CN114431242B - 一种除草组合物及其应用 - Google Patents
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Abstract
本发明涉及一种除草剂组合物及其应用方法,组分A为具有如下结构式I所示的化合物:
Description
技术领域
本发明属于农用除草剂领域,涉及一种除草组合物及其应用。
背景技术
专利WO2016095768报道了如通式I所示的含异恶唑啉脲嘧啶类化合物:
通式I化合物具有很好的除草活性,可以有效地控制稗草、狗尾草、异型莎草、水莎草、马唐、荩草、苘麻、百日草、反枝苋、马齿苋、苍耳、龙葵、决明、野西瓜苗、野大豆等不同叶期的杂草,具有明显的除草效果。
不同的除草剂具有不同的杀草谱,虽然除草剂的混用是扩大杀草谱、降低使用量、防治抗性产生的一个有效途径;但,选择怎样的除草剂混用实现广谱性并非显而易见。
发明内容
本发明的目的在于提供一种除草组合物及其应用。
为实现上述目的,本发明的技术方案如下:
一种除草组合物,除草活性组分由组分A和组分B组成,组分A为具有如下结构式I所示的化合物;组分B选自PPO抑制剂类和/或激素抑制剂类除草剂中的一种或多种;所述组分A和组分B之间的重量比为1:100~100:1;
式I中:
R1选自甲基;
R2、R3可相同或不同,分别选自氢、氟或氯;
R4选自氢、氰基、甲基、乙基、正丙基、正丁基、异丙基、异丁基、叔丁基、三氟乙基、三氟甲基或CO2R6;
R5选自氢、甲基、乙基、叔丁基或三氟甲基;
R6选自氢、甲基、乙基、正丙基、正丁基、异丙基、异丁基、叔丁基、三氟乙基、烯丙基、炔丙基、甲氧基乙基、乙氧基乙基、甲基羰基氧基乙基、2-四氢呋喃亚甲基或3-四氢呋喃亚甲基。
优选所述的组合物,所述组分A为式Ⅰ所示的化合物,式I中:
R1选自甲基;
R2、R3可相同或不同,分别选自氢、氟或氯;
R4选自CO2R6;
R5选自氢、甲基、乙基、叔丁基或三氟甲基;
R6选自氢、甲基、乙基、正丙基、正丁基、异丙基、异丁基、叔丁基、三氟乙基、烯丙基、炔丙基、甲氧基乙基、乙氧基乙基、2-四氢呋喃亚甲基或3-四氢呋喃亚甲基。
组分B为丙炔氟草胺、乙羧氟草醚、嗪草酸甲酯、吡草醚、苯草醚、氯氟草醚、氟胺草酯、甲磺草胺、苯酮唑、唑草酮、苯嘧磺草胺、氟磺胺草醚、莠去津、毒莠定、绿草定、喹草酸、2甲4氯异辛酯氯、氯氨吡啶酸中的一种或多种;所述组分A和组分B之间的重量比为1:50~50:1。
进一步优选组合物,所述组分A为式Ⅰ所示的化合物,式I中:R1选自甲基;
R2、R3可相同或不同,分别选自氟或氯;
R4选自CO2R6;
R5选自氢、甲基、乙基或叔丁基;
R6选自氢、甲基、乙基、正丙基、正丁基、异丙基、异丁基或叔丁基;
组分B为丙炔氟草胺、嗪草酸甲酯、氯氟草醚、苯酮唑、唑草酮、苯嘧磺草胺、氟磺胺草醚、莠去津、毒莠定、喹草酸、2甲4氯异辛酯氯、氯氨吡啶酸中的一种或多种;
其中,组分A和组分B之间的重量比为1:25~25:1。
再进一步优选所述的组合物,所述组分A为式Ⅰ所示的化合物,式I中:R1选自甲基;
R2、R3可相同或不同,分别选自氟或氯;
R4选自CO2R6;
R5选自氢、甲基、乙基或叔丁基;
R6选自氢、甲基、乙基、正丙基、异丙基或正丁基;
组分B为唑草酮、苯嘧磺草胺、氟磺胺草醚、莠去津、2甲4氯异辛酯氯、氯氨吡啶酸中的一种或多种;
其中,组分A和组分B之间的重量比为1:10~10:1。
一种所述的除草组合物在防除杂草中的应用。本发明除草剂施用于存在或预期存在的不希望植被的场所,及可以选择性或非选择性地用于存在或预期存在的不希望植被的场所。具体是可以施用于不希望植被生存的土壤中、不希望植被的茎叶,或作物种植前或播种后出苗前的烧荒及耐受作物及非耐受作物的苗后处理。
所述的除草剂施用于非耕地、果园、橡胶园、闲置耕地、橡胶园、桉树林、杉树林、森林、防火道、草坪、铁路、公路、机场及仓库场所。
所述耐受和非耐受作物选自水稻、玉米、豆类作物、油菜、蔬菜、棉花、甜菜、小粒谷物、大豆、花生、甘蔗、向日葵、栽培作物、木本植物。所述的果园包括苹果园、桃园、葡萄园、梨园、茶园、桑园、柑橘园。所述不希望的植被包括禾本科杂草、阔叶杂草、莎草科杂草、藻类、蕨类和木本灌木。
本发明提出的组合物具有以下优点:
1、本发明所涉及的组分A除草剂活性具有较广的杀草谱,对禾本科杂草和阔叶杂草具有活性,但对不同的杂草具有不同的活性,进而选择对阔叶杂草的活性高于对禾本科杂草的活性的组分B除草剂,本发明将两类活性成分按特定比例混用,加强了对阔叶杂草的活性,具有非常明显的增效作用,同时扩大了杀草谱,提高了混合物对杂草的整体防除效果;
2、本发明除草剂扩大了施药适期,特别对较大叶龄杂草,持续抑制和防除作用增强;
3、本发明除草剂茎叶喷雾处理,可用于防除非耕地、果园、闲置耕地、橡胶园、桉树林、森林、防火道、草坪、铁路、公路、机场及仓库等场所的大多数杂草。
具体实施方式
本发明除草剂对禾本科杂草和阔叶杂草的协同增效作用可通过下列实施例作进一步说明,但本发明绝非仅限于此。其中,本发明除草剂活性组分为组分A和组分B,所述组分A为化合物A,组分B为PPO抑制剂类或激素抑制剂类中的一种。所有配比中的百分比均为重量百分比,活性组分以有效含量计算。
生物活性测定实施例
实施例采用本发明除草剂活性组分为化合物A分别与B复配对杂草的室内联合作用测定,A为具有通式I结构的化合物,其中,R1选自甲基,R2为F,R3为Cl,R4为CO2C2H5,R5为CH3;活性组分B为:唑草酮、苯嘧磺草胺、氟磺胺草醚、莠去津、2甲4氯异辛酯、氯氨吡啶酸中的一种。
通过室内盆栽试验,明确组合物对杂草的联合作用。
杂草培养方法为:将定量的杂草种子稗草、马唐、藜和反枝苋分别播于直径为7cm的装有营养土的纸杯中,播后覆土、镇压、淋水后在温室培养。禾本科杂草长至5~7叶期、阔叶杂草6~8叶期,茎叶喷雾处理,试验设3次重复。处理待药液自然风干,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。
药剂配制方法:供试药剂药剂样品均为原药,先用丙酮:二甲基甲酰(1:2,V/V)混合溶剂溶解,用1‰吐温80水配制成一定浓度的母液,然后按照试验方案配制不同剂量的处理液。
本发明采用Gowing法对提出的组合物的联合作用进行评价。
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。
表1组分A与唑草酮混用对禾本科杂草的联合作用
表2组分A与唑草酮混用对阔叶杂草的联合作用
表3组分A与苯嘧磺草胺混用对禾本科杂草的联合作用
表4组分A与苯嘧磺草胺混用对阔叶杂草的联合作用
表5组分A与氟磺胺草醚混用对禾本科杂草的联合作用
表6组分A与氟磺胺草醚混用对阔叶杂草的联合作用
表7组分A与苯达松混用对禾本科杂草的联合作用
表8组分A与苯达松混用对阔叶杂草的联合作用
表9组分A与莠去津混用对禾本科杂草的联合作用
表10组分A与莠去津混用对阔叶杂草的联合作用
表11组分A与2甲4氯异辛酯混用对禾本科杂草的联合作用
表12组分A与2甲4氯异辛酯混用对阔叶杂草的联合作用
表13组分A与氯氨吡啶酸混用对禾本科杂草的联合作用
表14组分A与氯氨吡啶酸混用对阔叶杂草的联合作用
试验结果表明,组分A分别与不同的组分B混用,在不同比例下对阔叶杂草藜、反枝苋和禾本科杂草稗草、马唐均表现出明显的增效作用。
Claims (4)
2.根据权利要求1所述的组合物,其特征在于:所述组分A为式Ⅰ所示的化合物,式I中:R1选自甲基;
R2为氟;
R3为氯;
R4选自CO2C2H5;
R5选自甲基;
组分B为唑草酮、苯嘧磺草胺、氟磺胺草醚、莠去津中的一种;
其中,组分A和组分B之间的重量比为1:25~10:1。
3.根据权利要求2所述的组合物,其特征在于:所述组分A为式Ⅰ所示的化合物,式I中:R1选自甲基;
R2为氟;
R3为氯;
R4选自CO2C2H5;
R5选自甲基;
组分B为唑草酮、苯嘧磺草胺、氟磺胺草醚、莠去津中的一种;
其中,组分A和组分B之间的重量比为1:10~10:1。
4.一种权利要求1所述的除草组合物的应用, 其特征在于:所述除草组合物在防除杂草中的应用。
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