THE EFFECT OF HUMIDITY CONTENTS OF THE TWO INSECTS CONFUSED FLOUR BEETLE Tribolium Confusum Duval AND SOUTH COWPEA BEETLE Callosobruchus maculatus (F.) ON TOLERATING EXPOSURE TO HIGH TEMPERATURE DEGREES AT DIFFERENT PERIODS
Mesopotamia Journal of Agriculture,
2014, Volume 42, Issue 1, Pages 209-215
AbstractThe effect of humidity contents of Tribolium confusum Duval (Coleoptera: Tenebrionidae) and Callosobruchus maculatus (F.) (Coleoptera: Bruchidae) on tolerating exposure to high temperature degrees at different periods showed that the average mortality percentage was in direct propotion with the increasing temperatures 45 , 50 and 55 C° which was 4.07 , 88.89 and 100.00 % of T. confusum respectively, while the percentages 46.67 , 74.44 and 79.25 % respectively for C. maculates. The rate of mortality increased by increasing of exposure periods 0.5 , 1.0 and 1.5 hrs which was 41.67 , 50.27 and 52.77 % respectively in T. confusum and 28.83 , 56.94 and 65.00 % in C. maculatus respectively. No rate of mortality was recorded in control. As for the humidity contents of the two insects, it was shown that the percentage of sap coefficient for T. confusum was higher than that of C. maculatus which was 0.528 and 0.394 % respectively.
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