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Production and field evaluation of codling moth granulosis virus for control of Cydia pomonella in the United Kingdom
Author(s) -
GLEN D. M.,
PAYNE C. C.
Publication year - 1984
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1984.tb05590.x
Subject(s) - codling moth , biology , larva , infectivity , horticulture , virus , pyriproxyfen , toxicology , biological pest control , veterinary medicine , virology , botany , medicine
SUMMARY Codling moth granulosis virus (Cp GV) was produced in larvae of Cydia pomonella reared on artificial diet. The average yield of virus (9 × 10 9 capsules/larva) was increased by raising the larvae on diet containing methoprene, a juvenile hormone analogue. In field trials in 1978 and 1979, one or two high‐volume applications of Cp GV at 7 × 10 10 capsules/litre achieved reductions in numbers of mature larvae and damaged fruit that were little different from those obtained by two applications of azinphos‐methyl. A field trial in 1980 showed that at concentrations of Cp GV ≥ 6 × 10 8 capsules/litre, damaged diminished slowly with increasing virus concentration. Following virus application in 1980, Cp GV infectivity was reduced by half in 3 days, but some activity persisted at least 4–8 wk after spraying. The results indicate that codling moth GV is an effective control agent particularly in reducing numbers of larvae and the more severe forms of fruit damage.