PRELIMINARY ORCHARD TESTS ON CONTROL OF CODLING MOTH LARVAE BY A GRANULOSIS VIRUS

Abstract
Apple orchard tests in 1974, 1975, and 1976 showed that applications of granulosis virus reduced deep-entry damage by larvae of the codling moth, Laspeyresia pomonella (L.), to apple fruit at harvest by 55 to 96% compared with damage to fruit on nontreated check trees. Sting or shallow-entry injury was usually higher on virus-sprayed trees than on check trees presumably because larvae were killed by the virus soon after entry into the apple.

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