Abstract:

Abstract：【OBJECTIVE】Making an investigation on the varieties of main pests and natural enemy and the dynamic state of community, can offer evidence for comprehensively treat and continuously control the advantage varieties of tea pest.【METHOD】To record the pests and natural enemy into classes and do number statistical analysis by lamplight collect and the investigation in mulberry fields. 【RESULTS】There are 45 kinds of pests and 24 kinds of natural enemy to be found. The main pests are Empoasca uititis Gothe, Toxoptera aurantii Boyer de Fonsecolombe, Scirtothrips dorsalis Hood, Ectropis obligua Warren and Tea Mitest.The main natural enemy are spider, wasps and Chrusopa septempuntata Wesmael.In organic tea garden, the best control time of nature enemy is August, the ratio of beneficial insect to pests is 1:0.96.The second peak of the varieties numeric come at June and September. And the total increment of pests is bigger than the total increment of natural enemy, The natural control is backward. 【CONCLUSION】There are biodiversity and stability and dynamic balance in organic tea garden. But for effective control and reduce a loss by the pest, the other way should be used.