摘要
通过温室水稻苗期接种稻瘟病菌,测定烯丙苯噻唑(Probenazol)对水稻植株内防御酶活性的影响及其对稻瘟病的防治效果。结果表明:经过8%烯丙苯噻唑颗粒剂处理的水稻幼苗,PAL、POD和PPO三种防御酶的活性均大于对照,且随着药剂浓度的增大,酶活性越大;接菌后高浓度药剂处理的水稻防御酶活性的增长速率和高活性维持时间显著大于空白对照;300g/m2药剂(秧盘撒施剂量)对稻瘟病的防治效果为69.98%,对照药剂75%三环唑WP(每667m2施用26.7g,秧盘喷雾剂量)对稻瘟病的防效为76.73%。田间药效试验结果表明:300g/m2(秧盘撒施剂量)药剂对水稻叶瘟和穗瘟的防效分别为75.74%、66.26%,对照药剂75%三环唑WP(每667m2施用26.7g,水稻分蘖期和破口初期喷雾剂量)对水稻叶瘟和穗瘟的防效分别为82.05%、71.64%。
This study determined the effects of Probenazol on the activities of the defensive en- zymes in rice plants and control effect against rice blast. The enzyme activity of PAL, POD and PPO in rice was higher than that in the control, and the enzyme activity is greatly increased with the increase of drug concentration after the 8% Probenazol G dressing; the growth rate of the defense enzyme activities and the high activity duration for the treatment with high concentration Probenazol were significantly higher than those of the control after the inoculation of blast fungus. The control effect of 8% Pro- benazol with the concentration of 300 g/m2 （the seedling disc dose） against rice leaf blast was 69.98%, that of fungicides 75% Tricyclazole （26.7 g per 667 m2） on the rice blast was 76.73%. Furthermore, the control effect of 8% Probenazol G with different doses against rice blast field trials was conducted, the results show that the control effect of 300 g/m2 （the seedling disc dose） against rice leaf blast and panicle blast were 75.74% and 66.26% comparatively, those of fungicides 75% Tricyclazole （26. 7 g per 667 m2） against rice leaf blast and panicle blast were 82.05% and 71.64% respectively.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
2014年第4期60-65,共6页
Journal of Huazhong Agricultural University
基金
国家公益性行业(农业)科技专项(201203014)
江西省自然科学基金项目(2010GZN0102)
江西省农业科学院青年创新基金项目(2011-012)
关键词
烯丙苯噻唑
稻瘟病
防御酶
防效
Probenazol
rice blast
defense enzymes
control effects
