Abstract
Abstract The objective of this experiment was to evaluate the efficacy of Orthene 75 SP, Orthene 97 PE, and Admire 2°F as transplant water treatments against tobacco aphids in the field. Plots were established at the Central Crops Research Station, Clayton, NC, on 6 May in a field with a Norfolk loamy sand soil. Individual plots were 4 rows (1.14 m apart) wide by 22 plants (ca. 13.7 m) long and were arranged in RCB design with 4 treatments (untreated check included) and 4 blocks. On 6 May, the field was transplanted asing a 2-row transplanter. Transplant water treatments were applied at a rate of 170 gpa. Soil moisture was good. Once a week after transplant, all plants in one row of the plot (20) were rated for aphid abundance on a 0-7 scale as given in the table. Using this aphid abundance data, the average aphid rating \vas calculated. Aphid ratings were subjected to ANOVA and WD, K = 100, was used to separate treatment means.
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