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Response of female Ceratitis capitata (Diptera: Tephritidae) to a spinosad bait and polymer matrix mixture with extended residual effect in Hawaii.

Abstract

The effectiveness of foliar applications of protein baits against pestiferous fruit flies (Tephritidae) can be adversely affected by a rapid loss of attractive volatile compounds and by rainfall due to the high water solubility of the baits. In a large coffee, Coffea arabica L., plantation in Hawaii with high and low populations of Mediterranean fruit fly, Ceratitis capitata (Wiedemann) (Diptera: Tephritidae), the relative attractiveness of GF-120 NF Naturalyte Fruit Fly Bait as either a 40% (vol:vol) spray solution (= GF-120 NF) or as a formulated proprietary amorphous polymer matrix (= GF-120 APM) was compared. The GF-120 APM formulations contained either, 25, 50, or 75% of GF-120 NF (wt:wt). All baits were tested in association with visually attractive yellow bait stations as a way of standardizing the evaluations. With both high and low C. capitata populations, significantly more females were attracted to the fresh sprayed GF-120 NF than to any of the three fresh GF-120 APM formulations. The attractiveness of GF-120 sprayed decreased significantly after 1 wk, whereas 1-wk-old GF-120 APM formulations were as attractive as similar fresh formulations. GF-120 APM 75% aged for 3 wk outperformed similarly-aged sprayed GF-120 NF with comparatively high C. capitata populations. With low populations, both GF-120 APM 75% and GF-120 APM 50% aged for 2 wk outperformed the similarly aged sprayed GF-120 NF. Combined findings indicate that APM mixed with either 50 or 75% GF-120 applied to bait stations can be attractive to female C. capitata for up to 3 wk longer than the standard sprayed GF-120 NF.

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    • Authors

    Piñero JC, Souder SK, Gomez LE, Mau RF, Vargas RI

    Institution

    College of Tropical Agricultural Human Resources, University of Hawaii at Manoa, 3050 Maile Way, Honolulu, HI 96822, USA. pineroj@lincolnu.edu

    Source

    Journal of economic entomology 104:6 2011 Dec pg 1856-63

    MeSH

    Analysis of Variance
    Animals
    Ceratitis capitata
    Coffee
    Drug Combinations
    Environment
    Female
    Hawaii
    Insect Control
    Insecticides
    Macrolides
    Male
    Pheromones
    Polymers
    Population Density
    Seasons
    Time Factors

    Pub Type(s)

    Evaluation Studies
    Journal Article

    Language

    eng

    PubMed ID

    22299345