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- Title
Effect of Temperature on the Development, Survival, Fecundity and Longevity of Stored Grain Pest, Trogoderma granarium.
- Authors
Riaz, Tanzeela; Shakoori, Farah Rauf; Ali, Syed Shahid
- Abstract
Effect, of different temperatures ranging from 15 to 45°C at 60±5% R.H have been studied on the survival, fecundity, egg hatching duration, length of larval and pupil periods and mortality of eggs, larvae and pupae of a stored grain pest Trogoderma granarium. The adult female survived for 19.62±2.18 days at 25°C, but when temperature increased its longevity decreased. The male, on other hand, survived for 13.84l-2.15 days at 20°C and its longevity also decreased with increase in temperature. Maximum egg laying occurred at 30 and 35°C and declined at 20 and 40°C. Hatching period of eggs, development of larvae into pupa and emergence of adult was minimum at 35°C but the developmental periods were prolonged at 25 and 30°C. Larvae did not pupate at 20 and 40°C. Eggs hatched after 7.15±1.92 days at 35°C while it was delayed to 13.19±1.38 days at 25°C. The larval and pupal periods were considerably reduced at 35°C. The total developmental period was 60.46, 41.48 and 36.53 days at 25, 30 and 35°C, respectively. So it can be concluded from this study that T. granarium could not develop or complete its development at 20 and 40°C. The optimum temperature for development of T. granarium was 35°C.
- Subjects
KHAPRA beetle; GRAIN storage diseases &; injuries; INSECT pests; PHYSIOLOGICAL effects of temperature; INSECT larvae; INSECT egg hatchability
- Publication
Pakistan Journal of Zoology, 2014, Vol 46, Issue 6, p1485
- ISSN
0030-9923
- Publication type
Article