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Prof. Fares Amin Mohamed Ellaqwa :: Publications:

Title:
EFFiCACY OF A MODIFIED ATMOSPHERE OF ARO1JND 1% OXYGEN PLUS 99% NITROGEN ON SOME STORED PRODUCT INSECTS
Authors: El-Lakwah, F.A. *; Darwish. AA. *; and Mohamed. R.A. **
Year: 1997
Keywords: Not Available
Journal: Not Available
Volume: Not Available
Issue: Not Available
Pages: Not Available
Publisher: Not Available
Local/International: Local
Paper Link: Not Available
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Abstract:

To avoid the problem of using methyl bromide and synthetic insecticides for controlling stored product pests, an alternative technique. i.e. the application of modified atmospheres, is available. Thus, this study aims lo evaluate the efficacy of using a modified atmosphere of approximately 1% 02 plus 99% N2 against some stored product insects, namely; the rice weevil iSitophilus oryzae (L.)1. the lesser grain borer LRhizopertha dominica (F.)I and the red flour beetle ITribolium castaneum (l-{erbst.)1. Experiments were carried out in the laboratory at 26 and 6°C. Results revealed that the time required to achieve certain kill for the various stages of the three insect species was considerably longer at knet temperature than at higher one. Marked differences in the susceptibilites of the various stages of the insect species were obtained, whereas the adult stage was the most sensitive one. T. castaneum was the most susceptible species. The LT99-values recorded orvzae were 6.9, 47.3, 63.4 and 102 days at 26°C and 10.2, 73. 17 and 108 days at 6°C for the adult, pupa, larva, and egg, respectively. The corresponding values of R. dominica were 5.8, 30.4, 82.3 and 38.5 days at 26°C and 32.1. 100, 143 and 132 days at 6°C, respectively. While, in case of T castaneum, these values were 2, 29.3, 13.2. and 19.6 dais at 26°C and 15.1, 45.2, 31.2 and 47.7 days al 6°C for the adult, pupa. larva and egg. respectively.

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