Effect of Larval Parasitization of the Oriental Fruit Moth on Infestation

Publisher Website
Google Scholar
Abstract
An expt. was carried out in peach orchards in New Jersey in 1938 to determine whether any definite correlation between parasitism of the oriental fruit moth larvae and subsequent infestation of ripe fruit could be detected. On representative trees, detailed records were made of 1st and 2d brood populations in infested twigs and immature drops and of the degree of parasitism. At harvest time counts were made of the ripe fruit infestation in Elberta or vars. ripening about the same time. A definite relationship was found between the amt. of parasitism and the amt. of infestation in ripe fruit. The records obtained ranged from an infestation of 4% in orchards having an average seasonal parasitism of more than 70% to an infestation of 30.4% in orchards having an av. seasonal parasitism of less than 60%. The reduction of infestation in orchards having high parasitism was sufficient to be of important commercial value.

This publication has 0 references indexed in Scilit: