三种新杀菌剂防治黄瓜霜霉病的研究

Three New Fungicides for the Control of Cucumber Downy Mildew

经1985—1986两年的试验研究,结果表明,20%硫代磷酰胺酯的防治效果为89.06%～89.81%;50%C—Ho—Cu500和Bo—10(生物农药)的防治效果在85%以上。20%硫代磷酰胺酯具有内吸传导、杀菌力强、且比对照减少病斑数目达61.77%～64.74%等特点。50%C—Ho—Cu500和Bo—10也是良好的保护剂。

The control of cucumber downy mildew with three new fungic-ides is proved to be 89.06%～89.81% in efficiency for 20% Thio—phospha-mide ester.The controlling effects of both 50% C—Ho—Cu 500 and Bo—10(biotic pesticide)come up to 85%.The experiment showed that 20% Thio—phosphamide ester was characterized by penetration translocation and str-ong disinfection and 61.77%～64.74% more reductive than disease spots ofcontrast.50% C—Ho—Cu 500 and Bo—10(biotic pesticide)were good pr-otectors as well.