柞蚕微粒子病治疗药剂——“蚕锈康”的研究

Studies on Therapeutic Agent' Canxiukang' to Nosema pernyi Wen et Ding in Tussah

柞蚕微粒子病是影响柞蚕生产,特别是蚕种生产最严重的一种传染性疾病。对该病一直沿用法国巴斯德镜检法进行防治,对控制胚种传染起到重要作用。但柞蚕放养于野外,还有食下传染这一途径无法解决。为此,我们从1990年开始进行了柞蚕微粒子病治疗药剂的研究,经过近10年对80余种药剂的筛选,研制出了治疗药剂——“蚕锈康”,其使用浓度为0.10％～0.15％,吃药叶天数为12d;最佳用药时期为3龄前。“蚕锈康”对轻症胚种传染的治疗效果达77.7％,生产防治中的防效可达85％以上。该药具有对蚕安全,体色新鲜,增强蚕体抗病性,促进生长发育,增产效果明显等特点。

The tussah microsporidian disease is the most infectious disease, which is main cause for the loseof tussah cocoon production, especially the seed cocoon. The traditional control method for the pathogene ismicroscope inspection, which is effective for break the epidemic route via embryo. As the tussah larvae arereared outside in natural condition, there is also a possible epidemic route via feed. This research to preventthe microsporidian disease of tussah silkworm by farm chemicals began in 1990 and lasted for 10 years. Achemical 'Canxiukang' was developed to control this parasite disease after screening 80 kinds of chemicals.The applying concentration of the chemical is 0. 10% to 0. 15%; the leaves sprayed with the chemicalshould be fed to the larvae for at least 12 days; suitable stage of usage should be before 3rd instar of larva.The efficiency for the control of little epidemic via embryo is 77.7 % ; the efficiency in tussah cocoon pro-duction is over 85 % . This chemical has no side effect to silkworm, but increase the resistance to diseases,accelerate the growth and development of larvae, increase the cocoon yield and so on.