Interactive effects of selected pesticides on the two-spotted spider mite and its fungal pathogen Neozygites floridana |
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Authors: | R. L. Brandenburg and G. G. Kennedy |
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Affiliation: | (1) Department of Entomology, North Carolina State University, 27650 Raleigh, NC, U.S.A.;(2) Present address: Department of Entomology, 1-87 Agriculture Bldg., University of Missouri, 65211 Columbia, MO, U.S.A. |
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Abstract: | Benomyl affected populations of Tetranychus urticae by interfering with the pathogenic fungus, Neozygites floridana. Benomyl delayed but prolonged spider mite outbreaks. Few mites were infected with the pathogen when benomyl was used. Reductions in mite populations treated with fentin hydroxide were associated with a high incidence of N. floridana infection. Benomyl did not affect sporulation of N. floridana but appeared to inhibit conidial germination or growth of the fungus.
Résumé Le bénomyl a modifié les populations de Tetranychus urticae Koch en interférant avec son champignon pathogène, Neozygites floridana (Weiser & Muma). Le bénomyl retardait mais prolongeait les pullulations de l'acarien. Peu d'acariens étaient infectés par le champignon quand on utilisait du bénomyl. Les réductions des populations d'acariens traitées avec l'hydroxyde de fentine étaient associées à un haut niveau d'infection par N. floridana. Le bénomyl ne modifiait pas la sporulation de N. floridana mais semblait inhiber la germination des conidies ou la croissance du champignon. |
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Keywords: | Two-spotted Spider Mite Tetranychus urticae Neozygites floridana Pesticide Interactions Acari Tetranychidae |
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