摘要
近年来,在甘肃省定西市马铃薯产区发现一种新病害:马铃薯炭疽病。2009-2011年7-10月,对不同品种、不同栽培措施以及不同土壤类型的马铃薯种植地块炭疽病发生情况进行了调查,定西市马铃薯炭疽病平均发病率高达12.6%,‘黑美人’、‘克新1号’和‘新大坪’发病率都高于50%,其中,地膜栽培发病率高于露地,沙质土壤高于黏土。为了有效控制炭疽病,本研究在室内选取7种杀菌剂,采用生长速率法进行药效评价。结果表明:75%肟菌.戊唑醇可湿性粉剂、250g/L嘧菌酯悬浮剂、25%溴菌腈可湿性粉剂3种杀菌剂的EC50较低,分别为5.039 3、5.448 3g/mL和5.538 6g/mL;其次是23%络氨铜水剂、80%百菌清可湿性粉剂、10%苯醚甲环唑水分散粒剂,EC50分别为6.082 8、6.300 8、6.884 9g/mL;EC50最大的是70%丙森锌可湿性粉剂,其值为9.200 3g/mL。
Recently,a new potato anthrax disease had been discovered in Dingxi City in Gansu Province.Occurrence of the disease in potato plots with different varieties,soil cultivation and soil types were investigated during July—October from 2009 to 2011.The results showed that the average incidence of potato anthrax was 12.6%,in which the incidences of ＇Black Beauty＇,＇Kexin No.1＇ and ＇New Daping＇ were more than 50%.The incidence of potato anthrax with plastic film mulching cultivation was higher than that with outdoor cultivation,and sand soils was higher than clay＇s.The mycelial linear growth rate method was used to determine the toxicity of 7 fungicides to C.coccodes causing the potato black dot in the laboratory.The results showed that the median effective concentration（EC50） of 75% trifloxystrobin·tebuconazole WP,250 g/L azoxystrobin SC and 25% bromothalonil WP were 5.039 3,5.448 3 and 5.538 6 g/mL,respectively,followed by 23% cuaminosulfate AS,80% chlorothalonil WP,and 10% difenoconazole WG.Their EC50 values were 6.082 8,6.300 8 and 6.884 9 g/mL,respectively;the EC50 of 70% propineb WP was 9.200 3 g/mL.
出处
《植物保护》
CAS
CSCD
北大核心
2012年第5期162-164,共3页
Plant Protection
关键词
马铃薯
炭疽病
病害发生
杀菌剂
生长速率法
potato
Colletotrichum coccodes
occurrence
fungicide
mycelial linear growth rate method
