The effects of low oxygen tensions on three stored-product insect pests |
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| Authors: | S Navarro |
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| Institution: | 1. Div. of Stored Products, ARO, The Volcani Center, Bet Dagan
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| Abstract: | The relationship between different oxygen tensions and exposure times producing 95% mortality, and loss in weight of three stored-product insects at 54% R.H. and 26°C, was determined.Ephestia cautella (Wlk.) pupae andTribolium castaneum (Herbst) adults reacted in a similar pattern: the lower the oxygen concentration, the shorter the exposure time needed to produce 95% mortality, and the higher the rate of loss in weight. The response ofSitophilus oryzae (L.) adults was different: there was greater sensitivity at 1% oxygen than at the lower or higher levels of oxygen tested. A relationship was demonstrated between low oxygen tensions (0–5%) and the relative humidity of the environment for producing a lethal atmosphere forE. cautella pupae andT. castaneum adults. |
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