A Summary of Three Years' Experiments on the Control of Codling Moth in Southwestern Michigan1

Abstract

Tests over a three-year period are reported, and show that arsenate of lead sprays may be expected to control codling moth (Carpocapsa pomonella) in heavily infested Michigan orchards. Summer oil- emulsions and the summer oil-nicotine sulphate combinations have also resulted in good control under severe infestations. Following the use of lead arsenate sprays it was necessary to wash the fruit. This, it is shown, usually can be escaped if summer oils or the summer oil-nicotine sulphate combination is used for the summer brood sprays. It is shown that moth traps furnish valuable information which may be utilized in the spraying program. The importance of reducing codling moth population by supplementary control measures in severely infested orchards is emphasized.