Abstract
The development, survivorship and reproduction of Bemisia tabaci B bi otype on eggplant at seven constant temperatures (17, 20, 23, 26, 29, 32 and 35℃) were studied. The developmental periods from egg to adult varied from 48.7 days at 17℃ to 13.9 days at 29℃ and the develo pmental threshold estimated for a generation by linear regression was 12.4℃. The optimum temperature for B. tabaci population growth was 26℃, both extremely low (17℃) and high temperature (32℃) delayed the de velopment. Survivorships from egg to adult was 67.3 % at 26℃, 27.6 % and 29.0 % at 35℃ and 17℃ resp ectively. The average longevity of females ranged from 39.6 days at 20℃ to 12.8 days at 35℃. Ovipo sition per female varied from 164.8 eggs at 20℃ to 78.5 eggs at 32℃. Both the longevity and oviposition of B. tabaci females at different temperatures were significantly different ( P 0.05), and the intrinsic rate of natural increase ( r m ) for B. tabaci at 29℃ was the highest.
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