Influence of Constant Temperature on Development and Reproduction of Encarsia guadeloupae Viggiani (Hymenoptera: Aphelinidae), a Parasitoid of the Spiraling Whitefly Aleurodicus dispersus Russell (Hemiptera: Aleyrodidae)

摘要

Encarsia guadeloupae Viggiani is an important parasitoid of Aleurodicus dispersus Russell. The effects of temperature (16, 20, 24, 28, and 32A degrees C) on development and reproduction of this parasitoid on A. dispersus were studied in laboratory experiments. The developmental duration of E. guadeloupae varied from 14.9 (32A degrees C) to 54.4 days (16A degrees C). The developmental threshold and thermal constant for an entire generation were 10.52A degrees C and 308.85 degree-days, respectively. The highest survival rate (63.8%) of immature E. guadeloupae was recorded at 28A degrees C. The average adult longevity ranged from 6.0 (32A degrees C) to 15.1 days (16A degrees C). The highest fecundity was observed at 28A degrees C. The intrinsic rate of increase (r (m) ), net reproduction rate (R (o) ), and finite rate of increase (lambda) were the highest at 28A degrees C, which were 0.18, 54.25 and 1.21, respectively. We concluded that 28A degrees C is the most suitable temperature for development and reproduction of E. guadeloupae.