Functional response of Pangia sababensis to Bemisia tabaci
Author of the article:ZHAO Dong-Mei1** QUE Xin-Yi2 ZENG Li-Ling2 HUANG Chu-Yang2 WANG Xing-Min2***
Author's Workplace:1. Shandong (Linyi) of Modern Agriculture, Zhejiang University, Linyi 276034, China; 2. Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, Engineering Research Center of Biological Control of Agricultural Pests of Guangdong Province, Department of Entomology, College of Plant Protection, South China Agricultural University, Guangzhou 510642, China
Key Words: Pangia sababensis; Bemisia tabaci; predatory ability; functional response; temperature; predation quantity
Abstract:
[Aim] To assess the potential of using Pangia
sababensis as a biological control for Bemisia tabaci. [Methods] The number of eggs, 1st-4th instar nymphs and adults of B.
tabaci consumed by adult P. sababensis were recorded under
laboratory conditions. The functional response, search efficiency, and
density-dependent interference, were also calculated. [Results] The functional response of adult P.
sababensis to B. tabaci eggs, 1st-4th instar nymphs and pseudopupae, conformed to the Holling Ⅱ
type. This suggests that adult P. sababensis are effective predators of B.
tabaci. Our results indicate that P. sababensis has a high predatory
capacity for different developmental stages of B. tabaci, and that
predation rates increase with prey density. However, the increase in predation
rate declined at higher prey densities. Adult P. sababensis were most efficient
searching for eggs and least efficient searching for 4th instar nymphs.
Processing time was the shortest for eggs and longest for pupae. Furthermore,
search efficiency increased with temperature within the range of 15-30 ℃. [Conclusion] P. sababensis is an efficient
predator of B. tabaci and has the potential to be an effective
biological control for this pest. Temperature, however, has a significant
effect on its predatory efficiency. In addition, at a given prey
density, the predation rate and search efficiency of P. sababensis declined
with increasing conspecific density. These results provide a scientific basis
for utilizing P. sababensis as a biological control for B. tabaci.