Occurrence of Phytoseiid mites (Acarina: Phytoseiidae) in apple orchards in south central British Columbia
Keywords:
Acarina, Phytoseiidae, apple orchardsAbstract
Sprayed and nonsprayed apple trees in the interior of British Columbia were sampled from 1967-70 for mites belonging to the family Phytoseiidae. <i>Typhlodromus occidentalis</i> Nesbitt and <i>T. columbiensis</i> Chant were the only species commonly found in sprayed orchards. <i>T. occidentalis</i> was more abundant. In nonsprayed orchards, <i>T. caudiglans</i> Schuster was practically the only phytoseiid found in the Okanagan and Similkameen valleys whereas it and <i>Phytoseius macropilis</i> (Banks) were the most common mites found in samples from higher rainfall districts bordering the Shuswap and Arrow Lakes. <i>T. pyri</i> Scheuten was less widely distributed than the above mites but was found in large numbers on nonsprayed trees in the Shuswap area and at Summerland in a dwarf apple orchard that is irrigated by overhead sprinklers.References
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