| 英文摘要 |
"Cohorts of Thrips palmi Karny were reared on eggplant leaf at 15, 21, 25, 30, and 35 °C in growth chambers for 3 generations to study the life history traits of these thrips. The results showed that the survival rate of T. palmi from egg to adult was only 4%-8% at 35 °C, and the adult females and males lived only 2.9 and 2.8 days, respectively, without laying any eggs. Under the first 4 temperature conditions, the pre-adult stage took respectively 29.9, 19.6, 12.3, and 10.4 days to complete development. The longevity of adult females became shorter as the rearing temperature increased, being 21.6, 20.2, 15.4, and 9.7 days, at the respective temperatures. Females had the highest fecundity (57.1 eggs/female) at 25 °C, but the oviposition period was the shortest (ca. 21 days). Based upon the developmental period of immature stages, adult longevity, and fecundity, we concluded that 25-30 °C is optimal for population growth of T. palmi on eggplant. A simple linear regression of the developmental rate on temperature ranging from 15 to 30 °C showed that the lower developmental threshold (T_0) was 7.7 °C (SE = 0.2 °C) and the cumulative effective temperature (K) was 227.2 degree-days (SE = 3.3 degree-days) for T. palmi to complete development from eggs to adults. Based on the above values of T_0 and K, and meteorological data of ARI at Wufeng during 1999 to 2002, we estimated that this thrips could complete 25 to 26 generations per year in central Taiwan." |
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