4Carreck N L,Ball B V,Wilson J K. Virus succession in honeybee colonies infested with I Varroa destructor[J]. Apiaet,2002, 37(1) :45 -48.
5Lodesani M, Colombo M, Spreafico M. Ineffectiveness of Apistan treatment against the mite Varroa jacobsoni Oud. In several distrcts of Lombardy ( Italy ) [ J ]. Apidologie, 1995,26:67 - 72.
7Ritter W. Chemical control : options and problem [ M ]. Living with Varroa, 1993,75 : 17 - 23.
8Sivic F. Treating your bees in winter[J]. Bee Craft,1993,75: 17 -23.
9Elzen P J,Eischen F A, Baxter J R, et al. Fluvalinate resistance to Varroa jacobsoni from several geographic locations [J]. Amer. Bee J. , 1998,138:674 - 676.
10Delapane K S, Hood W M. Effect of delayed acaricide treatment in honey bee colonies parasitized by Varroa jacobsoni and a late - season treatment threshold of the south - eastern USA [J]. J. Apic. Res. ,1997,36:101 - 108.