Open AccessGreenhouse Whitefly Control on Marigold, Michigan, 1990
Author(s) -
D. R. Smitley,
T. W. Davis,
K. A. Kearns,
Clauzell Stevens
Publication year - 1991
Publication title -
insecticide and acaricide tests
Language(s) - English
Resource type - Journals
ISSN - 0276-3656
DOI - 10.1093/iat/16.1.255
Subject(s) - whitefly , sprayer , greenhouse , horticulture , thrips , greenhouse whitefly , pupa , biology , western flower thrips , larva , toxicology , botany , agronomy , pest analysis , homoptera , trialeurodes , thripidae
Thirty-six greenhouse grown 8-wk-old (6 inch) marigold plants were used for this experiment. Each treatment was replicated 6 times. Precounts of 3 leaves/plant were completed on 9 Jul. Spray applications were made 3 times on 9, 19, and 30 Jul. Insecticides were applied with an R&D C02 Sprayer with a 8003 nozzle at 50 psi until runoff. A postcount sample of 5 leaves/plant was taken on 6 Aug. The number of whiteflies reported for all sample dates is the total number of whitefly larvae and pupae counted on leaf samples. Three flowers/plant were submerged in 70% EtOH to extract and count flower thrips on 6 Aug.
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