Abstract
The casebearer, Chlamisus cribripennis (LeConte), has caused serious damage to lowbush blueberry in Nova Scotia since 1962. Both larval and adult stages are phytophagous and in heavily infested fields many of the plants are killed back to ground level. The species has 1 generation a year and overwinters as an adult. Eggs are laid about the middle of June and hatch in late June. The larvae pass through 3 instars and pupate in late July. The adult stage is reached in 4-5 weeks and feeding by the beetles continues until late October or early November. Effective control was attained with a single application of azinphosmethyl, carbaryl. Shell SD-8447 (2-chloro-1-(2,4,5-trichlorophenyl) vinyl dimethyl phosphate), Imidan® (O, O-dimethyl S-phthalimidomethyl phosphorodicrationthioate), and diazinon. Carbaryl dust also was effective. One application of any of these materials at the end of blossoming period (June 30) was sufficient.
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