RESISTANCE OF APPLE CULTIVARS TO TWO-SPOTTED SPIDER MITE, TETRANYCHUS URTICAE KOCH (ACARINA, TETRANYCHIDAE) PART II. INFLUENCE OF LEAF PUBESCENCE OF SELECTED APPLE CULTIYARS ON FECUNDITYOF TWO-SPOTTED SPIDER MITE

摘要

Number of hairs on abaxial leaf surface of 13 apple cultivars differed significantly. The most hairs per l cm2 on abaxial surface were on cvs. Lodel (2,578.3) and Jonafree (2,462.2). Leaves of cultiyars Antonówka and Novamac had the least number of hairs (1,054.4; 1,285.7; respectively). Correlation between number of hairs on abaxial leaf surface of investigated apple cultivars and Tetranychus urticae (Koch) female fecunditydecreased during l0 first days of their lives. Along with increased number of hairs, the fecundity of this species declined.