25%粉锈宁WP防治鸡蛋花黄锈病及其毒力研究  

Studyon the control of yellow rust in Plumeriarubra by 25% triadimefon WP and its toxicity

作　　者：杜小姣 杨秉建 叶光明 李博 黄慧青 文沛玲 

机构地区：[1]深圳市日昇园林绿化有限公司,深圳518000

出　　处：《草原与草坪》2014年第1期59-63,共5页Grassland and Turf

摘　　要：2013年6~7月,惠州鸡蛋花苗圃感染了黄锈病,发病率为93.33%,平均病情指数70.01；用0.1406 g/（10 m2）粉锈宁 WP 对锈病不同梯度病情指数进行防治,试验结果显示：防治效果与病情指数呈负相关关系（r =-96.93%）；用等比系列剂量进行防治试验,用几率值法的计算步骤求得 ED50=0.511（g）,其95%可信限为0.240~0.627 g,毒力回归方程为 y =5.5129＋1.7579 x ,据此,模拟了不同病情和不同防效的适宜用药量。Triadimefon WP （with dosage of 0.140 6 g/10 m2 ）was used to treat the yellow rust in P lumeria rubra infected by Coleosporium plumeria in a nursery in Shenzhen in 2013.Before treatment,the incidence rate was 93.33% and the average disease index was 70.01.The result indicated that the control efficiency showed a negative correlation with the disease index （r =-96.93%）.The ED50 was 0.5 1 1 g,and the 95% confidence lim-it was between 0.240 g and 0.627 g by using risk value method.The regression equation of toxicity was y =5.5 12 9＋1.757 9x .Accordingly,the optimum dose under different disease index and different control effi-ciency were simulated.

关 键 词：粉锈宁 WP 鸡蛋花 黄锈病 毒力 

分 类 号：S482.4[农业科学—农药学]