Mature larvae usually leaves the victim or the back of the leaves, petioles, veins and weeds on a thin silkcocoon so pupation, pupal stage 5-15 days.
老熟幼虫一般在被害叶片背面或枯叶、叶柄、叶脉及杂草上吐丝做薄茧化蛹,蛹期5 - 15天。
2
Juxian is the largest silkworm production base, gaining the top position of the province for its silkcocoon in both quantity and quality for serial years.
莒县是山东省最大的桑蚕生产基地,蚕茧产量质量连续五年全省夺冠。
3
The utility model discloses a steam heating device for rereeling machines and silkcocoon reeling machines in silk industry, mainly composed of a steam input tube and a condensation returning tube.