אסיף מאגר המחקר החקלאי

The effect of low pressures on the mortality of six stored-product insect species

Year:

1966

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Volume :

2

Co-Authors:

Calderon, M., Ministry of Agriculture, Department of Plant Protection, Stored Products Division, Jaffa, Israel
Navarro, S., Ministry of Agriculture, Department of Plant Protection, Stored Products Division, Jaffa, Israel
Donahaye, E., Ministry of Agriculture, Department of Plant Protection, Stored Products Division, Jaffa, Israel

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Abstract:

The effect of low pressure (10-12 mm to 16-20 mm mercury) on the mortality of six species of common stored-product insects was examined in steel containers of 20 l. capacity filled with grain, which were held under low pressure for periods of 1-7 hr and 1-5 days at temperatures of 18±1°C and 25±1°C. The susceptibility of adults and larvae of the species tested to the above treatment is given below: the most susceptible to low pressure were, Ephestia cautella (Wlk.) adults, followed by Oryzaephilus surinamensis (L.) adults, Tribolium castaneum (Hbst.) adults, Callosobruchus maculatus (F.) adults, T. castaneum (Hbst.) larvae, Trogoderma granarium Everts larvae, Sitophilus oryzae (L.) adults, Callosobruchus maculatus (F.) larvae, S. oryzae (L.) larvae. In all species, 100 per cent mortality of both larvae and adults was obtained after 120 hr, except in the case of C. maculatus (F.) larvae and S. oryzae (L.) larvae. The results so far obtained indicate the possibility of using low pressure for the control of stored-product insects in grain, in particular where infestation is caused by the more susceptible insects to the above treatment. © 1966.

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