Side effects of three pesticides on the black bean aphid parasitoid,Lysiphlebus fabarum (Marshall) (Hymenoptera: Aphidiidae)
Publish place: First National Conference on Medicinal Plants, Traditional Medicine and Organic Agriculture
Publish Year: 1393
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
HBHEAITH01_036
تاریخ نمایه سازی: 7 بهمن 1393
Abstract:
In this study, the side effects of thiacloprid+deltamethrin, pirimicarb and pymetrozine applied atthe maximum recommended field rates were investigated on the thelytokous population ofLysiphlebus fabarum (Marshall) using the IOBC and the life table methods. Newly emergedfemales (less than 24 h) were placed in drum cells contaminated with dry residues of pesticides(distilled water in the control). Thiacloprid+deltamethrin was very toxic to L. fabarum; causing100% mortality. Pirimicarb produced significant adverse effects on the mortality and fecundity;while pymetrozin did not. According to the IOBC standards, thiacloprid+deltamethrin (E =100%), pirimicarb (E = 62.49%) and pymetrozine (E = 10.35%) were classified as harmful,slightly harmful and harmless, respectively. Life table assays revealed that intrinsic rate ofnatural increase (rm) value in thiacloprid+deltamethrin (50%) and pirimicarb (12%) weresignificantly reduced; while pymetrozine had no effect on the intrinsic rate of natural increase(rm). Both the IOBC and the life table assay methods showed that pymetrozine was not toxic toL. fabarum. Therefore, the use of this pesticide in the IPM of black bean aphid along with thisnatural enemy seems to be practicable.
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Authors
Ardavan Mardani
Department of Plant Protection, College of Agriculture, University of Tehran
Qodratollah Sabahi
Department of Plant Protection, College of Agriculture, University of Tehran
Arash Rasekh
Department of Plant Protection, College of Agriculture, Shahid Chamran University of Ahvaz
Ali Almasi
Department of Plant Protection, College of Agriculture, University of Tehran
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