陈宸, 张坤, 丁涛, 冯建国, 杨进, 贺振, 陈夕军. 24%丙硫 • 戊唑醇悬浮剂的研制及其对稻麦纹枯病的防治效果[J]. 农药学学报, 2021, 23(3): 578-586. DOI: 10.16801/j.issn.1008-7303.2021.0050
    引用本文: 陈宸, 张坤, 丁涛, 冯建国, 杨进, 贺振, 陈夕军. 24%丙硫 • 戊唑醇悬浮剂的研制及其对稻麦纹枯病的防治效果[J]. 农药学学报, 2021, 23(3): 578-586. DOI: 10.16801/j.issn.1008-7303.2021.0050
    CHEN Chen, ZHANG Kun, DING Tao, FENG Jianguo, YANG Jin, HE Zhen, CHEN Xijun. Development of prothioconazole + tebuconazole 240 g/kg SC and its control effect on rice sheath blight and wheat sharp eyespot in the field[J]. Chinese Journal of Pesticide Science, 2021, 23(3): 578-586. DOI: 10.16801/j.issn.1008-7303.2021.0050
    Citation: CHEN Chen, ZHANG Kun, DING Tao, FENG Jianguo, YANG Jin, HE Zhen, CHEN Xijun. Development of prothioconazole + tebuconazole 240 g/kg SC and its control effect on rice sheath blight and wheat sharp eyespot in the field[J]. Chinese Journal of Pesticide Science, 2021, 23(3): 578-586. DOI: 10.16801/j.issn.1008-7303.2021.0050

    24%丙硫 • 戊唑醇悬浮剂的研制及其对稻麦纹枯病的防治效果

    Development of prothioconazole + tebuconazole 240 g/kg SC and its control effect on rice sheath blight and wheat sharp eyespot in the field

    • 摘要: 丙硫菌唑是一种新型广谱三唑硫酮类杀菌剂。通过联合效力 (联合毒力) 测定、配方助剂筛选和悬浮剂理化性能指标检测,研制了丙硫菌唑与戊唑醇复配的悬浮剂,并测定了其对水稻、小麦纹枯病的防治效果。结果表明:丙硫菌唑与戊唑醇质量比为2 : 1时对稻麦纹枯病菌具有增效作用,联合效力系数 (共毒系数) 分别为1.91和1.92;24%丙硫 • 戊唑醇悬浮剂最佳配方 (质量分数) 为:16.0%丙硫菌唑、8.0%戊唑醇、4.0% 分散剂Featdis SCP、3.0% 润湿剂EFW、0.2%黄原胶、1.0%硅酸镁铝和4%乙二醇,水补足至100%。产品经过(54 ± 2) ℃热贮14 d后,悬浮率95.2%,pH值6.9,平均粒径0.71 μm,析水率2.3%,持久起泡性小于25 mL;(0 ± 2) ℃冷贮7 d后,悬浮率94.8%,pH值7.1,平均粒径0.87 μm,持久起泡性小于25 mL,黏度在200~600 mPa·s之间。田间防效测定结果表明,24%丙硫 • 戊唑醇悬浮剂对水稻、小麦纹枯病均有较好防效,田间施用量 (有效成分) 210 g/hm2和150 g/hm2时,防效分别达89.01%和86.26%。

       

      Abstract: Prothiconazole, a new kind of broad spectrum triazolthione fungicide, was used to develop the suspension concentrate (SC) compounding with tebuconazole. The results of combined virulence determination, adjuvant system screening and physical and chemical properties detection showed that the ratio of prothioconazole to tebuconazole 2 : 1 had high combined virulence against Rhizoctonia solani and Rhizoctonia cerealis, the pathogen of rice sheath blight and wheat sharp eyespot, with the co-toxicity coefficients of 1.91 and 1.92, respectively. The reasonable formula of prothioconazole + tebuconazole 240 g/kg SC was prothioconazole 16.0%, tebuconazole 8.0%, Featdis SCP 4.0%, EFW 3.0%, xanthangum 0.2%, aluminum-magnesium silicate 1.0%, elycol 4.0%, and water up to 100%. After the product was stored at (54 ± 2) ℃ for 14 d, its characters were as follows: suspension rate 95.2%, pH value 6.9, average particle size 0.71 µm, water extraction rate 2.3%, and long-lasting forming ability less than 25 mL. After being stored at (0 ± 2) ℃ for 7 d, its characters were as follows: suspension rate 94.8%, pH value 7.1, average particle size 0.87 µm, long-lasting forming ability less than 25 mL, and viscosity between 200 mPa·s and 600 mPa·s. The field tests indicated that prothioconazole + tebuconazole 240 g/kg SC had good control effect on rice sheath blight and wheat sharp eyespot, and the control effect reached 89.01% and 86.26% at 210 g a.i/hm2 and 150 g a.i/hm2, respectively.

       

    /

    返回文章
    返回