Studies on Population Ecology of Thrips palmi KARNY. VII. Effect of Temperature on Population Growth

Abstract

The effects of temperature on population growth of Thrips palmi KARNY were examined by rearing experiment at constant temperatures. The threshold temperature of development and the thermal constant for pre-adult stage were estimated to be 11.6°C and 189. 1 day-degrees, respectively. The fecundity of female adult and the rate of oviposition per day became maximum at 25°C, and the values were 59. 6 eggs and 3. 8 eggs per day, respectively. The adult longevity and the generation time (T) became shorter as the rearing temperature became lower. The net reproductive rate (Rq) was maximum at 25°C. The intrinsic rate of natural increase (r) became higher as the rearing temperature became higher. The value was 0. 144 at 30°C and the reproductive rate per month was 75. 2. © 1985, JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY. All rights reserved.