Toxicity of different insecticide mixtures against cotton bollworm, Helicoverpa armigera (Hub.) (Lepidoptera: Noctuidae). | [Pakistan Journal of Zoology • 2006]

Author(s):

1. M. Hamed: Plant Protection Division, Nuclear Institute for Agriculture and Biology NIAB, P.O. Box No. 128, Jhang Road, Faisalabad, Pakistan

2. R. A. Khan: Plant Protection Division, Nuclear Institute for Agriculture and Biology NIAB, P.O. Box No. 128, Jhang Road, Faisalabad, Pakistan

3. F. F. Jamil: Plant Protection Division, Nuclear Institute for Agriculture and Biology NIAB, P.O. Box No. 128, Jhang Road, Faisalabad, Pakistan

Abstract:

Toxicity of different insecticide mixtures belonging to different groups viz., decisTM 2.5EC + thiodanTM 35EC, decisTM 2.5EC + curacronTM 500EC, decisTM 2.5EC + somialfaTM 110EC, decisTM 2.5EC + advantageTM 20EC, thiodanTM 35EC+ curacronTM 500EC and thiodanTM 35EC + somialfaTM 110EC was recorded using their field recommended doses against Helicoverpa armigera (Hubner) by leaf-dip method. Percent mortality was determined to compare efficacy of mixtures and their probability of synergism. The results concluded that organophosphates in combination with pyrethroids exhibited an enhanced toxicity showing the high probability of synergistic effects. Significantly high toxicity was shown by decisTM 2.5EC + curacronTM 500EC which caused 100 per cent mortality to the insect followed by thiodanTM 35EC + somialfaTM 11OEC causing 83.3 per cent mortality after 72hrs of exposure. These findings on insecticide mixtures could serve as useful tool in the management of insecticide resistance.

Page(s): 39-42

DOI: DOI not available

Published: Journal: Pakistan Journal of Zoology, Volume: 38, Issue: 1, Year: 2006

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