Journal
EXPERIMENTAL AND APPLIED ACAROLOGY
Volume 25, Issue 1, Pages 25-36Publisher
KLUWER ACADEMIC PUBL
DOI: 10.1023/A:1010685903130
Keywords
Neoseiulus californicus; Neoseiulus cucumeris; Tetranychus urticae; Phytonemus pallidus; strawberry; biological control
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Two species of Neoseiulus, N. californicus and N. cucumeris, showed potential for biocontrol of phytophagous mites on strawberry. N. californicus controlled Tetranychus urticae on potted strawberry plants in a gauze-sided glasshouse at temperatures comparableto early summer in the UK (8-20 degreesC). Both species of phytoseiid reducednumbers of the tarsonemid Phytonemus pallidus on potted strawberry plants under glasshouse conditions (15-23 degreesC). In several experiments reductions in the range of 71-81% in numbers of tarsonemid active stages and eggs, compared to non-release plants, were obtained. The importance of establishing a suitable predator: prey ratio at an earlystage was demonstrated in an experiment where an initial ratio of 1 N. cucumeris: 10 P. pallidus gave a greater degree of controlthan 1:20 or 1:40.
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