BY: CHEN Hou-de. Nl GUi-hua. WANG Zhang-ming. YUAN
Shu-zhong
The results showed that seven herbicides:fenoxapro-P-ethyl,butachlor,fluroxypyr,chlorsulfuron+isoproturon,tribenuron-methyl,dicamba and metsulfuronm-methyl had inhibition effects on the mycelia growth of Rhizoctonia cerealis with different degrees.Their EC50 was 7.03,26.38,67.20,88.05,199.35,1249.55 and 203.31 mg L-1 respecti6vely.Their inhibition rates of sclerotia formation were 86.3%,57.8%,74.5%,73.5%,71.6%,55.9% and 63.7% respectively and the inhibition rates to the pathogenicity of the pathogen were 44.83%,25.00%,14.66%,-1.00%,31.03%,35.34% and 25.86% respectively, at the concentration of 50 mg L-1.Microscopic observation indicated that the shape of mycelia treated with herbicides deformed in varying degrees.The herbicide fenoxaprop-P could delay the mycelia invading time and could affect the mycelia further penetrating and expending in vicinal cells.
The results showed that seven herbicides:fenoxapro-P-ethyl,butachlor,fluroxypyr,chlorsulfuron+isoproturon,tribenuron-methyl,dicamba and metsulfuronm-methyl had inhibition effects on the mycelia growth of Rhizoctonia cerealis with different degrees.Their EC50 was 7.03,26.38,67.20,88.05,199.35,1249.55 and 203.31 mg L-1 respecti6vely.Their inhibition rates of sclerotia formation were 86.3%,57.8%,74.5%,73.5%,71.6%,55.9% and 63.7% respectively and the inhibition rates to the pathogenicity of the pathogen were 44.83%,25.00%,14.66%,-1.00%,31.03%,35.34% and 25.86% respectively, at the concentration of 50 mg L-1.Microscopic observation indicated that the shape of mycelia treated with herbicides deformed in varying degrees.The herbicide fenoxaprop-P could delay the mycelia invading time and could affect the mycelia further penetrating and expending in vicinal cells.
Yangzhou pioneer chemical CO.,LTD
没有评论:
发表评论