Abstract:

In this paper, the parameters of experiment population life table of the nature enemy mite Typhlodromus bambusae and introduced enemy Amblyseius cucumeris were studied in the laboratory to evaluate their potentials as a biocontrol agent against the 4 species in Moso Bamboo forests. The result showed that :(1)The generation survival rate of A. cucumeris were 90.40%, 77.55%, 87.93%, 81.63% and average fecundity of per female of A. cucumeris were 38.12, 45.77, 35.59, 30.26 when if feeding on S. nanjingensis, S. bambusae, A. corpuzae, A. bambusae. The generations survival rate of T. bambusae<.i> were 95.23%, 100%, 87.1%, 80.48% and average fecundity of per female of T. bambusae were 44.5, 46.8, 41.15, 20.1 when if feeding on S. nanjingensis, S. bambusae, A. corpuzae, A. bambusae; (2)The intrinsic rate of natural which has been known as the most important parameter of population increase of T. bambusae (0.155) was very similar to the A. cucumeris(0.154) and higher than their prey, S. nanjingensis(0.089);(3)The intrinsic rate of natural increase of T. bambusae (0.152) was very similar to the A. cucumeris(0.152) and both lower than their prey S. bambusae; (4) The intrinsic rate of natural increase of T. bambusae (0.148) is lower than of A. cucumeris (0.175) when they were feeding on A.corpuzae(0.185);(5) The intrinsic rate of natural increase of A. cucumeris(0.144) is lowed when if feeding on A. bambusae than 3 spider mites of Moso Bamboo. T. bambusae showed a lower fecundity when feeding on A. bambusae than those of A. cucumeris and most females tested escaped from experimental areas since 1998 A. cucumersis was released to control pests mites into Moso Bamboo forests during May-July. It has been showed that A. cucumeris may be a better biological control agent of pest of Moso Bamboo.

Key words: Typhlodromus bambusae, Amblyseius cucumeris, Parameters of experiment population life table, Biocontrol, Integrate management