RESISTANCE OF APPLE CULTIVARS TO TWO-SPOTTED SPIDER MITE, TETRANYCHUS URTICAE KOCH (ACARINA, TETRANYCHJDAE) PART L BIONOMY OF TWO-SPOTTED SPIDER MITE ON SELECTED CULTIVARS OF APPLE TREES

摘要

Apple cultivars investigated as new hosts for two-spotted spider mite, Tetranychus urticae Koch appeared to provide good environment for its development and reproduction. The best condkions for two-spotted spider mite development were on leaves of cultivars Novamac and Freedom with a net reproduction (Ro) 22.6 and 20.3 respectively, while the worst on cultivars Pioner and Primula with Ro 8.9 and 10.2 respectively.