Abstract
Pulse beetle, Callosobruchus chinensis L., is a major pest of stored chickpea. To reduce infestation of
chickpea grains by this pest, the impact of short temperature changes on various life cycle aspects of
this pest on chickpea grains was studied. Shifts of temperatures, from the average storage temperature
of 30oC, of plus or minus 5, 10 or 15oC for either five or ten minutes each day for two days, was
sufficient to affect the life cycle of the pest and reduce infestation. In general the larger the
temperature shift and the longer the time at the shifted temperature, the greater was the effect. The
treatment of 15oC for 10 minutes proved to be the most effective reducing the number of days to death
from 19.77 to 4.97 days, the number of eggs laid per grain from 3.92 to 1.21 eggs, the number of F1
adults per test sample from 13.71 to 0.93 adults, the lifespan of F1 adults from 18.39 to 2.75 days, the
number of holes per grain from 1.63 to 0.18 holes and the percent weight loss of grains from 29.61 to
8.69%. These data suggest that short, but significant, changes in temperature can adversely affect the
physiology of this pest and provides a potential method for reducing product loss.
Farid Asif Shaheen. (2014) CRITICAL TEMPERATURE CHANGE AS IMPORTANT FACTOR OF CALLOSOBRUCHUS CHINENSIS L. MANAGEMENT IN CHICKPEA GRAINS, Asian Journal of Agriculture and Biology, Volume 2, Issue 4.
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