| 路 伟#*, 李 琳#, 李世奎, 赵娜娜.水溶性氟乐灵纳米制剂对向日葵列当的毒力及田间药效[J].植物保护,2019,45(3):237-240. |
| 水溶性氟乐灵纳米制剂对向日葵列当的毒力及田间药效 |
| Virulence determination and field efficacy evaluation of water solubletrifluralin nanoparticles against Orobanche cumana |
| 投稿时间：2018-05-24 修订日期：2018-07-23 |
| DOI：10.16688/j.zwbh.2018220 |
| 中文关键词: 氟乐灵 向日葵列当 毒力 消解动态 田间药效 |
| 英文关键词:trifluralin Orobanche cumana virulence degradation dynamic field efficacy |
| 基金项目:新疆维吾尔自治区自然科学基金(2015211B011) |
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| 中文摘要: |
| 向日葵列当Orobanche cumana是一种检疫性恶性寄生杂草。本研究采用透析法制备了一种水溶性氟乐灵纳米制剂(Tf OR CC), 评价其对向日葵列当的室内毒力和田间药效。种子发芽毒力测定结果表明:在独脚金内酯类似物GR24的诱导下, 用5 μg/mL Tf OR CC处理向日葵列当种子, 7 d后表现出良好的抑制发芽活性, 列当种子发芽率为28.5%, 与对照相比差异显著。消解动态试验表明, Tf OR CC消解半衰期比48%氟乐灵乳油延长6.56 d, 说明Tf OR CC具有一定的缓释作用。田间药效试验结果表明, 滴灌施用有效成分含量为75 g/667 m2Tf OR CC 45 d后, 向日葵列当寄生率为32.1%, 寄生强度为5.3, Tf OR CC制剂对向日葵列当的田间防效为36.3%。该方法可为向日葵滴灌施药技术防治向日葵列当提供科学依据。 |
| 英文摘要: |
| Orobanche cumana is a quarantine and malignant parasitic weed. A water soluble trifluralin nanoparticles (Tf-OR-CC) were prepared by dialysis method to evaluate virulence and field efficacy against O. cumana. The seed germination test showed that Tf-OR-CC nanoparticles had good effect on inhibiting the germination of O. cumana seeds at 5 μg/mL.After 7 days, the germination rate of the Tf-OR-CC was 28.5%, significantly lower than that of the control. The degradation dynamic test showed that degradation rate of the half time of Tf-OR-CC nanoparticles was 6.56 days, longer than that of trifluralin 48% EC, indicating that Tf-OR-CC has a certain sustained release effect. Field trials demonstrated that parasitism rate of O. cumana was 32.1% and parasitic intensity was 5.3 after 45 days of drip irrigation with 75 g/667 m2 Tf-OR-CC nanoparticles, significantly lower than that of the control, and the efficacy of Tf-OR-CC nanoparticles against O. cumana was 36.3%. The method can provide scientific basis for controlling O. cumana by drip irrigation. |
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