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Determination Of (Lc50) For Some Insecticides On Susceptible Two Spottted Spider Mite Tetranychus Urticae (Koch) Infesting Caster Bean
N.M. Zaidi
S.M.Ahdaya
and E.T.Zentane
Department of Plant Protection, Faculty of Agriculture,University of El-Fatah, Libya
Abstract
Two spotted spider mite Tetranychus urticae (Koch) is a very dangerous agriculture pest which attacks over 100 different crops. Lately the mite problem was substantiated due to change in agro ecosystem, especially intensive use of pesticides which resulted in ecological imbalance, and destruction of natural enemies of mites, in addition to the increased level of resistance in the population. A laboratory study was conducted on a strain ofT. urticae infesting caster bean Ricinus cammunis (F) which was never treated with pesticides, hence regarded as susceptible. To determine toxicity lines to some insecticides, a slide dip technique was used, and results were recorded 48 hours after treatment. The data were subjected to statistical analysis, and the (Lc50) of the insecticides Bromopropylate, Dicofol, Chloropyrifos-metthyl, Pyridaphenthion and Halfenprox were 185, 7.4, 20.8, 46 and 900 ppm, respectively. The results illustrated the strong efficacy of Dicofol on this strain. These results could also be used as a data base to monitor the development of pesticide resistance in this strain of T. urticae in westren Libya.
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| New Publications |
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The Arab Scientists in Cooperation with The High Institute of Marine Research. Publish all the researches abstracts, which presented in The Regional Workshop on Marine Sciences and Natural Resources, Tishreen University, Lattakia, Syria, 25-26 May 2004.
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| New Publications |
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The Arab Scientists in Cooperation with The Egyptian Society for Biological Control of Pests . Publish all the researches abstracts, which presented in The First Arab Conference of Applied Biological Pest Control, Cairo, Egypt, 5-7 April 2004.
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| Conferences, Fez |
The First International Symposium on Environnement protection for development Biotechnological aspects. Fez, December
15 – 17, 2004.
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| Conferences, Syria |
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The Second Syrian-Egyptian conference in the Agriculture and Food.
Agriculture Faculty, Al-Baath university, Homs, Syria. 25-28 April, 05
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| Conference,Yemen |
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Current Status of Plant Protection in Yemen and Future Strategy.
Faculty of Agriculture, Sana'a University, Sana'a, yemen. December 18-20/2004
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| Conferences Canada |
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The 9th International Conference of the Orthopterists’ Society
Canada, on August 14 19, 2005
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| Conferences, Egypt |
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The First Arab Conference on Applications of Biological Control of Pests in Arab Countries
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| Workshop,Lebanon |
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New Workshop
Middle-East Academy for Medicine of Ageing
First Annual Middle-East Age & Aging Meeting
8-11 April, 2004
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| Publications |
Arab Society for Plant Protection (ASPP) in Cooperation with The Arab Scientists
Publish all the researches abstracts, which presented in the Eighth Arab Congress of
Plant Protection, held in Faculty of Agriculture, Omar Al-Mukhtar University, El-beida
City, Libya, October 12-16,2003
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