Leafrollers (Lepidoptera) on berry crops in the Lower Fraser Valley, British Columbia
Keywords:
leafrollers, Lepidoptera, berry crops, <i>Operophtera bruceata</i>, <i>Acleris comariana</i>, <i>Rhopobota naevana</i>, <i>Choristoneura rosaceana</i>, <i>Spilonota ocellana</i>, <i>Archips rosanus</i>, <i>Cheimophila salicella</i>Abstract
A survey of tortricid leafrollers and other lepidopterous larvae with leafrolling habits on berry crops in the Lower Fraser Valley, B.C., revealed 16 species feeding on blueberry, four on cranberry, eight on raspberry and four on strawberry. The most abundant species were <i>Choristoneura rosaceana</i>, <i>Spilonota ocellana</i>, <i>Archips rosanus</i> and <i>Cheimophila salicella</i> on blueberry, <i>Operophtera bruceata</i>, <i>C. rosaceana</i> and <i>Acleris comariana</i> on rapsberry, <i>Rhopobota naevana</i> on cranberry, and <i>A. comariana</i> on strawberry. Some of the species have apparently not been reported previously as feeding on some of the berry crops. Four species previously reported as pests of berry crops in the Lower Fraser Valley were not found. Fields treated with insecticides early in the season, whether or not for leafrollers, had lower leafroller populations than untreated fields. There is no objective evidence that leafroller populations were sufficient to cause economic injury to any of the crops. Subjective observations confirm the economic importance of leafroller damage to cranberry and suggest that economic injury may occur on blueberry.
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