CN114532347A - 含苯嘧草唑的除草剂组合物及其应用 - Google Patents

含苯嘧草唑的除草剂组合物及其应用 Download PDF

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CN114532347A
CN114532347A CN202210045271.3A CN202210045271A CN114532347A CN 114532347 A CN114532347 A CN 114532347A CN 202210045271 A CN202210045271 A CN 202210045271A CN 114532347 A CN114532347 A CN 114532347A
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pyriminobac
metolachlor
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薛健
崔东亮
杨吉春
任新峰
杜辉
关爱莹
董垒
朱艳梅
刘长令
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Nantong Jiangshan Agrochemical & Chemicals Co ltd
Shenyang Sinochem Agrochemicals R&D Co Ltd
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Abstract

本发明公开了一种含苯嘧草唑的除草剂组合物，含有A、B两种活性组分，A为苯嘧草唑，B选自精异丙甲草胺、丁草胺、乙草胺中的一种，优选A、B采用1:1.5～10的质量百分比组分，该组合物可以配制成多种剂型。本发明适用于防除园林地和非耕地中的一年生及多年生杂草的应用，两种有效成分复配具有明显的增效作用，提高了防治效果，降低了农药使用量。

Description

含苯嘧草唑的除草剂组合物及其应用
本申请是申请号为2018112253305、名称为“含苯嘧草唑的除草组合物及其应用”的专利申请的分案申请。
技术领域
本发明涉及一种农用除草组合物复配技术。
背景技术
含有单一活性成分的除草剂品种在农业除草过程中存在不同程度的缺陷：连续使用容易产生抗药性，除草谱不够广，只能防除单子叶杂草或双子叶杂草，或者只能防除出苗的杂草或未出苗的杂草，不能兼防。通过两种或两种以上活性组分的复配，可以提高防效，减少有效成分的使用量，节约防除成本，延缓杂草抗药性的产生，延长药剂使用寿命，并减少对环境的污染。
申请号：201310267255X的发明公开了一种含有草铵膦和苯嘧磺草胺的除草组合物，有效成分为草铵膦、苯嘧磺草胺，其余为农药助剂。草铵膦和苯嘧磺草胺在除草组合物中的质量份数比为50：1～1：10，草铵膦和苯嘧磺草胺质量总和在除草组合物中的质量百分比为2%～80%。本发明除草组合物根据应用需要可制备成悬浮剂、油悬浮剂、水剂、可湿性粉剂或水分散粒剂中的一种，用于防除非耕地杂草。该组合物的防除非耕地杂草效果明显优于各单剂，减少用药量，延缓杂草抗药性。
苯嘧草唑，化学名：3-(2-氯-4-氟-5-(3-甲基-2,6-二氧-4-三氟甲基-3,6-二氢嘧啶-1(2H)-基)苯基)-5-甲基-4,5-二氢异恶唑-5-羧酸乙酯，结构独特是脲嘧啶与异恶唑结构的结合，与苯嘧磺草胺比较具有更好的除草活性，可以有效地防除园林地和非耕地中的一年生及多年生杂草。但是成本较高。
发明内容
本发明目的：
提供一种具有增效显著、低毒性、低成本的含苯嘧草唑的除草组合物。
本发明提及的含苯嘧草唑的除草剂组合物，含有A、B两种活性组分，另含有助剂、载体或稀释剂。A为苯嘧草唑，B选自精异丙甲草胺、丁草胺、乙草胺中的一种。
组分A和组分B的比例基于活性成分的质量份数比可为1:100～100:1。
所述的除草组合物加入助剂及赋形剂，按照本领域技术人员均知的生产工艺，制备成适合农业上使用的任意一种剂型（乳油、水乳剂、微乳剂、悬乳剂、可湿性粉剂或水分散粒剂），比较好的剂型有悬浮剂、水分散粒剂、可湿性粉剂、微乳剂。
所述的助剂及赋形剂包括表面活性剂、分散剂、润湿剂、乳化剂、崩解剂、稳定剂、增稠剂、粘合剂等及其他有益于有效成分在制剂中稳定和发挥药效的已知物质，都是农药制剂中常用或允许使用的各种成分，并无特别限定，具体成分和用量根据配方要求通过试验确认。
A与B的比例基于活性组分的质量分数比优选为1:1.5～10。
A与B的比例基于活性组分的质量分数比进一步优选为1:2～6。
本发明的另一目的，提供上述如除草组合物的一种用途，用于对园林地和非耕地中的一年生及多年生杂草的防除应用。
当除草组合物的用量是A:B=7.5～30:75～180ga.i./hm2时，应用于防除狗尾草具有明显的增效作用。
当B组分为精异丙甲草胺，采用用量为：A+B=15～22.5+90～135 ga.i./hm2，应用于防除杂草藜具有良好的防除效果。
本发明的有益效果在于：
1、两种有效成分复配具有明显的增效作用，提高了防治效果。
2、两种有效成分复配，作用机理独特不存在交互抗性，降低了农药使用量，从而降低了成本和减少了对环境的污染，有利于害虫抗性治理。
3. 当采用不同的B组分时，采用不同的A、B配比及单位面积施用量，用于去除某些特定的杂草，具有其它除草剂不具备的防除药效。本发明的推广应用有巨大的经济效益和社会效益。
具体实施方式
下面结合实施例对本发明的内容作进一步详述，实施例中所提及的内容并非对本发明的限定，材料配方选择可因地制宜而对结果无实质性的影响。在这些实施例中，除另有说明外，所有百分比均为重量百分比。
实施例一、剂型配置实施例：
35%苯嘧草唑·精异丙甲草胺水乳剂：
苯嘧草唑 5%；
精异丙甲草胺 30%；
150#溶剂油 10%；
EO-PO嵌段聚醚 3%；
乙二醇 3%；
消泡剂 0.2%；
去离子水补足至100%。
制备方法为：将有效成分苯嘧草唑和精异丙甲草胺用溶剂溶解后，投入乳化剂混合搅拌均匀形成均相液体，作为油相组分；将防冻剂乙二醇、消泡剂、去离子水混合搅拌均匀，作为水相部分。采用高速剪切机，将油相朝水相抽入，充分剪切，即得35%苯嘧草唑·精异丙甲草胺水乳剂。
实施例二、室内生物活性测定实施例：
本发明采用Gowing法对提出的组合物的联合作用进行评价。
Figure 551815DEST_PATH_IMAGE001
；
式中：
X — 除草剂组分A用量为P时的杂草防效；
Y — 除草剂组分B用量为Q时的杂草防效；
E0 — 除草剂组分A用量为P时的理论防效+除草剂组分B用量为Q时的理论防效；
E — 除草剂组分A与除草剂组分B按上述比例混用后的实测防效。
当E-E0>10%时，为增效作用；当E-E0< -10%时，为拮抗作用；当E-E0值介于±10%时，为加成作用。本发明通过室内盆栽试验，对除草剂活性组分A分别与B复配对杂草的室内联合作用进行测定，明确组合物对杂草的联合作用，其中：A为苯嘧草唑，B为精异丙甲草胺、丁草胺、乙草胺中的任一种中的一种。
杂草培养方法为：将定量的杂草种子苘麻和狗尾草分别播于直径为7 cm的装有营养土的纸杯中，播后覆土、镇压、淋水后在温室培养。苗后茎叶处理，于禾本科杂草长至5~7叶期、阔叶杂草6~8叶期处理；苗前土壤处理，于播种后第二天进行处理，苗后早期处理，于杂草播种后出苗前进行处理；试验设3次重复。处理后待药液自然风干，放于温室内按常规方法管理，根据杂草受抑制或死亡的情况，于处理后30天，进行目测防效调查。 表1苯嘧草唑与精异丙甲草胺混用对杂草的联合作用（苗前，另选B组分为异丙甲草胺做对比）：
Figure 655906DEST_PATH_IMAGE002
。
表2苯嘧草唑与丁草胺\乙草胺混用对杂草的联合作用（苗前）：
Figure 966802DEST_PATH_IMAGE003
。
试验结果（表1~表2）表明，在温室条件下，苯嘧草唑分别与酰胺类除草剂精异丙甲草胺、丁草胺、乙草胺混用，进行苗前土壤处理，具有明显的增效作用。
实施例三、田间除草活性测定实施例：
本发明还通过田间小区试验的方法，对含有除草剂活性组分A和活性组分B的制剂实例进行了对杂草的药效试验，明确组合物对非耕地杂草的防除效果。
针对不同制剂实例组分的不同，分别进行了苗前土壤处理、苗后早期和苗后茎叶喷雾处理，喷雾器械为新加坡利农HD400型背负式手动喷雾器（编号H17001），工作压力45Pa，喷射速率640 mL/分钟，可调锥形喷头（325787），喷头高度0.5米，喷幅0.85米，行走速度约16.7米/分钟，喷液量450升/公顷。
表3苯嘧草唑与酰胺类除草剂组合物对非耕地杂草的防效（苗前，另选B组分为异丙甲草胺做对比）：
Figure 362011DEST_PATH_IMAGE004
。
试验结果（表3）表明，含有除草剂活性组分A和活性组分B的制剂实例对大部分的阔叶杂草和禾本科杂草均有良好的防除效果。

Claims (4)

1.一种含苯嘧草唑的除草剂组合物，含有A、B两种活性组分，另含有助剂、载体或稀释剂，组合物的剂型为乳油、水乳剂、微乳剂、悬乳剂、可湿性粉剂或水分散粒剂，其特征在于：A为苯嘧草唑，B选自精异丙甲草胺、丁草胺、乙草胺中的一种；组分A和组分B的比例基于活性成分的质量份数比为1:1～100。
2.根据权利要求书1所述的含苯嘧草唑的除草剂组合物，其特征在于：A与B的比例基于活性组分的质量分数比为1:1.5～10。
3.根据权利要求书1所述的含苯嘧草唑的除草剂组合物，其特征在于：B选自精异丙甲草胺、丁草胺；A与B的比例基于活性组分的质量分数比为1:2～6。
4.一种如除草剂组合物的用途，其特征在于：采用权利要求书3所述的除草剂组合物，B组分为精异丙甲草胺，采用量为：A+B=15～22.5+90～135 ga.i./hm2，用于防除园林地和非耕地中的一年生及多年生杂草藜。
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