“蚕研2号”增丝剂是四川省农科院蚕桑研究所研制成功的一种蚕用增丝新型药剂。1982年我们于春秋两季在承德县于杖子大队进行了家蚕添食试验,均获得蚕体发育整齐、上簇快、茧形大、缩皱粗、茧层厚、产茧多、用桑省的经济效果。添食方法是:每支药剂兑水1市斤,供1张蚕种(约2万头蚕)使用。从三龄起,每天取部分 “Silkworm Research No. 2” silkworm silkworm Institute of Sichuan Academy of Agricultural Sciences has successfully developed a silkworm silk by a new type of silkworm. In 1982 we were in spring and autumn in Chengde County Zhangzizi brigade silkworm Tim feeding test, get silkworm body neat, fast on the cluster, cocoon-shaped, thick wrinkled, cocoon layer thick, cocoon production more with Sang The economic effect. Tim method is: each agent watered 1 kg, for a silkworm (about 20,000 silkworms) use. From the third age, every day to take part