6Shen J,Ding X Y,Liu D Y,et al.Intersimple sequence repeats(ISSR)molecular fingerprinting markers for authenticating populations of Dendrobium officinale Kimura et Migo[J].Biol Pharm Bull,2006,29(3):420-422.
7PimenteI D. Environmental and economic costs of the application of pesticides primarily in the United States[J]. Environ Dev Sus- tain, 2005, 7 (2) :229.
8Pimentel D, McLaughlin L, Zepp A, et al. Environmental and economic effects of reducing pesticide use in agriculture[J]. Ag- ric Ecosyst Environ, 1993, 46( 1 ) :273.