不同药剂对水稻穗颈瘟的田间防效试验

Field Control Effects of Different Fungicides on Rice Ear Neck Blast

水稻穗颈瘟是农业生产上的重要病害,为筛选出高效低毒的化学药剂,采用田间小区试验使用不同杀菌剂单剂和混合剂进行药效比较。结果表明:单剂9%吡唑醚菌酯微囊悬浮剂对水稻穗颈瘟的防治效果最高,为80.8%;75%三环唑可湿性粉剂和1%申嗪霉素悬浮剂次之,分别达到76.9%和76.7%。混剂中申嗪霉素225 ml/hm^2+吡唑醚菌酯487.5 ml/hm^2对水稻穗颈瘟的防效最高,为86.1%,显著高于三环唑352.5 g/hm^2的防效(80.4%)。申嗪霉素225 ml/hm^2+吡唑醚菌酯487.5 ml/hm^2对水稻穗颈瘟具有较好的防治效果。

[Aims]Rice ear neck blast were important disease in agricultural production,the study aimed to screen out new high efficiency and low toxicity fungicides.[Method]Field trials were used to compare the efficacy of rice ear neck blast with single and multiple fungicides.[Result]The result showed that,pyrazoxystrobin 9%CS has the highest control effect on rice ear neck blast were 80.8%,followed by tricyclazole 75%WP and phenazino-1-carboxylic acid 1%SC,reached 76.9%and 76.7%.Among the multiple fungicide,225 ml of phenazino-1-carboxylic acid+487.5 ml of pyraclostrobin·hm^-2 has the highest control effect on rice ear neck blast,reached 86.1%,higher than tricyclazole 75%WP was 80.4.[Conclusion]225 ml of phenazino-1-carboxylic acid+487.5 ml of pyraclostrobin·hm^-2 showed good control and safety to rice.