微生物杀菌剂及其混配剂防治水稻纹枯病的田间药效试验

对微生物杀菌剂及其混配剂对水稻纹枯病进行田间防治试验,结果表明枯草芽孢杆菌10亿/g可湿性粉剂、井冈霉素·蜡质芽孢杆菌12.5%可湿性粉剂对水稻纹枯病有较好的防治效果。在发病初期施药,枯草芽孢杆菌10亿/g可湿性粉剂1500g/hm2防效为75.4%,产量增幅21.5%;井冈霉素·蜡质芽孢杆菌12.5%可湿性粉剂2880g/hm2防效为83.89%。可以作为井冈霉素的替代产品,进行推广应用。

Effects of Microorganism Fungicides and Their Mixtural Formulations for the Control of Rice Sheath Blight Disease Caused by Rhizoctonia solani

The effects of microorganism fungicides and their mixtural formulations for the control of rice sheath blight were studied. The field trial results showed that bacillus subtilis and mixture of jingangmycin and bacillus cereus were very effective to control rice sheath blight. The suitable dosage was1 500g/hm2 for the bacillus subtilis, its control effect was 75.4% , the increase of output was 21.5% . The suitable dosage was 2 880g/hm2 for the mixture of jingangmycin and bacillus cereus, its control effect was 83.89%.The spraying time was at the early stage of the rice sheath blight. these fungicides could be extended and applied instead of jingangmycin.