Abstract:

Abstract: By means of black light lamp, sex attractants and field investigation, 25 species of pear insect pests that belong to 4 orders and 15 families in two registered export pear orchards in Hebei Province were invstigated. Occurrence regularity of 5 species major pear pests adults were studied and analyzed. The results showed that C. niponensis Walsingham had two obvious population peaks in one growing season, and occurred two generations in one year. G.molesta (Busck) had four population peaks. The population peak of A.corpulenta Motschulsky and H. parallela Motschulsky occurred from late in June to late in July and from early in July to the mid- August separately. The population peak of H. picus Fabricius occurred from late in June to the mid-August. Key words: registered export pear orchard；Pests species；Occurrence Regularity