No abstract

No abstract

Can. Ent. 108: 1275Ent. 108: -1280Ent. 108: (1976 Eunoa vernalis, allied to Euxoa olivia (Morrison) and E u o a septentrionalis (Walker), is described from south-western United States and from Mexico. Adults and genitalia of the three species are illustrated.Euxoa olivia (Morrison) and Euxoa septentrionalis (Walker) have very distinctive male genitalia, easily distinguished from those of other known species of Euxoa by the presence of an enlarged fin-like structure on the right sacculus extension about one-third from the base. Other than this, however, the two species bear little resemblance to each other, either in maculation or in genitalia. An undescribed species of Euxoa, distributed in the south-westem United States and in Mexico, has genitalia which combine characters of both olivia and septentrionalis, including the presence of the fin-like structure on the right sacculus extension of the male. Unlike olivia and septentrionalis which fly in the fall, the undescribed species flies in the spring. All three species belong to the subgenus Euxoa as defined by Hardwick (1970). Euxoa olivia (Morrison)

Two leafroller spades are major pests of apple in British Columbia, Archips argyrospilus (Walker) and Archips rosanus (Linnaeus). Field observations showed that both species overwinter in the egg stage and that larval emergence times are similar. Experiments demonstrated that both species are susceptible to sprays of azinphos-methyl, diazinon, or trichlorfon applied at either the pink bud or petal fall stages. Dipel (Bacillus thuringiensis) failed to control larvae of either species.