Abstract
Shortly after the oriental fruit moth (Grapholitha molesta Busck) was discovered in western New York in the summer of 1927, a survey of the infested area showed that indigenous parasites were effecting only very slight reductions in the population. Since no satisfactory control measures had been developed in the older areas of infestation, the utilization of parasites seemed the obvious undertaking. Macrocentrus ancylivorus Rohwer was imported from New Jersey in 1928 and liberated in the infested area of western New York. This paper summarizes the methods and results of that experiment in biological control.

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