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Kaolin particle films suppress many apple pests, disrupt natural enemies and promote woolly apple aphid
Author(s) -
Markó V.,
Blommers L. H. M.,
Bogya S.,
Helsen H.
Publication year - 2008
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/j.1439-0418.2007.01233.x
Subject(s) - biology , aphid , codling moth , horticulture , botany , weevil , infestation , sawfly , tortricidae , pest analysis , hymenoptera , lepidoptera genitalia
Multiple applications of hydrophobic kaolin particle film in apple orchards suppressed numbers of blossom weevil ( Anthonomus pomorum ), brown leaf weevil ( Phyllobius oblongus ), attelabid weevil ( Caenorhinus pauxillus ), leafhoppers ( Empoasca vitis and Zygina flammigera ) and green apple aphid ( Aphis pomi ) colonies. The kaolin treatments reduced the apple sawfly ( Hoplocampa testudinea ) fruit infestation on cultivar J. Grieve, and the fruit damage caused by oyster scale ( Quadraspidiotus ostreaeformis ), mussel scale ( Lepidosaphes ulmi ), early caterpillars, leaf rolling moths (Tortricidae), fruitlet‐mining tortrix moth ( Pammene rhediella ) and codling moth ( Cydia pomonella ). There was no effect on the number of colonies of rosy leaf curling aphid ( Dysaphis devecta ), nor on the fruit damage caused by common earwig ( Forficula auricularia ) and apple sawfly on cv. G. Delicious. The level of infestation of rosy apple aphid ( Dysaphis plantaginea ) , leaf miner moths ( Phyllonorycter blancardella , Lyonetia clerkella ), and agromyzid flies ( Phytomyza heringiana ) increased in the kaolin‐treated plots. Kaolin treatments promoted woolly apple aphid ( Eriosoma lanigerum ) infestation, which became severe, while it reduced the abundance of polyphagous predators like F. auricularia , predaceous Heteroptera and Coleoptera, the red velvet mite ( Allothrombium fuliginosum ), spiders (Araneae) and the abundance of common black ant ( Lasius niger ). The treatments also reduced parasitism of the apple sawfly by the ichneumonid Lathrolestes ensator . Many weeks after ending the kaolin treatments, the number of predaceous Coleoptera and especially the number of spiders remained low in the kaolin‐treated plots.