, Volume 14, Issue 4, pp 273–280 | Cite as

Malathion resistance of stored-product insects in Israel

  • S. Navarro
  • Y. Carmi
  • Y. Kashanchi
  • E. Shaaya


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; andRhyzopertha 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 ofT. castaneum andR. dominica, the resistance is a malathion-specific type and that in the case ofO. 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.

Key Words

Stored-product insects Tribolium castaneum Oryzaephilus surinamensis Sitophilus oryzae Rhyzopertha dominica resistance to malathion 


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Copyright information

© Springer Science + Business Media B.V. 1986

Authors and Affiliations

  • S. Navarro
    • 1
  • Y. Carmi
    • 1
  • Y. Kashanchi
    • 1
  • E. Shaaya
    • 1
  1. 1.Dept. of Stored Products, AROThe Volcani CenterBet DaganIsrael

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