农抗702可湿性粉剂防治水稻病原真菌的药效评价  

Evaluation of Ag-antibiotic 702 WP against Pathogenic Fungi of Rice

作　　者：魏赛金[1] 徐佳[1] 程新[1] 周云[1] 涂国全[1] 

机构地区：[1]江西农业大学生物科学与工程学院,南昌市发酵应用重点实验室,江西南昌330045

出　　处：《江西农业大学学报》2011年第3期488-492,共5页Acta Agriculturae Universitatis Jiangxiensis

基　　金：国家自然科学基金项目(30960011、3107124);江西省自然科学基金项目(2009GZN0030);江西省科技支撑计划项目(2007BN14002)

摘　　要：研究和评价0.3%农抗702可湿性粉剂(WP)对水稻纹枯病、稻瘟病和稻曲病的作用效果及生防潜力。分别采用菌丝生长速率法、菌丝湿重法测定0.3%农抗702可湿性粉剂对水稻纹枯病、稻瘟病、稻曲病的毒力作用;采用盆栽实验观察农抗702可湿性粉剂对纹枯病的预防和治疗效果。0.3%农抗702可湿性粉剂对离体水稻纹枯病、稻瘟病和稻曲病的EC50、EC90分别为3.465 4μg/mL和14.122 4μg/mL,13.624 9μg/mL和40.725 9μg/mL,117.140 3μg/mL和380.522 1μg/mL。该粉剂对水稻感染纹枯病具有较强的保护作用,但基本上无治疗作用。结论:0.3%农抗702可湿性粉剂具有应用防治纹枯病,兼防稻瘟病和稻曲病的潜力,是潜在的井冈霉素替代性农药。To study and evaluate the inhibitory action of the 0.3% Ag-antibiotics 702 wetting power against Rhizoctonia solani,Magnaporthe grisea and Ustilaginoidea virens and its biological control potention on plant.The inhibitory action of the Ag-antibiotics 702 WP against all the above microorganisms were investigated by the determining mycelial growth rate method and the hyphae dry weight method.At the same time,a series of concentrations of the Ag-antibiotics 702 were sprayed on the booting rice to observe its prevention effect and therapy effect when the Rhizoctonia solani infected the booting rice.The result were Ag-antibiotics 702 WP had the features of restraining the mycelium growth.By in vitro experiment,the EC 50（μg/mL） and EC 90（μg/mL） of Ag-antibiotics 702 WP on Rhizoctonia solani,Magnaporthe grisea and Ustilaginoidea virens were as follows： Rhizoctonia solani： 3.465 4 and 14.122 4,Magnaporthe grisea： 13.6249 and 40.7259,Ustilaginoidea virens： 117.140 3 and 380.522 1.By internal experiment,Ag-antibiotics 702 WP possessed strong prevention effect on rice to resist Rhizoctonia solani infection,but basically no curing effect.The 0.3% Ag-antibiotic 702 WP was considered to be a potential biological control agent on Rhizoctonia solani as well as Magnaporthe grisea and Ustilaginoidea virens.It is a alternative pesticide for Validamycin.

关 键 词：0.3%农抗702可湿性粉剂 生物防治 水稻纹枯病 稻瘟病 稻曲病 

分 类 号：S482.2[农业科学—农药学]