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2. Life Cycle and Behavior<br />
3. Cotton<br />
3. Cotton leafworm Prodenia litura (斜纹夜蛾 斜纹夜蛾)<br />
Migratory insect, no diapause in winter;<br />
3-4 4 generations/year in northern parts, 4- 4<br />
5 in mid-stream mid stream of Yellow River, 5-6 5 6 in<br />
valley of Yangtse River, 6-9 6 9 in South;<br />
No overwintering individuals found in<br />
North;<br />
Most severe damage from Jul. to Oct.<br />
everywhere.
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