Abstract
Callosobruchus chinensis was reared on Vigna radiata (green gram), Lence esculentum (Lentils) and Cicer arietinum (chickpea). Longevity, fecundity and hatchability of eggs of this pest were studied at different temperatures (30°C, 32°C, 34°C, 38°C, 42°C and 46°C) when reared on these stored grains. Fecundity and longevity were found to be significantly less at higher temperatures. Each female laid about 94 eggs at 30°C 'and onlk 21 eggs at 46°C on V. radiata. On L. esculentum, 98 eggs were laid by a single female at 32°C but only 20 eggs at 46°C. While on chickpea 72 and 22 eggs were laid at 32°C and_46?.0 respectively. The longevity decreased from 7.6 dayS at 30°C to 3.3 days at zr&°C on Vigna radiata, from 7 days at 30°C to 3.3 days at 46°C on LenCe esculentuM and on Cicer arietinum from 6.3 days to 3.6 days at 30°C and 46°C, respectively. Maximum eggs were laid on L. esculentum at 32°C and on Vigna radiata at 30°C, but hatching was maximum on V. radiata (84%) at 32°C. Almost no eggs hatched at 38°C and above, 54°C was found to be the lethal temperature as the insects died within 20 minutes at this temperature.
YASMIN KHALIL , FIRDAUSIA AZAM ALI. (1999) EFFECT OF TEMPERATURE ON CALLOSOBRUCHUS CHINENSIS (BRUCHIDAE : COLEOPTERA) REARED ON DIFFERENT STORED PRODUCTS , Punjab University Journal of Zoology, Volume 14, Issue 1.
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