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    A Native Weed as a Trap Crop for Whiteflies in Cotton

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    Author
    Ellsworth, Peter C.
    Chernicky, Jon P.
    Byrne, David N.
    Gibson, Roberta
    Meade, Donna
    Issue Date
    1992-02
    Keywords
    Agriculture -- Arizona
    Cotton -- Arizona
    Cotton -- Insect investigations
    
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    Publisher
    College of Agriculture, University of Arizona (Tucson, AZ)
    Journal
    Cotton: A College of Agriculture Report
    Abstract
    A field study was conducted during 1991 to evaluate the effectiveness of Physalis wrightii Gray, as a trap crop for Bemisia tabaci (Gennadius) when grown with the commercial crop Gossypium barbedense L. Aldicarb at two rates was used in P. wrightii for control of B. tabaci. Three sampling methods: pan counts, leaf turns, and leaf counts measured B. tabaci numbers in both crops. Aldicarb treatment in the trap crop did significantly affect B. tabaci populations in comparison with untreated P. wrightii (P= 0.000, df =2, 240). Differences in numbers of adults observed on the two hosts were not significant. Analysis of aldicarb metabolite residues by high pressure liquid chromatography exhibited a pronounced dose effect (P= 0.001, df =2, 22) in the trap crop leaf tissues. The chemically treated trap crop did significantly protect the cotton crop from larger and more rapidly developing sweetpotato whitefly populations when compared to the untreated check.
    Series/Report no.
    370091
    Series P-91
    Collections
    Cotton Report 1992

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