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ARS Home » Research » Publications at this Location » Publication #103342
Title: EFFECTS OF PYRETHROID INSECTICIDES ALONE AND IN MIXTURES ON SILVERLEAF WHITEFLY AND COTTON, CAULIFLOWER, AND BROCCOLI YIELDS.

Author
item Chu, Chang Chi
item NATWICK, ERIC - COOP. RES, HOLTVILLE, CA
item Henneberry, Thomas
item LEE, R. - USEPA ECOLOGY, WASH., DC

Submitted to: Sweetpotato Whitefly Progress Review Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 6/1/1999
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Insecticide efficacy studies for silverleaf whitefly, Bemisia argentifolii Bellows and Perring, control were conducted in the Imperial Valley, California from 1991 to 1995. Three studies were conducted on cotton in 1992, 1994 and 1995, one on broccoli in 1991 and one on cauliflower in 1993. Results showed that silverleaf whitefly control on cotton, broccoli and cauliflower was more effective when a pyrethroid insecticide (e.g. fenpropathrin or bifenthrin) was mixed with an organophosphate (e.g. acephate) or a cyclodiene (e.g. tralomethrin) compound as compared to either material used alone. The effect appeared to be additive toxicity of pyrethroid and a second compound with a different mode of action. Cotton lint and cauliflower yields were increased and broccoli matured earlier in pyrethroid-phosphate or pyrethroid-cyclodiene mixture treated plots as compared to plots treated with the individual chemicals alone.