摘要
柱花草炭疽病是严重影响柱花草生产的主要病害,药剂防治是减轻该类病害的有效措施。室内药效和盆栽药效试验结果表明:进口百菌清、杜邦克露和澳美加对炭疽菌菌落和分生孢子都有抑制作用,其中进口百菌清和杜邦克露的浓度与菌落抑制率呈正相关,药后6 d,百菌清1 000倍和杜邦克露700倍的抑菌率都达到100%,百菌清1 500倍与2 000倍的药效都达到95%以上,澳美加3个浓度的抑菌率都达到100%;3种药剂的浓度与孢子抑制率呈正关,药后36 h杜邦克露700倍、澳美加1 500倍完全抑制了孢子的萌发,进口百菌清1 000倍也达到90.56%的抑制率;盆栽药效试验中百菌清防效最高,药后7 d百菌清800倍防效为45.84%,杜邦克露600倍和澳美加1 000倍防效分别为33.67%、28.43%。杀菌剂盆栽试验的防效明显低于室内试验。供试的3种杀菌剂的防效从强到弱的顺序依次为百菌清、杜邦克露和澳美加。
Stylo santhes anthracnose is the main diseases to restrict the production of Stylo, and chemical control is still the most effective method to control the disease. The result of laboratory test and pot experiment showed that fungal colony growth and conidia germination of S. anthracnose were inhibited by Chlorothalnil 75%WP , Mancozeb 72%WP and Szomega 25 % WP. Inhibitory rate of colony were positive correlation with the concentration of Chlorothalnil and Mancozeb, reached 100% by 1000- fold diluted Chlorothalonil and 700-fold diluted mancozeb , reached more than 95% by 1500-fold and 2 000-fold diluted Chlorothalonil, and reached 100% by treatment three concentration of Szomega at six days sfter treatment. Inhibitory rate of conidia germination were positive correlation with the concentration of the three kind of Fungicides, reached 100% by 700-fold mancozeb and 1 500-fold Szomega, and reached 90.56% by 1 000-fold diluted Chlorothalonil at 36 hours after treatment. The relative control effect of Chlorothalnil was higher than that of two other Fungicides, was 45.84% by 800-fold diluted Chlorothalnil , 33.67% by 600-fold diluted mancozeb and 28.43% by 1 000-fold diluted Szomega in pot experiment at seven days after treatment. The relative control effect of Fungicide in laboratory test was obviously less than that in pot experiment. In this study, the relative control effect of Chlorothalni, Mancozeb and Szomega were from high to low order.
出处
《广东农业科学》
CAS
CSCD
北大核心
2009年第8期14-17,共4页
Guangdong Agricultural Sciences
基金
广东省自然科学基金博士启动项目(7301456)
仲恺农业工程学院校级人才引进基金项目(G2360238)
关键词
柱花草
炭疽菌
杀菌剂
防效
Stylosanthes
anthracnose
fungicide
control effect
