Use of entomogenous fungi for the control of the peach fruit moth, Carposina niponensis.
A survey of the pathogens attacking Carposina niponensis, a pest of fruit trees in Japan, revealed that the only entomogenous fungus attacking this pest was Metarhizium anisopliae. In laboratory studies, C. niponensis was also susceptible to Paecilomyces fumosoroseus. Other fungi, including P. farinosus, Beauveria bassiana, B. brongniartii and Nomuraea rileyi were avirulent. The persistence of the conidia of 2 strains of P. fumosoroseus and 3 of M. anisoplae were studied in apple orchard soils in May 1985. Levels of more than 106 conidia/g of dried soil were maintained for more than a year. After 4 months, larval mortality was higher in soil infected with P. fumosoroseus than in soil containing M. anisopliae, but after 6 months this situation was reversed.