D. valens lived through the winters mainly at elder larvae and mature larvae stage under the roots of Pinus tabulaeformis stumps and weak trees in most of areas infested.

• 结果显示，在我国红脂大小蠹各主要发生地，该害虫主要在油松伐桩、衰弱树和新死亡树的根部以大龄和老熟幼虫或少量成虫越冬。