The apple leaf-curling midge,Dasyneura maliKieffer, seasonal history, varietal susceptibility and parasitism 1955-58

摘要

During the 1955-56 and 1956-57 seasons at Palmerston North, the apple leaf-curling midge,Dasyneura maliKieffer, reached significant proportions. Infestation in 1957-58 was less than in the previous two seasons. There are normally five generations of the midge between early October and late April.