Pilot study on the biological diversity of different litchi orchard

In this dissertation,the biological diversity of organic litchi orchard were researched.The result showed that there were 12 orders,62 families of insect and 7 orders other animals in the organic litchi orchard.The families of Coleoptera were the most in the pest community,the Lepidoptera and Orthoptera took second place.The proportion of Coleoptera,Lepidoptera and Orthoptera were 31.8%,18.2% and 18.2%,respectively.The species of natural enemy was quite abundance,which included 7 orders,15 families and 24 species.There were 12 species of spiders in the organic litchi orchard.The species of Coleoptera was the most species,which the proportion of 52.2%.The Hymenoptera took second place,which the proportion of 21.7%.In the group of insect in organic litchi orchard,pest insect represented 30.9%,natural enemy 28.4% and natural insect 40.7%.