Predation of Typhlodromus bambusae Ehara on Sehizotetranychus bambsae
Liu, H.; Zhao, Z.; Wang, J.; Wu, S.
Ying Yong Sheng Tai Xue Bao 17(2): 280-284
2006
ISSN/ISBN: 1001-9332 PMID: 16706054 Document Number: 597818
The simulation study under laboratory condition showed that the functional responses of Typhlodromus bambuse to Schizotetranychus bambuse at different development stages could be expressed by the curve of Holling Type H. The number of prey consumed by predator quickly increased with initial prey density, but soon leveled off. At 25 ± 0.5 °C, the handling time (Th) of T. bambuse to S. bambusae at the stages of egg, larva, protonymph, deurtonymph and female was in order of egg larva protonymph deurtonymph female, and the selection coefficient (Q) of T. bambusae to S. bambusae egg, larva, protonymph, deurtonymph and female adult was 1.47, 1.34, 1.16, 0.90 and 0.15, respectively. The numerical response of T. bambusae to S. bambusae revealed that the fecundity of the Phytoseiidoe mite was significantly affected by the prey density. When the ratio of predator to prey was 1: 19, the daily oviposition of the predator varied from 0.5 to 2.0 eggs per female, which was increased with increasing prey density, while if the ratio was 1: 15 or more, the daily oviposition decreased to about 1.8 eggs per female, which was probably due to the interference of high prey density to predation.