25%凯润乳油对香蕉黑星病的田间防效研究

Study on the Field Control Effects of 25% Cabrio EC Against Banana Black Spot

[目的]为在生产上合理施用25%凯润乳油提供科学依据。[方法]以巴西2号为供试香蕉品种,研究25%凯润乳油不同浓度处理对香蕉黑星病的田间防治效果。[结果]随着施药时间的延长,平均病指下降,防效提高,香蕉生长正常,未发生药害。25%凯润乳油1 000、1 500和2 000倍液对香蕉叶片黑星病的防效均显著好于25%敌力脱乳油,25%凯润乳油不同浓度处理间防效差异不显著。[结论]25%凯润乳油最佳施用浓度为1 500～2 000倍,最佳施药量为750 L/hm2。

[Objective] The aim was to provide the scientific basis for application of 25% Cabrio EC in the production.[Method] With Baxi 2 as tested banana variety,the field control effects of 25% Cabrio EC with different concentrations against banana black spot were studied.[Result] With the extension of spraying time,the average disease index reduced,the control effect increased,and banana grew normally,without any injury.25% Cabrio EC with 1 000,1 500 and 2 000 times liquid had the better control effects against banana black spot than 25% Tilt EC.The control effects of 25% Cabrio EC with different concentrations had no significant differences.[Conclusion] The optimum concentration of 25% Cabrio EC was 1 500 to 2 000 times liquid,and the best amount was 750 L/hm2.