1. Chen H, Liang GM, Zou LY, Guo F, Wu KM, Guo YY (2010) Research progresses in the cold hardiness of insects. Plant Prot 36(2):18–24
2. Chu MP, Liu ZQ, Wu Y, Hu J, Gong WR (2008) Occurrence and comprehensive prevention and control measures in Jiangsu province of woolly apple aphid. Jiangsu Agricultural Science 6:128–129
3. Feng YQ, Wang JL, Zong SX (2014) Review of insects overwintering stages and cold-resistance strategies. Chin Agric Sci Bull 30(9):22–25
4. Folch J, Lees M, Stanley GHS (1957) A simple method for the isolation and purification of total lipids from animal tissues. J Biol Chem 226(1):497–507
5. Gontijo LM, Cockfield SD, Beers EH (2012) Natural enemies of woolly apple aphid (Hemiptera: Aphididae) in Washington state. Environ Entomol 41(6):1364–1371