SackettBuddleVincent2007

Reference

Sackett, T.E., Buddle, C.M. and Vincent, C. (2007) Effectsof kaolin on the composition of generalist predator assemblages and parasitism of Choristoneura rosaceana (Lep., Tortricidae) in apple orchards. Journal of Applied Entomology, 131(7):478-485.

Abstract

In three apple orchards, we tested how the hydrophilic kaolin clay particle film Surround WP affected the diversity of generalist arthropod predator assemblages in orchard foliage and the parasitism of the pest species Choristoneura rosaceana (Harris) (obliquebanded leafroller) (Lep., Tortricidae). In two orchards, kaolin was applied to orchard foliage once a week for 4 weeks, between mid-June and mid-July in 2004 and 2005. In the third orchard kaolin was applied to foliage twice over 2 weeks in June 2004. We quantified the proportion of larvae C. rosaceana parasitized, larval populations, and the relative abundance and assemblage composition of generalist predators (spiders and insects) in the orchards. Kaolin altered the species composition of the generalist predator assemblages and reduced the relative abundances of certain generalist predators, most notably jumping and crab spiders (Salticidae and Philodromidae), assassin bugs (Reduviidae), ants (Formicidae) and coccinellids (Coccinellidae). In contrast, the relative abundances of web-spinning spiders (Araneidae, Dictynidae, Theridiidae) were not affected. Kaolin did not affect the proportion of parasitized C. rosaceana larvae, which ranged from 24% to 47% in control and kaolin treatments, or the relative proportions of parasitoid taxa. The kaolin formulation did not affect the abundance of C. rosaceana larvae, but in one orchard, kaolin did reduce the abundance of the combined numbers of C. rosaceana and another tortricid pest, Argyrotaenia velutiana. Although kaolin does not affect parasitism of C. rosaceana, it significantly changes the composition of generalist predator assemblages in orchard foliage.

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@ARTICLE { SackettBuddleVincent2007,
    AUTHOR = { Sackett, T.E. and Buddle, C.M. and Vincent, C. },
    TITLE = { Effectsof kaolin on the composition of generalist predator assemblages and parasitism of Choristoneura rosaceana (Lep., Tortricidae) in apple orchards },
    JOURNAL = { Journal of Applied Entomology },
    YEAR = { 2007 },
    VOLUME = { 131 },
    PAGES = { 478-485 },
    NUMBER = { 7 },
    NOTE = { ISI Document Delivery No.: 201SE },
    ABSTRACT = { In three apple orchards, we tested how the hydrophilic kaolin clay particle film Surround WP affected the diversity of generalist arthropod predator assemblages in orchard foliage and the parasitism of the pest species Choristoneura rosaceana (Harris) (obliquebanded leafroller) (Lep., Tortricidae). In two orchards, kaolin was applied to orchard foliage once a week for 4 weeks, between mid-June and mid-July in 2004 and 2005. In the third orchard kaolin was applied to foliage twice over 2 weeks in June 2004. We quantified the proportion of larvae C. rosaceana parasitized, larval populations, and the relative abundance and assemblage composition of generalist predators (spiders and insects) in the orchards. Kaolin altered the species composition of the generalist predator assemblages and reduced the relative abundances of certain generalist predators, most notably jumping and crab spiders (Salticidae and Philodromidae), assassin bugs (Reduviidae), ants (Formicidae) and coccinellids (Coccinellidae). In contrast, the relative abundances of web-spinning spiders (Araneidae, Dictynidae, Theridiidae) were not affected. Kaolin did not affect the proportion of parasitized C. rosaceana larvae, which ranged from 24% to 47% in control and kaolin treatments, or the relative proportions of parasitoid taxa. The kaolin formulation did not affect the abundance of C. rosaceana larvae, but in one orchard, kaolin did reduce the abundance of the combined numbers of C. rosaceana and another tortricid pest, Argyrotaenia velutiana. Although kaolin does not affect parasitism of C. rosaceana, it significantly changes the composition of generalist predator assemblages in orchard foliage. },
    KEYWORDS = { leafroller, natural enemies, particle spray, spiders OBLIQUEBANDED LEAFROLLER LEPIDOPTERA; CODLING MOTH LEPIDOPTERA; SPIDERS ARANEAE; PARTICLE FILM; CROSS-RESISTANCE; PEST-MANAGEMENT; PEAR ORCHARDS; INSECTICIDES; POPULATIONS; PREY },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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