Position: Home > Articles > The Biological Activity of JS-B against Phytophthora capsici
Agrochemicals
2010,49
(1)
74-76
蛇床子素结构修饰物JS-B对辣椒疫霉生物活性
作 者：
王春梅;关巍;刘志恒;房舒;陈浩;蔡春;石志琦
单 位：
江苏省农业科学院食品质量安全与检测研究所;南京理工大学;沈阳农业大学植物保护学院
关键词：
蛇床子素结构修饰物;辣椒疫霉;生物活性
摘 要：
对蛇床子素结构修饰物JS-B的生物活性进行了研究。室内生测结果表明:JS-B对辣椒疫霉菌丝干重和游动孢子萌发的抑制中浓度(EC50)分别为43.74、86.03mg/L。盆栽试验表明:JS-B处理对辣椒疫病有一定预防和治疗效果。根系对JS-B具有一定的吸收性,1000mg/LJS-B灌根处理,防效达67.16%。用400mg/L的JS-B喷雾处理辣椒幼苗,分别在施药后1、3、8d接种辣椒疫霉的游动孢子,其对辣椒疫病的防效分别为71.95%、61.90%和66.72%,与阳性对照药剂烯酰吗啉相当,说明JS-B在防治辣椒疫病中具有一定的持效期。
译 名：
The Biological Activity of JS-B against Phytophthora capsici
作 者：
WANG Chun-mei1, GUAN Wei1,2, LIU Zhi-heng2, FANG Shu1,2, CHEN Hao1, CAI Chun3, SHI Zhi-qi1(1.Institute of Food Safety, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; 2.Collage of Plant Protection, Shenyang Agriculture University, Shenyang 100161, China; 3.Nanjing University of Science and Technology, Nanjing 210094, China)
关键词：
modifi ed osthol derivative; Phytophthora capsici; biological activity
摘 要：
Antifungal activity of JS-B, a kind of modified osthol derivative, was investigated. The EC50 values of JS-B inhibiting mycelial dry weight and zoospore germination of Phytophthora capsici were 43.74 and 86.03 mg/L, respectively. JS-B showed some protective and curative efficacy in controlling pepper blight to some extent under pot experiment. JS-B could be absorbed by the roots of pepper. The control efficacy value of JS-B applied at the concentration of 1 000 mg/L through soil drench, was 67.16%. The control efficacy of JS-B against pepper blight, when applied 1, 3 and 8 d at the concentration of 400 mg/L before inoculation with zoospore suspension of P. capsici, were 71.95, 61.90 and 66.72%, respectively. The effect of JS-B was correspond with dimethomorph. It indicated that JS-B had some persistence activity against pepper blight.
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