A study on succession in insect communities in tea plantations not treated with pesticides on the Leizhou Peninsula.
Principal component analysis was used to examine succession in insect communities in tea plantations not treated with pesticides on the Leizhou Peninsula, Guangdong Province, China. During the 1st of 4 stages, from plantation establishment to the start of production, insects tended to stay on the young leaves and Caloptilia theivora, Petaphora [? Pterophorus] sp. and Clania minuscula [Eumeta minuscula] were common. During the 2nd and 3rd stages, through peak production to the start of the senescent period, pests caused only slight damage because they were constrained by their natural enemies. During the 4th, senescent period, serious damage was caused by pests such as the oecophorid Casmara patrona and the scolytid Xyleborus formicatus [Euwallacea fornicatus]. The community evenness index and community diversity index reached maxima during peak production and were much smaller in the 2-year-old and senescent plantations.