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思茅松微红梢斑螟Dioryctria rubella Hampson在云南省普洱市1年发生3代,世代重叠现象严重。幼虫具有转梢、转枝、转株为害习性,这与气候因素和寄主思茅松的生长状态密切相关。雨季幼虫以转株危害为主,危害率为35%～40%;旱季幼虫以转梢危害为主,危害率为90%～100%。第3代微红梢斑螟发生严重,造成的损失最大。这为综合控制微红梢斑螟对思茅松的危害提供重要的理论基础。
Dioscorea nipponense Dioryctria rubella Hampson occurs three generations a year in Pu’er City, Yunnan Province, and the generation overlap is serious. The larvae have the functions of turning, twigs and transplants, which are closely related to the climate factors and the growth status of the host Pinus kesiya. The rainy season larvae are mainly strain-changing, with the damage rate of 35% -40%. The dry-season larvae are predominated by turning-shoots and the damage rate is 90% -100%. The third generation of micro-red spotted borer occurred serious, causing the greatest loss. This provides an important theoretical basis for the comprehensive control of the damage of Pinus thunbergii to Pinus kesiyae.