纹霉清及其复配剂防治水稻纹枯病试验研究

A Preliminary Study on the Control Effect of Wenmeiqing(validamycin) and Its Mixture to Rice Sheath Blight Disease Caused by Rhizoctoni solani

研究了纹霉清及其复配剂防治水稻纹枯病的防治效果。结果表明：４０ ％ 纹霉清ＷＰ、２０ ％纹利ＳＣ和１２－５％ 纹益ＳＣ１０ 天后的防效分别为７６－６５ ％ 、７０－３１％ 和９１－１２％ ，总体防效均在６０ ％以上，适宜剂量为７５ｍｌ／６６７ｍ２ ，其防效与井冈霉素的防效相当。

The control effect of Wengmeiqing(validamycin) and its mixture on rice sheath blight disease was tested in field.It is very effective on rice sheath blight.The control effect of 40% Wenmeiqing,20% Wenli (a mixture of validamycin and carbendazim)SC and 12.5% Wenyi(a mixture of validamycin and triadimefon) SC reached 76.65%,70.32% and 91.12% after 10 days with 75g/667m 2,respectively.The effect was sustained for over 20 days.The control effect was equivalent to the effect of validamycin.