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Phytoparasitica
A study was conducted to determine the extent of resistance to malathion in field populations of insects collected from nine granaries located in different regions of Israel. The results showed that the maximum resistance factor calcuated from the LCso s of the different insect species tested was: Tribolium castaneum (Herbst), x 538.0; Oryzaephilus surinamensis (L.), x 8.0; Sitophilus oryzae (L.), x 1.2; and Rhyzopertha dominica (F.), x 9.0. There were significant differences between the resistance level among strains collected from different locations in Israel. By using triphenyl phosphate (TPP), an inhibitor of carboxyesterase, it was shown that, in the case of T. castaneum and R. dominica, the resistance is a malathion-specific type and that in the case of O. surinamensis it is partially non-specific to malathion. The significance of these findings in selecting new insecticides to replace malathion as a grain protectant was considered. © 1986, Springer Science + Business Media B.V.. All rights reserved.
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Malathion resistance of stored-product insects in Israel
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Malathion resistance of stored-product insects in Israel
A study was conducted to determine the extent of resistance to malathion in field populations of insects collected from nine granaries located in different regions of Israel. The results showed that the maximum resistance factor calcuated from the LCso s of the different insect species tested was: Tribolium castaneum (Herbst), x 538.0; Oryzaephilus surinamensis (L.), x 8.0; Sitophilus oryzae (L.), x 1.2; and Rhyzopertha dominica (F.), x 9.0. There were significant differences between the resistance level among strains collected from different locations in Israel. By using triphenyl phosphate (TPP), an inhibitor of carboxyesterase, it was shown that, in the case of T. castaneum and R. dominica, the resistance is a malathion-specific type and that in the case of O. surinamensis it is partially non-specific to malathion. The significance of these findings in selecting new insecticides to replace malathion as a grain protectant was considered. © 1986, Springer Science + Business Media B.V.. All rights reserved.
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