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2. Life Cycle<br />
In northern China, overwintered pupae<br />
begin to become moths as seedlings come up.<br />
Except for the 1st and 2nd , many generations<br />
overlap throughout the year. . They cause<br />
severe damage from May to June and Aug. to<br />
Sep., and even more severe damage from May<br />
to Jun.<br />
In Xinjiang, the most severe damage occurs<br />
from Jul. to Aug.<br />
In southern China, two damage peaks occur.
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