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ARS Home » Research » Publications at this Location » Publication #103095
Title: USE OF THE ENTOMOPATHOGENIC FUNGI, BEAUVERIA BASSIANA, AND PAECILOMYCES AS BIORATIONAL AGENTS AGAINST THE SILVERLEAF WHITEFLY (SLWF), BEMISIA ARGENTIFOLII, IN FIELD TRIALS IN UPLAND COTTON

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" rows). Plots were separated by 4 fallow rows and 20 ft. alleys. Beauveria bassiana as Naturalis, Troy Biosciences Inc. at 10 oz. Product/ac, 2.3x 107 conidiia/ml was used at full rate as single product applications. Beauveria bassiana as Mycotrol, Mycotech Corp., 0.5 lbs./ac, 2 x 10 13 spores/lb. was used at full rate as single product applications. Paecilomyces fumosoroseus PFR-97(R) Thermo Trilogy Corp., 0.025 lbs./gal., 1x 10 9 CFU (spores)/gm equivalent 20% product was used. These treatments were part of a 12-treatment random block design that included a þBest Agricultural Practice regimeþ, 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 present. 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.