Activity of carbendazim, dimethachlon, iprodione, procymidone and boscalid against Sclerotinia stem rot in Jiangsu Province of China
Activity of carbendazim, dimethachlon, iprodione, procymidone and boscalid against Sclerotinia stem rot in Jiangsu Province of China
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DOI：
10.1007/s12600-009-0057-0
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发表时间：
2009-10
期刊：
影响因子：
1.4
通讯作者：
Hui-Xia Ma;Yu Chen;Jian-xin Wang;Wen-Yuan Yu;Zheng-He Tang;Changjun Chen;Ming-guo Zhou
中科院分区：
文献类型：
--
作者：
Hui-Xia Ma;Yu Chen;Jian-xin Wang;Wen-Yuan Yu;Zheng-He Tang;Changjun Chen;Ming-guo Zhou
多菌灵（MBC）是我国80年代以来广泛使用的防治菌核病的常规药剂，但由于多菌灵抗性的产生，导致了对菌核病的防治失败。结果表明，江苏省油菜菌核病菌对MBC的抗性普遍存在，在2006 - 2008年生长季采集的1786个菌株中，抗性频率为29.54%。抽样城市的耐药率不同，从3.1%到54.9%不等。田间抗MBC菌株的菌丝生长、菌核产生和致病性与野生型敏感菌株相当，这表明田间抗MBC菌株可能具有足够的寄生适合度来与田间MBC敏感菌株竞争。在体外药敏试验中，啶酰菌胺对S.菌核病菌比二甲酰亚胺类杀真菌剂（菌核净、异菌脲和腐霉利）更有效。处理50%啶酰菌胺（WG）125 g a.i. ha− 1的疗效与50%异菌脲（WP）600 g a. i. ha-1，优于6%菌核净690 g a. i. ha-1和50%腐霉利（WP）337.5 g a. i. ha-1，而MBC不能防治菌核病（防治效果仅为16.0%）。啶酰菌胺对油菜菌核病的防治效果最好。
Carbendazim (MBC) was widely used to control Sclerotinia stem rot routinely during the 1980s in China, but development of MBC resistance in the causal agentSclerotinia sclerotiorumled to control failures of this disease. In this study it was found that the MBC resistance inS. sclerotiorumpopulations was widespread throughout Jiangsu Province with a resistance frequency of 29.54% in the 1786 collected isolates during the growing seasons of 2006 to 2008. The resistance frequencies differed among sampled cities, ranging from 3.1% to 54.9%. The field MBC-resistant isolates showed comparable mycelial growth, sclerotia production and pathogenicity to the wild-type sensitive isolates, which suggested that the field MBC-resistant isolates might have sufficient parasitic fitness to compete with the field MBC-sensitive isolates in the field. In thein vitrosensitivity test, boscalid showed greater activity againstS. sclerotiorumthan dicarboximide fungicides (dimethachlon, iprodione and procymidone). The treatment 50% boscalid (WG) 125 g a.i. ha−1was comparable in efficacy to the treatment 50% iprodione (WP) 600 g a.i. ha−1, and better than other treatments of 6% dimethachlon (WP) 690 g a.i. ha−1and 50% procymidone (WP) 337.5 g a.i. ha−1, whereas MBC failed to control Sclerotinia stem rot (control efficacy only 16.0%). The most active agent for controlling Sclerotinia stem rot was boscalid in our study.