth and insecticide application. Significant rain fell after the insecticides were applied. Data consisted of yields from 30 f t. from row 3 (from the left) in each plot at harvest. The data was transformed byX, and analyzed by analysis of variance and Duncan's new multiple range test. The functional maggot infestation (based on the amount damage to beets) in the plots indicates that there were sufficient maggots to provide satisfactory data. Damage in untreated beets was light to moderate. The ave damage rating was 2.45 on a scale of 1 (no damage) to 5 (severe damage).
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