诱导水稻抗稻瘟病的前胡诱抗剂应用技术研究初探

The Application Technology of Botanical Elicitor from Common HogfenneI Root against Rice Blast

水稻稻瘟病是世界性的重要病害,植物源诱抗剂前胡能提高水稻对稻瘟病菌的免疫力,对稻瘟病有较好的防控效果。本试验采用普通喷雾法,研究了WS-16卫士型喷雾器和工农16型喷雾器两种不同的器械施药时,前胡水乳剂对稻瘟病的防控效果,药液量为40 kg/667m2,施药时使水稻叶片正反两面受药均匀。结果表明:15%前胡水乳剂对稻瘟病的防治效果优于前胡水煮液和前胡原粉,WS-16卫士型和工农16型喷雾器喷施15%前胡水乳剂150倍液药后30 d的防效分别为80.09%和72.54%,药后67 d的增产率分别为5.93%和3.61%,效果均稍低于对照药剂三环唑和稻瘟灵。采用两种不同的施药器械喷施前胡水乳剂,其对稻瘟病的防效存在显著差异性,但对水稻的增产率无明显差异。

Rice blast is a worldwide disease. Botanical elicitors have better control effects to rice blast because of improving rice immunity. This paper studied control efficiencies of two kinds sprayer equipment, the liquor amount was 40 kg/667m^2, both sides of rice leaves was contacted with the liquid. The results showed that, control efficiency of 15% Radix Peucedani coumarin was better than decoction and raw powder. With WS-16 type sprayer and GN-16 type sprayer, the control effects 30 days after application of 15% Radix Peucedani coumarin were 80.09% and 72.54%, respecitively, the rate of yield increase were 5.39% and 3.61%, respectively. Both control effects and rate of yield increase were lower than the control treatments. Two kinds of different spraying equipment had significant differences on control effects to rice blast, but the rate of rice yield had not significant difference.