Abstract:

The Phytoseiidae Mite, Typhlodromus bambusae, was a dominant predator associated with the mite pests of Moso Bamboo. The effects of 6 constant temperatures (16,20,24,28,32 and 36℃) on development, oviposition and survival of T. bambusae, reared on Schizotetranychus bambusae, were studied. The eggs could not hatch at 36℃. Within the range of 16～32℃, the development time of egg, larva, protonymph, deutonymph shortened as temperature increased. The developmental threshold temperatures for egg, lava, protonymph, deutonymph, from egg to adult, and pre-oviposition were 10.21, 10.67, 10.94, 10.76, 10.44 and 13.36℃, respectively. The developmental effective accumulated temperatures for egg, lava, protonymph, deutonymph, from egg to adult, and female adult pre-oviposition were 36.18,12.61,21.46,21.63,93.71 and 39.43 DD, respectively. The nonlinear Wang-Nan-Ding model gave a good fit to the relationship between developmental rate and temperature. Percentage of survival was the highest (92.50%) at 20℃, and lowest (67.50%) at 32℃. Temperature affected fecundity and longevity significantly. The oviposition period was the longest (24.43d) at 20℃, whereas the shortest (5.14d) at 32℃. The eggs laid by per female ranged from 31.26 at 24℃ to 9.20 at 32℃. A nonlinear regression model could fit the relationship between eggs laid by per female (Y) and temperature (T). The equation was Y=-171.694 2+17.273 2T-0.036 3T²(R=0.964 8_*).

Key words: Typhlodromus bambusae, Experimental population, Development and reproduction, Temperature