The cumulative action of effective temperatures above the developmental threshold ( 15 ℃) during the borer's overwintering period was a major factor affecting diapause termination in the borer. The total effecive temperatures for the borer population were about 267.5 day-degrees.

  • 15℃以上的有效温度的累积作用是滞育解除的主导因子,其群体临界有效积温约为267.5日度。

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