th instar larvae 龄幼虫
4 th instar 四龄
th instar larva 龄幼虫
th-instar larvae 龄幼虫
th-instar nymph 五龄若虫
5 th-instar nymph 五龄若虫
The wing buds extend to 3 rd abdomen on 5 th instar.
五龄时翅芽延伸至腹部第三节。
The wing buds were found on the 4 th instar dorsal view.
四龄若虫由背面观具明显翅芽；
The change of protein content was about triple of the weight change during the 5 ~ th instar of silkworm, Bombyx mori, and the protein content was rapidly increased between the 3rd and 4th day.
家蚕幼虫5龄期间蛋白质含量的变化约为体重变化的3倍，整个蚕体的蛋白质含量在第3和第4天之间有一个明显的突增。
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