Testing for non-target effects of spinosad on twospotted spider mites and their predator Phytoseiulus persimilis under greenhouse conditions.
Exp Appl Acarol
; 38(2-3): 141-9, 2006.
Article
em En
| MEDLINE
| ID: mdl-16596348
ABSTRACT
The compatibility of the selective insecticide spinosad (Conserve SC), at rates recommended for thrips control in greenhouses, with release of the predatory mite Phytoseiulus persimilis Athias-Henriot (Acari Phytoseiidae) to control spider mites, was investigated in a crop of ivy geranium Pelargonium peltatum, cultivar 'Amethyst 96.' Plants were inoculated with twospotted spider mites, Tetranychus urticae Koch (Acari Tetranychidae), 2 weeks before treatments were applied. There were three treatment variables, each at two levels predators (released or not), spray application (water or Conserve SC at 2 ml/3.79 l), and timing of spray (1 day before or after predators were released). Twospotted spider mite populations then were sampled twice each week over a three-week period. The application or timing of spinosad had no effect on the ability of the predator to reduce the population of spider mites. Spider mite populations in the no-predator treatment continued to expand over the course of the experiment, while those in the predator-release treatment declined. We conclude that P. persimilis can be used in conjunction with spinosad on ivy geraniums without causing obvious detrimental effects to this predator or leading to a reduction in biological control.
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Base de dados:
MEDLINE
Assunto principal:
Controle Biológico de Vetores
/
Macrolídeos
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Tetranychidae
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Geranium
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Inseticidas
Idioma:
En
Ano de publicação:
2006
Tipo de documento:
Article