Influences of varying host: parasitoid ratios on parasitism of whitefly by three different parasitoid species

Egyptian Journal of Biological Pest Control

Li Lin¹  Jianhui Wu²  Shaukat Ali³ 

[1] Key Laboratory of Bio-Pesticide Innovation and Application, Engineering Research Center of Biological Control, South China Agricultural University, Guangzhou, People’Plant Qurantine Lab of Guangdong Inspection and Quarantine Technology Centre, Guangzhou, People’s Republic of China

关键词: Bemisia tabaci;    Parasitoids;    Density;    Interference;   

DOI  :  10.1186/s41938-018-0050-3

学科分类：动物科学

来源: Springer

【 摘 要 】

This study reports the effects of different host: parasitoid ratios on parasitic behavior and functional response of three different parasitoid species (Eretmocerus sp. nr. furuhashii, Encarsia bimaculata, and Encarsia sophia) attacking the sweetpotato whitefly, Bemisia tabaci, under laboratory conditions. The parasitic ability of three parasitoid species was significantly influenced by the whitefly density. Increasing host density had beneficial effect on parasite efficiency of Er. sp. nr. furuhashii, E. bimaculata, and E. sophia. The rate of instant attack (a) observed for Er. sp. nr. furuhashii, E. bimaculata, and E. sophia was 0.1649, 0.1113, and 0.0655, respectively. Total parasitic time (Th) observed for Er. sp. nr. furuhashii, E. bimaculata, and E. sophia was 0.0737, 0.2325, and 0.1936, respectively. In the second experiment, the parasitical action was also influenced by parasitoid density. At constant host density, the rate of parasitism increased with parasite density up to a certain density followed by a decrease in rate of parasitism with increasing parasitoid density.

【 授权许可】

CC BY