WANG Zijie,YANG Xiaohe,QIU Lei,et al.Control Effects and Function Mechanism of 20% Pendimethalin·Pyrazosulfuron-ethyl WP on Weeds in Transplanted Rice Field[J].HEILONGJIANG AGRICULTURAL SCIENCES,2023,(05):39-44.[doi:10.11942/j.issn1002-2767.2023.05.0039]
20%二甲戊灵·吡嘧磺隆WP对水稻移栽田杂草的防治效果及作用机理
- Title:
- Control Effects and Function Mechanism of 20% Pendimethalin·Pyrazosulfuron-ethyl WP on Weeds in Transplanted Rice Field
- 文章编号:
- 8
- Keywords:
- rice; chemical agents; weeds; control effect
- 文献标志码:
- A
- 摘要:
- 为探究20%二甲戊灵·吡嘧磺隆WP对稻田杂草的防治效果及对水稻的安全性，在水稻移栽35 d后，茎叶喷雾20%二甲戊灵·吡嘧磺隆WP 165，195，225和390 g·hm-2，以330 g·L-1 二甲戊灵EC 990 g·hm-2和10%吡嘧磺隆WP 22.5 g·hm-2为对照药剂，并设人工除草对照和清水对照。药后3和7 d通过目测观察法对水稻进行安全性评价，药后15 d调查株防效，30 d调查株防效和鲜重防效，收获期测量水稻产量。结果表明，药后15 d，除人工除草处理外（94.74%），处理4（20%二甲戊灵·吡嘧磺隆WP 390 g·hm-2）总株防效最高，为80.83%，其次为处理3（20%二甲戊灵·吡嘧磺隆WP 225 g·hm-2），总株防效为78.19%；药后30 d，处理4总株防效和总鲜重防效最高，分别为96.72%和95.66%，其次为处理3，分别为95.31%和94.18%。处理4增产效果最佳，增产率为21.54%，其次为处理3，增产20.31%。生产中，在水稻移栽35 d后，选用20%二甲戊灵·吡嘧磺隆WP 225~390 g·hm-2茎叶喷雾处理，可有效防治水稻移栽田稗草、雨久花、泽泻、慈菇和三棱草，且对水稻生产安全，水稻可增产20%以上。
- Abstract:
- In order to explore the efficacy and safety of 20% pendimethalin·pyrazosulfuron-ethyl WP on Echinochloa crusgalli， Monochoria korsakowii (L.) Beauv， Alisma orientale (Sam.) Juzep， and Carex phacota in the rice field, the experiment was designed as follows: 20% pendimethalin·pyrazosulfuron-ethyl WP of 165，195，225 and 390 g·ha-1， 330 g·L -1 pendimethalin EC of 990 g·ha-1， and 10% pyrazosulfuron-ethyl WP of 225 g·ha-1 were sprayed on the rice stems and leaves 35 d after transplantation. Water spraying and manual weeding were set as control. Safety evaluations were committed by visual observation 3 days and 7 days after herbicide spraying. Each individual-plant control efficiency of the five kinds of weed above and the total plant control efficiency were studied 15 days after herbicide spraying. Each individual-plant control efficiency， each fresh-weight control efficiency， the total plant control efficiency and the total fresh-weight control efficiency were researched 30 days after herbicide spraying. The highest total plant control efficiency existed in treatment 4(20% pendimethalin·pyrazosulfuron-ethyl WP of 390 g·ha-1)， 80.83%， followed by treatment 3 (20% pendimethalin·pyrazosulfuron-ethyl WP of 225 g·ha-1)， 78.19%， except for manual weeding 15 days after herbicide spraying. 30 days after herbicide spraying， the highest total plant control efficiency and total plant control efficiency emerged from treatment 4， 96.72% and 95.66%， followed by treatment 3， 95.31% and 9418%. Treatment 4 made the highest yield increase of 21.54%， followed by treatment 3， 20.31%. 35 days after transplantation， spraying 20% pendimethalin·pyrazosulfuron-ethyl WP on the stems and leaves is capable of preventing and controlling the occurrence of the 5 kinds of weeds above in the rice transplantation field with a positive safety evaluation. The yield would increase by over 20%.
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备注/Memo
收稿日期：2023-01-08