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ARS Home » Research » Publications at this Location » Publication #102668
Title: A SUGAR ESTER (AVA CHEMICAL VENTURES, L.L. C.)AS A BIORATIONAL AGENT AGAINST THE SILVERLEAF WHITEFLY, BEMISIA ARGENTIFOLII, IN FIELD TRIALS IN UPLAND COTTON IN ARIZONA

Author
item Akey, David
item Henneberry, Thomas

Submitted to: Sweetpotato Whitefly Progress Review Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 5/1/1999
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Deltapine NuCOTN 33B was planted and furrow irrigated in plots 109 ft. in length and 12 rows across (40-in. rows). Plots were separated by 4 fallow rows and 20 ft alleys. A sugar ester (AVA Chemical Ventures, L. L. C.) was used at 0.2 and 0.3%wt/v gal/ac. Applications were made once the silverleaf whitefly reached the action threshold (Univ. AZ recommendations). This treatment was part of a 12-treatment random block design that included a þBest Agricultural Practice regimeþ (BAP), embedded controls, and a 1-ac block control. Eggs, small nymphs, and large nymphs were sampled from leaves taken from 5 plants per plot, from the fifth main- stem leaf down from the first expanded terminal leaf. Each sample was counted from a 1-in. disk taken between the main leave stem and the next lateral vein. Adults were sampled from 30 leaves/plot, same location using a binomial decision of counting a leaf as positive if 3 or more adults were epresent. This indicated a presence of 5 adults on the 5th leaf per plant. Weekly sweeps were taken in all plots for predators, parasites, and Lygus. Applications were made by ground with 5 nozzles/row, 1 overhead, and 2 swivel nozzles angled upward on a drop on each side of the row. Sprays were applied at 250 psi and 30 gal./ac.