42%寡糖·硫磺悬浮剂对西瓜白粉病的田间防效
Field Control Efficiency Study of a 42%Oligose-Sulfur Suspension Agent Against Watermelon Powdery Mildew(Erysiphe cichoracearum)
李相煌 1李涛 1张曼丽 1曾庆朝 1梁艳琼 2谭施北2
作者信息
- 1. 海南省植物保护总站 海南海口 571199
- 2. 中国热带农业科学院环境与植物保护研究所 海南海口 571101
- 折叠
摘要
为进一步明确 42%寡糖·硫磺悬浮剂对西瓜白粉病的防治效果,进行了田间防效试验.结果表明,42%寡糖·硫磺悬浮剂对西瓜白粉病具有良好的防治效果.第一次施药后 10 d 防效达 50.84%～65.94%,第二次药后 7 d 防效达62.03%～75.91%,第二次药后 14 d防效达 67.81%～80.77%.其中,高浓度(945.0 g/hm2)和中浓度(630.0 g/hm2)处理的防效优于对照药剂 5%氨基寡糖素水剂(52.5 g/hm2),低浓度处理(378.0 g/hm2)的防效则与对照药剂 5%氨基寡糖素水剂相当;高浓度处理的防效显著高于对照药剂 50%硫磺悬浮剂(1 525.0 g/hm2),中浓度处理的防效和对照药剂 50%硫磺悬浮剂相当.根据试验结果可知,在试验剂量范围内对作物安全,42%氨基·硫磺悬浮剂可以在西瓜上推广使用.推荐有效成分用药量为 630～945 g/hm2,每公顷用药液 750 L,隔 10 d喷一次,连续喷 2 次.
Abstract
A field efficacy test was conducted to clarify the ability of a 42%oligose-sulfur suspension to control watermelon powdery mildew.The results showed that a 42%oligose-sulfur suspension could control watermelon powdery mildew.The control effect reached 50.84%to 65.94%ten days after the first application,62.03%to 75.91%seven days after the second application,and 67.81%to 80.77%14 days after the second application.Among them,the control effect of high concentration(945.0 g·hm-2)and medium concentration(630.0 g·hm-2)was better than that of control agent 5%aminooligosaccharide water agent(52.5 g/hm2),and the control effect of low concentration treatment(378.0 g·hm-2)was similar to that of control agent 5%aminooligosaccharide water agent.The control effect of high-concentration was significantly higher than that of the 50%sulfur suspension agent(1 525.0 g·hm-2),and the control effect of medium-concentration treatment was similar to that of the control agent 50%sulfur suspension agent.The efficacy of the high-concentration treatment was significantly greater than that of the control agent.525.0 g·hm-2),and the efficacy of the medium-concentration treatment was comparable to that of the 50%sulfur suspension.According to the test results,it is safe for the crop within the test dose range,and a 42%oligose-sulfur sus-pension can be popularized for use on watermelon.The recommended dosage of the active ingredient is 630-945 g·hm-2,750 L of liquid per hectare,sprayed once every 10 d,and sprayed two times continuously.
关键词
寡糖·硫磺/西瓜/白粉病/防效Key words
oligose-sulfur suspension/watermelon/powdery mildew/control efficiency引用本文复制引用
出版年
2024
NETL
NSTL
万方数据