Abstract:

Effective pest control is of great significance to the construction of Xinyang organic tea orchard. By surveying in field, consulting data and visiting farmer, the population status of the main insect pests and natural enemy were investigated in Xinyang organic tea orchard in 2007-2009. The results indicates that the main insects are Ectropis obliqua hypulina Wehrli (Ectropis o.), Euproctis pseudoconspersa Strand (Euproctis p.) and Empoasca vitis Gothe (Empoasca v.), and the main natural enemies are spiders, ladybugs and parasitics. In organic tea garden, between the one of the most important insects Euproctis p. and the populations of natural enemies, the relationship formula is y=0.8159x+3.9514, and coefficient of relevance is 0.7313. While that of the insect Empoasca v. and the populations of natural enemies, the relationship formula is y=0.482x+6.0326, and coefficient of relevance is 0.7960. The natural enemy had some inhibition influences to Euproctis p. and Empoasca v. The appearances of Ectropis o., Euproctis p. and Empoasca v. were in May and June together with their natural enemy in the same period. So, it is possible that to use natural enemy to control the insect pests.