桑蚕血液型脓病的鉴别与防治技术

Identification and Control Technology of Nuclear Polyhedrosis

桑蚕血液型脓病是对桑蚕生产危害最严重的一种疾病,此病的传染力、耐药性、致病力都特强。传染途径除食下传染和创伤传染之外,也可与很多种类昆虫交叉感染发病。对该病要以防为主,做到养前、养中、养后彻底消毒,杜绝病原。在幼虫期可采用蚕用脓病灵预防,取药10 mL兑水1 000 mL稀释后,均匀喷洒在10 kg桑叶上,叶表稍干无水迹后喂蚕。4龄起蚕1次,5龄起蚕后隔日1次;采用含有效氯0.3%～0.5%的漂白粉澄清液、1%的新鲜石灰澄清液、消特灵1代主剂125 g,加水5 kg,浸渍桑叶或喷洒桑叶进行消毒,叶表稍干无水迹后喂蚕,可有效的预防该病的发生。

Nuclear polyhedrosis has extra strong of infectivity, drug resistance and pathogenieity, which brings the most serious damage to silkworm production. Except oral infectivity and wound infection, the disease may be spred through cross infection with various insects. The control of this disease should stick to the principle of putting prevention first and thoroughly disinfecting in the whole process. ＂Longbingling＂ could be used to prevent nuclear polyhedrosis in larval stage, the concret method was that spraying 10 kg mulberry leaves with 10 mL＂Longbingling＂ dissolved in 1000 mL water, then these leaves were used to feed silkworm, fourth instar one time, and fifth instar one time in the second day. Mulberry leaves disinfected with bleaching solution containing 0.3% -- 0.5% of available chlorine, 1% fresh calcareous solution and the first generation ＂xiaoteling＂ with 125 g main agent dissolved in 5 kg water were used to feed silkworm, this could greatly cut down the oecurenee of silkworm disease.