1. The Ministry of Education Key Laboratory of Biopesticide and Chemical Biology, School of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P.R. China
2. Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education/College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P.R. China
3. Wadsworth Center, New York State Department of Health, School of Public Health, State University of New York, Albany, NY 12201, USA