氯氟吡啶酯在机插稻田杂草防除中的应用技术  

The Application Technology of Florpyrauxifen Control Weeds in Transplanted Rice Paddy

作　　者：朱友理 吴小美 何东兵 ZHU Youli;WU Xiaomei;HE Dongbing(Plant Protection and Plant Quarantine Station of Zhenjiang City,Jiangsu Zhenjiang 212009,China)

机构地区：[1]镇江市植保植检站,江苏镇江212009

出　　处：《现代农药》2021年第3期56-60,64,共6页MODERN AGROCHEMICALS

基　　金：江苏省农业三新工程项目(JATS[2019]329)。

摘　　要：通过田间药效试验比较了氯氟吡啶酯不同剂量对机插稻田主要杂草和不同叶龄稗草的防效,明确了2种助剂的增效减量作用。结果表明,水稻移栽后25 d,施用3%氯氟吡啶酯EC 600~1200 mL/hm^(2)对稗草、鸭舌草、水苋菜、陌上菜、合萌、空心莲子草等具有较好防效,对野荸荠防效中等,对千金子防效稍差,对丁香蓼不敏感。移栽后40 d施药,3%氯氟吡啶酯EC 900 mL/hm^(2)+10%氰氟草酯EC 2250 mL/hm^(2)对稗草的株防效和鲜重防效比移栽后25 d施药的效果下降14.7%和6.6%。施药时加入助剂激健或高展,可保证氯氟吡啶酯+氰氟草酯减量25%而不减效,或在氯氟吡啶酯+氰氟草酯正常用量下提升防效2.11%~16.38%。前期封闭处理后,推荐3%氯氟吡啶酯EC 600 mL/hm^(2)+10%氰氟草酯EC 1500 mL/hm^(2)+激健105 mL/hm^(2),在水稻移栽后20~35 d使用背负式电动喷雾器作茎叶喷雾,用水量为450 L/hm^(2)。The control effects of florpyrauxifen on different species of weed and barnyardgrass with different leaf ages were compared and the synergism effect of the two auxiliaries were clarified through the field efficacy trials.The results showed that the control effect on darnyardgrass,duck tongue grass,ammannia baccifera,Lindernia procumbens,Aeschynomene indica L.and Alternanthera Philoxeroides was better by sprayed 600-1200 mL/hm^(2) of florpyrauxifen 3% EC at 25 d after transplanting of rice.The plant control effect and fresh weight control effect of florpyrauxifen+cyhalofop-butyl on barnyardgrass by sprayed at 40 d after transplanting of rice was 14.7% and 6.6% lower than that of 25 d after transplanting.The control effect of 25% reduction in florpyrauxifen+cyhalofop-butyl on weeds was not reduced,or the control effect was increased by 2.11% -16.38% under normal dosage of florpyrauxifen+cyhalofop-buty when synergist was added during florpyrauxifen+cyhalofop-butyl application,compared with the herbicide used alone.The above results suggested that the florpyrauxifen 3% EC and 1500 mL/hm^(2) cyhalofop-butyl 10% EC were mixed with synergist"ji jian"(105 mL/hm^(2)),then was applied with spraying-water 225-450 mL/hm^(2) by self-propelled boom sprayer or knapsack electric sprayer at 20-35 d after transplanting of rice.

关 键 词：氯氟吡啶酯 机插稻 助剂 防效 应用技术 

分 类 号：S451[农业科学—植物保护]