“灭蚕蝇1号”防治柞蚕饰腹寄蝇病应用方法再试验

通过对"灭蚕蝇1号"防治柞蚕饰腹寄蝇病应用技术方法的重新试验,结果初步表明,不同时期用药,防效差异显著,其中老眠起2日龄用药效果最高,校正防效为57.9%;不同使用浓度防效差异显著,0.25%质量分数的防效最高,为68.5%;从增加用药次数的试验效果看,4龄期用药,并不能提高防效。生产中使用"灭蚕蝇1号"防治柞蚕饰腹寄蝇病可采用二次用药法,即5龄起蚕2～3d进行第1次喷药,5龄起蚕6～7d进行第2次喷药。

Re-test of the Application Method of "Miecanyin"

The re-test of the application method of "Mie Can Ying" used to treat tussah silkworm disease caused by tachina fly(Blepharipa Ribialis Chao) was carried out.The preliminary results showed that there was significant difference on the prevention rate at different applied period with a corrective effect of 57.9% on 2nd day of 5th instar,and so was the effect with different concentrations and its corrective effect is 68.5% by 0.25% of "Miecanyin ? ".After increased the medication frequencies,the result indicated that the prevention rate hadn't increased on 4th instar.So it is suggested that the medicine should be sprayed twide,the first time is on 2nd or 3th day of 5th instar and the second is on 6th or 7th days of 5th instar.