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- Title
Effects of selected insecticides onDiadegma semiclausum(Hymenoptera: Ichneumonidae) andOomyzus sokolowskii(Hymenoptera: Eulophidae), parasitoids ofPlutella xylostella(Lepidoptera: Plutellidae).
- Authors
Haseeb, Muhammad; Amano, Hiroshi; Tong-Xian Liu
- Abstract
Field doses of six selected insecticides were tested against the immature (pupae) and mature (adult) stages ofDiadegma semiclausum(Hellén) andOomyzus sokolowskii(Kurdjumov), parasitoids of the diamondback moth,Plutella xylostella(L.). Effects of contact toxicity (direct spraying) of the six insecticides on emergence of parasitoids were found negligible on both species except permethrin which caused 37.5% mortality. All adults of both parasitoid species died 24 hours after exposure to chlorfenapyr, emamectin benzoate and permethrin. In contrast, the three insect growth regulators (IGRs), chlorfluazuron, flufenoxuron and teflubenzuron, were found harmless to both species, and adult mortality of both parasitoid species was 0–16.7%. However, parasitism by the females of both parasitoid species was severely impaired when the females were offered the three IGR diluted solutions for 24 hours. Effects of oral toxicities of the IGRs on longevity of both parasitoids after 12 hours exposure were found to be significantly different between males and females. Compatibility of tested insecticides with D. semiclausum and O. sokolowskii and integration of compatible insecticides with these parasitoids in integrated pest management programs of crucifers are discussed.
- Subjects
HYMENOPTERA; INSECTICIDES; PARASITOIDS; MORTALITY; PLUTELLIDAE; PLUTELLA; YPONOMEUTIDAE
- Publication
Insect Science, 2005, Vol 12, Issue 3, p163
- ISSN
1672-9609
- Publication type
Article
- DOI
10.1111/j.1005-295X.2005.00020.x