CN117918363A - 一种含吡丙醚和环丙氟虫胺的杀虫组合物及其应用 - Google Patents
一种含吡丙醚和环丙氟虫胺的杀虫组合物及其应用 Download PDFInfo
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- CN117918363A CN117918363A CN202410087966.7A CN202410087966A CN117918363A CN 117918363 A CN117918363 A CN 117918363A CN 202410087966 A CN202410087966 A CN 202410087966A CN 117918363 A CN117918363 A CN 117918363A
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- pyriproxyfen
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
- A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/44—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton by a single or double bond, this nitrogen atom not being a member of a derivative or of a thio analogue of a carboxylic group, e.g. amino-carboxylic acids
- A01N37/46—N-acyl derivatives
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
- A01P7/00—Arthropodicides
- A01P7/04—Insecticides
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- Life Sciences & Earth Sciences (AREA)
- Plant Pathology (AREA)
- Environmental Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Wood Science & Technology (AREA)
- Pest Control & Pesticides (AREA)
- Health & Medical Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
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- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
本发明公开了一种含吡丙醚和环丙氟虫胺的杀虫组合物,所述杀虫组合物以吡丙醚和环丙氟虫胺为有效活性成分,其中,吡丙醚和环丙氟虫胺的重量比为1:30‑30:1。采用本发明的杀虫组合物能够有效防治农作物上的害虫,提高农作物的产量和品质。
Description
技术领域
本发明涉及农药技术领域,具体地,涉及一种含吡丙醚和环丙氟虫胺的杀虫组合物及其应用。
背景技术
吡丙醚(pyriproxyfen)又名蚊蝇醚,化学名称:4-苯氧基苯基(RS)-2-(2-吡啶基氧)丙基醚。吡丙醚是一种保幼激素类型的几丁质合成抑制剂,具有强烈的杀卵作用。吡丙醚还具有内吸性转移活性,可以影响隐藏在叶片背后的幼虫。对昆虫的抑制作用表现在影响昆虫蜕变和繁殖。对斜纹夜蛾的毒理试验表现,吡丙醚在血淋巴中高浓度的存留,加速昆虫前胸腺向性激素的分泌;另一方面,由于吡丙醚能使昆虫缺少产卵所需的刺激因素,抑制胚胎发育及卵的孵化,或生成没有生活能力的卵,从而有效的控制并达到害虫防治的目的。其可有效防治同翅目、缨翅目、双翅目和鳞翅目等害虫,如小菜蛾、白粉虱、介壳虫、蓟马等。另外,由于吡丙醚对昆虫的抑制作用主要表现在影响昆虫的蜕皮和繁殖,因此对生态环境十分安全。
环丙氟虫胺是一种低毒、高效、低残留的杀虫剂,分子式C28H17BrF12N2O2,相对分子重量721.34,CAS号为2375110-88-4,外观为白色固体粉末;其结构式如式I所示:
环丙氟虫胺是由南通泰禾化工股份有限公司自主研发的创制杀虫剂,化学结构新颖,作用机制独特,具有胃毒、触杀、内吸等作用,对靶标害虫具有优异的杀虫活性,与常用杀虫剂无交互抗性,对作物安全,对使用人员安全性高,环境相容性好,对稻田有益昆虫、鱼虾等水生生物安全性高。环丙氟虫胺的杀虫谱广、杀虫效果好、见效快,在防治农作物保护领域的有害生物和防控公共卫生害虫领域的有害生物方面具有优异的表现。可用于水稻、玉米、小麦、马铃薯、大豆、棉花、甘蔗、果树、蔬菜以及花卉、林木、园艺等多种农作物,防治虫害、螨、线虫等。环丙氟虫胺对人畜安全,卫生毒理学试验结果表明,其急性经口、急性经皮、急性吸入均是微毒级别,Ames试验结果为阴性。且环丙氟虫胺对环境生物友好,环境生物毒理学试验结果表明,其对水生生物低风险。
在农业生产的实际过程中,防治害虫最容易产生的问题是害虫抗药性的产生。不同品种成分进行复配,是防治抗性害虫很常见的方法。不同成分进行复配,根据实际应用效果,来判断某种复配是增效、相加还是拮抗作用。绝大多数情况下,农药的复配效果都是相加效应,真正有增效作用的复配很少,尤其是增效作用非常明显、共毒系数很高的复配就更少了。由此,筛选新的农药组合物,使其满足增效作用明显、共毒系数高的筛选要求,对于延缓农作物害虫的抗性、提高防治效果来说意义重大。
发明内容
本发明提供一种具有协同增效的杀虫组合物,该农药组合物能够有效防治农作物上的害虫,提高农作物的产量和品质。
为实现上述目的,本发明的技术方案为:
一种含吡丙醚和环丙氟虫胺的杀虫组合物,所述杀虫组合物以吡丙醚和环丙氟虫胺为有效活性成分,其中,吡丙醚和环丙氟虫胺的重量比为1:30-30:1。
优选地,吡丙醚和环丙氟虫胺的重量比为1:10-5:1。
更优选地,吡丙醚和环丙氟虫胺的重量比为1:5-5:1。
优选地,以上所述的含吡丙醚和环丙氟虫胺的杀虫组合物,还包括农药上可接受的助剂,其中,吡丙醚和环丙氟虫胺占组合物总重量的1-99%。
更优选地,所述助剂包括乳化剂、分散剂、润湿剂、防冻剂、稳定剂、增稠剂、溶剂、助溶剂和固体惰性载体中的一种或多种。
优选地,以上所述的含吡丙醚和环丙氟虫胺的杀虫组合物,制备成农药上可接受的剂型。
更优选地,所述剂型为悬浮剂、可分散油悬浮剂、微囊悬浮剂、微囊悬浮-悬浮剂、悬乳剂、可湿性粉剂或水分散粒剂中的一种。
本发明还进一步提供了以上所述的杀虫组合物在防治农作物害虫中的应用。
优选地,所述农作物为水稻、蔬菜或果树。
优选地,所述农作物害虫为水稻二化螟、跳甲、稻纵卷叶螟、甜菜夜蛾、小菜蛾、草地贪夜蛾、苹果小卷叶蛾和蓟马中的一种或多种。
本发明的含有吡丙醚和环丙氟虫胺的杀虫组合物,在防治农作物害虫方面表现出较优异的协同增效效果,且还具有共毒系数高的优势,能提高农作物的产量和品质,具有广阔的应用前景。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚,下面将对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。除非另有其它明确表示,否则在整个说明书和权利要求书中,术语“包括”或其变换如“包含”或“包括有”等等将被理解为包括所陈述的组成部分,而并未排除其它组成部分。
另外,为了更好的说明本发明,在下文的具体实施方式中给出了众多的具体细节。本领域技术人员应当理解,没有某些具体细节,本发明同样可以实施。在一些实施例中,对于本领域技术人员熟知的原料、方法、手段等未作详细描述,以便于凸显本发明的主旨。
本发明中百分含量在没有特别说明的情况下指重量百分含量。
本发明首先提供一种杀虫组合物,杀虫组合物以吡丙醚和环丙氟虫胺为有效活性成分,其中,吡丙醚和环丙氟虫胺的重量比为1:30-30:1。
优选地,所述杀虫组合物中吡丙醚和环丙氟虫胺的重量比为1:10-5:1。更优选地为1:5-5:1。
上述杀虫组合物中还包括农药上可接受的助剂,其中,吡丙醚和环丙氟虫胺占组合物总重量的1-99%。
优选地,所述助剂包括乳化剂、分散剂、润湿剂、防冻剂、稳定剂、增稠剂、溶剂、助溶剂和固体惰性载体中的一种或多种,还可以根据制备相关剂型的需要加入其他的助剂,例如,渗透剂等,但不限于此。
所述乳化剂可选自脂肪醇聚氧乙烯醚、脂肪胺聚氧乙烯醚、多芳基苯聚氧乙烯醚、多芳基苯聚氧乙烯醚甲醛缩合、聚氧乙烯脂肪酸酯、失水山梨醇脂肪酸酯、失水山梨醇聚氧乙烯醚、十二烷基苯磺酸钙、蓖麻油聚氧乙烯醚、脂肪酸酯类磺酸盐、脂肪醇醚磷酸酯盐、烷基酚聚氧乙烯醚磷酸酯、烷基丁二酸酯磺酸钠或烷基糖苷中的一种或至少两种的组合。
所述分散剂可选自烷基萘磺酸盐甲醛缩合物、木质素磺酸钠、烷基酚聚氧乙烯醚磷酸酯、苯乙基酚聚氧乙烯醚磷酸酯、苯基磷酸酯三乙醇胺盐、脂肪醇聚氧乙烯醚磷酸酯、脂肪醇聚氧乙烯醚琥珀酸单酯磺酸二钠盐、聚羧酸盐、脂肪醇聚氧丙烯聚氧乙烯醚、聚氧乙烯聚氧丙烯嵌段共聚物、聚乙烯醇、聚乙烯吡咯烷酮或羟基硬脂酸酯聚氧乙烯醚中的一种或至少两种的组合。
所述润湿剂可选自十二烷基硫酸钠、月桂醇硫酸钠、拉开粉、十二烷基苯磺酸钠、二异丁基磺酸钠和脂肪醇聚氧乙烯醚中的一种或至少两种的组合。
所述防冻剂可选自乙二醇、丙二醇、丙三醇、氯化钠或尿素中的一种或至少两种的组合。
所述稳定剂可选自异丙醇、烷基乙二醇醚、环氧化植物油、环氧化脂肪酸酯、丁基羟基茴香醚、二丁基羟基甲苯、乙酸或三乙醇胺中的一种或至少两种的组合。
所述增稠剂可选自黄原胶、硅酸镁铝、白炭黑、明胶、阿拉伯胶、聚乙烯醇、聚乙烯吡咯烷酮、纤维素衍生物、甲壳素、有机膨润土或海藻酸钠中的一种或至少两种的组合。
所述溶剂可选自水、丙酮、环己酮、甲基异丁酮、乙醚、乙二醇单丁醚、乙二醇二乙醚、甲醇、乙醇、丙醇、异丙醇、丁醇、异丁醇、异戊醇、辛醇、异辛醇、乙二醇、丙二醇、丙三醇、液化丙烷、液化丁烷、乙酸乙酯、乙酸丁酯、醋酸仲丁酯、N-甲基吡咯烷酮、异佛尔酮、六甲基磷酸叔胺、N,N-二甲基甲酰胺、癸酰胺、石蜡油、溶剂油、亚麻油、花生油、玉米油、芝麻油、棕榈油、大豆油或油酸甲酯中的一种或至少两种的组合。
所述助溶剂可选自乙二醇、丙二醇、正丁醇、甘油、环己醇、己醇、辛醇或甲基二甘醇中的一种或至少两种的组合。
所述固体惰性载体可选自硅藻土、凹凸棒土、黏土、高岭土、膨润土、海泡石、沸石、白炭黑、轻质碳酸钙、淀粉、硬脂酸镁、硬脂酸钠、滑石粉、微粉硅胶、甘露醇、可压性淀粉、羟丙基淀粉、糊精羟丙基甲基纤维素或交联聚维酮中的一种或至少两种的组合。
优选地,所述渗透剂可选自脂肪醇聚氧乙烯醚、烷基酚聚氧乙烯醚磷酸酯、烷基酚聚氧乙烯醚硫酸酯、氮酮、琥珀酸二异辛酯磺酸钠、磺化蓖麻油或有机硅中的一种或至少两种的组合。
本发明所述的杀虫组合物可以制备成农药上可接受的剂型。优选地,所述的剂型为悬浮剂、可分散油悬浮剂、微囊悬浮剂、微囊悬浮-悬浮剂、悬乳剂、可湿性粉剂或水分散粒剂中的一种。
本发明还进一步提供了以上所述的杀虫组合物在防治农作物害虫中的应用。所述农作物优选为水稻、蔬菜或果树。所述害虫优选为水稻二化螟、跳甲、稻纵卷叶螟、甜菜夜蛾、小菜蛾、草地贪夜蛾、苹果小卷叶蛾、蓟马中的一种或多种。
下面通过具体实施方式来进一步说明本发明的技术方案。本领域技术人员应该明了,所述实施例仅仅是帮助理解本发明,不应视为对本发明的具体限制。
以下实施例中原料没有特别说明的都可以从市场购买得到。
(一)药剂制备实施例(以下有效活性成分是指吡丙醚和环丙氟虫胺的组合,吡丙醚和环丙氟虫胺的重量比均为1:1)
药剂实施例1:40%吡丙醚·环丙氟虫胺悬浮剂
有效活性成分40%,分散剂聚氧乙烯聚氧丙烯嵌段共聚物5%,十二烷基硫酸钠2%,黄原胶0.5%,硅酸镁铝0.5%,有机硅消泡剂0.5%,乙二醇4%,水补足至100%。
药剂实施例2:10%吡丙醚·环丙氟虫胺可分散油悬浮剂
有效活性成分10%,脂肪醇聚氧乙烯醚12%,失水山梨醇聚氧乙烯醚3%,有机膨润土2%,油酸甲酯补足至100%。
药剂实施例3:20%吡丙醚·环丙氟虫胺微囊悬浮剂
有效活性成分20%(其中,游离活性成分重量分数占总活性成分重量分数的8%),聚氧乙烯聚氧丙烯嵌段共聚物5%,蓖麻油聚氧乙烯醚3%,黄原胶0.3%,硅酸镁铝0.5%,有机硅消泡剂0.2%,水补足至100%。
药剂实施例4:30%吡丙醚·环丙氟虫胺微囊悬浮-悬浮剂
有效活性成分30%(其中,吡丙醚以微囊形式存在,游离活性成分重量分数占总活性成分重量分数的8%),聚氧乙烯聚氧丙烯嵌段共聚物5%,蓖麻油聚氧乙烯醚3%,黄原胶0.3%,硅酸镁铝0.5%,有机硅消泡剂0.2%,水补足至100%。
药剂实施例5:15%吡丙醚·环丙氟虫胺悬乳剂
有效活性成分15%,聚氧乙烯聚氧丙烯嵌段共聚物5%,蓖麻油聚氧乙烯醚3%,溶剂油S-15030%,黄原胶0.3%,硅酸镁铝0.5%,有机硅消泡剂0.2%,水补足至100%。
药剂实施例6:80%吡丙醚·环丙氟虫胺可湿性粉剂
有效活性成分80%,聚羧酸盐5%,十二烷基硫酸钠3%,高岭土补足至100%。
药剂实施例7:60%吡丙醚·环丙氟虫胺水分散粒剂
有效活性成分60%,聚羧酸盐6%,十二烷基硫酸钠4%,可溶性淀粉2%,煅烧高岭土补足至100%。
(二)室内生测试验
本发明采用孙云沛(Sun Y-P)法,通过计算共毒系数(co-toxicity coefficient,CTC),评价本发明的杀虫剂组合物中两种活性成分的混用效果。
评价标准:当CTC≥120,表现为增效作用;当CTC≤80,表现为拮抗作用;80<CTC<120,表现为相加作用。
计算公式:
共毒系数(CTC)=[混剂实际毒力指数(ATI)/混剂理论毒力指数(TTI)]×100
混剂实际毒力指数(ATI)=(标准药剂的LC50/混剂的LC50)×100
混剂理论毒力指数(TTI)=A剂的TI×混剂有效成分中A的含量+B剂的TI×混剂有效成分中B的含量
毒力指数(TI)=(标准药剂的LC50/供试药剂的LC50)×100(把A剂、B剂中的一种作为标准药剂)
试验例1
试验靶标:水稻二化螟,室内饲养F1代三龄幼虫。
试验条件:温度:24-26℃,湿度:RH60-80%,光照为L:D=(14:10)h。
试验方法:参照《中华人民共和国农业行业标准NY/T1154.7-2006》,采用浸渍法。
药剂配制:本试验例中,A剂为吡丙醚原药(95%),B剂为环丙氟虫胺原药(98%),选择A剂作为标准药剂,将A剂和B剂分别以各自有效成分的重量为基准,配制成如下混剂:
混剂1(A:B=30:1);混剂2(A:B=20:1);混剂3(A:B=15:1);混剂4(A:B=10:1);混剂5(A:B=5:1);混剂6(A:B=2:1);混剂7(A:B=1:1);混剂8(A:B=1:2);混剂9(A:B=1:5);混剂10(A:B=1:10);混剂11(A:B=1:15);混剂12(A:B=1:20);混剂13(A:B=1:30)。
分别准确称取如上13种混剂,每种混剂均用丙酮配置成母液,并用蒸馏水将母液稀释成为具一定浓度梯度的系列药剂。
药剂处理:选取实验室培养的健壮一致的分蘖期水稻苗,连根挖取、洗净,剪成10cm长的带根稻茎,于阴凉处晾至表面无水痕备用。将准备好的稻茎在配置好的药液中浸渍30s,取出稍晾干,用湿脱脂棉包住根部保湿,外包保鲜膜置于试管中,每试管3株。挑选整齐一致的试验靶标用吸虫器将其移入试管中,每试管15头,管口用纱布罩住。以浸不含药剂的溶剂水溶液为空白对照,每一处理重复5次。处理48h后检查死虫数,分别记录总虫数和死虫数。
采用几率值分析的方法对数据进行处理。统计数据用DPS软件进行处理,求出每种混剂毒力回归线的LC50,并用孙云沛法算出共毒系数,结果见表1。
表1本发明杀虫组合物对水稻二化螟生物活性测试结果
供试药剂 | LC50(mg/L) | TI | ATI | TTI | 共毒系数(CTC) |
吡丙醚(A) | 42.24 | 100 | / | / | / |
环丙氟虫胺(B) | 22.65 | 186.49 | / | / | / |
混剂1(A:B=30:1) | 53.27 | / | 79.29 | 102.79 | 77.14 |
混剂2(A:B=20:1) | 43.35 | / | 97.44 | 104.12 | 93.58 |
混剂3(A:B=15:1) | 41.36 | / | 102.13 | 105.41 | 96.89 |
混剂4(A:B=10:1) | 39.17 | / | 107.84 | 107.86 | 99.98 |
混剂5(A:B=5:1) | 26.94 | / | 156.79 | 114.42 | 137.03 |
混剂6(A:B=2:1) | 19.33 | / | 218.52 | 128.83 | 169.62 |
混剂7(A:B=1:1) | 15.51 | / | 272.34 | 143.25 | 190.12 |
混剂8(A:B=1:2) | 16.85 | / | 250.68 | 157.66 | 159.00 |
混剂9(A:B=1:5) | 18.37 | / | 229.94 | 172.08 | 133.62 |
混剂10(A:B=1:10) | 23.75 | / | 177.85 | 178.63 | 99.56 |
混剂11(A:B=1:15) | 23.94 | / | 176.44 | 181.08 | 97.44 |
混剂12(A:B=1:20) | 24.74 | / | 170.74 | 182.37 | 93.62 |
混剂13(A:B=1:30) | 29.90 | / | 141.27 | 183.70 | 76.90 |
由表1可知,本发明杀虫组合物对水稻二化螟具有较好的防治效果,特别是吡丙醚和环丙氟虫胺重量比在1:5至5:1范围内具有很好的协同增效效果,在5:1、2:1、1:1、1:2、1:5时具有较高的共毒系数。
试验例2
实验靶标:甜菜夜蛾幼虫采自贵州省贵阳市小河区金竹镇的甘蓝田,用室内自种的未施药的甘蓝叶饲养3h,选取健康的3-4龄幼虫备用。
试验方法:参照《中华人民共和国农业行业标准NY/T1154.7-2006》,采用浸渍法。
药剂配制:同试验例1。
药剂处理:然后将甘蓝叶清洗并晾干,并剪成直径约8cm圆形叶片,分别置于各浓度的药液中,浸泡10s后取出晾干,放入直径9cm培养皿中。每皿接入实验靶标10头,每处理3次重复。接入48h后,调查死虫数,计算死亡率。
采用几率值分析的方法对数据进行处理。统计数据用DPS软件进行处理,求出每种混剂毒力回归线的LC50,并用孙云沛法算出共毒系数,结果见表2。
表2本发明杀虫组合物对甜菜夜蛾活性测试结果
供试药剂 | LC50(mg/L) | TI | ATI | TTI | 共毒系数(CTC) |
吡丙醚(A) | 39.65 | 100.00 | / | / | / |
环丙氟虫胺(B) | 25.49 | 155.55 | / | / | / |
混剂1(A:B=30:1) | 46.20 | / | 85.82 | 101.79 | 84.31 |
混剂2(A:B=20:1) | 40.92 | / | 96.90 | 102.65 | 94.40 |
混剂3(A:B=15:1) | 39.36 | / | 100.74 | 103.47 | 97.36 |
混剂4(A:B=10:1) | 36.85 | / | 107.60 | 105.05 | 102.43 |
混剂5(A:B=5:1) | 25.69 | / | 154.34 | 109.26 | 141.26 |
混剂6(A:B=2:1) | 19.42 | / | 204.17 | 118.52 | 172.27 |
混剂7(A:B=1:1) | 16.74 | / | 236.86 | 127.78 | 185.37 |
混剂8(A:B=1:2) | 17.48 | / | 226.83 | 137.03 | 165.53 |
混剂9(A:B=1:5) | 17.57 | / | 225.67 | 146.29 | 154.26 |
混剂10(A:B=1:10) | 21.84 | / | 181.55 | 150.50 | 120.63 |
混剂11(A:B=1:15) | 24.63 | / | 160.98 | 152.08 | 105.85 |
混剂12(A:B=1:20) | 26.82 | / | 147.84 | 152.90 | 96.69 |
混剂13(A:B=1:30) | 35.68 | / | 111.13 | 153.76 | 72.27 |
由表2可知,本发明杀虫组合物甜菜夜蛾具有较好的防治效果,特别是吡丙醚和环丙氟虫胺重量比在1:10至5:1范围内具有很好的协同增效效果,在5:1、2:1、1:1、1:2、1:5和1:10时具有较高的共毒系数。
试验例3
实验靶标:黄曲条跳甲成虫采集于福建省龙岩市十字花科蔬菜地,室内以新鲜未使用过任何农药的上海青叶片连续饲养72h后进行毒力测定。
试验条件:温度:24-26℃,湿度:RH60-80%,光照为L:D=(14:10)h。
试验方法:参照《中华人民共和国农业行业标准NY/T1154.7-2006》,采用浸渍法。
药剂配制:同试验例1。
药剂处理:采集新鲜未施用任何药剂的上海青叶片在药液中浸渍约15s后,取出于通风处自然晾干,置于生测瓶中接入虫龄大小一致的成虫,每个浓度3个重复,每个重复30头成虫用80目防虫网封口并置人工气候箱内,48h后检查黄曲条跳甲的死亡状况,以毛笔触之不动视为死亡,记录参试虫的死亡数。
采用几率值分析的方法对数据进行处理。统计数据用DPS软件进行处理,求出每种混剂毒力回归线的LC50,并用孙云沛法算出共毒系数,结果见表3。
表3本发明杀虫组合物对黄曲条跳甲活性测试结果
供试药剂 | LC50(mg/L) | TI | ATI | TTI | 共毒系数(CTC) |
吡丙醚(A) | 20.27 | 100.00 | / | / | / |
环丙氟虫胺(B) | 12.39 | 163.60 | / | / | / |
混剂1(A:B=30:1) | 21.86 | / | 92.73 | 102.05 | 90.87 |
混剂2(A:B=20:1) | 20.98 | / | 96.62 | 103.03 | 93.78 |
混剂3(A:B=15:1) | 18.63 | / | 108.80 | 103.98 | 104.64 |
混剂4(A:B=10:1) | 16.64 | / | 121.81 | 105.78 | 115.15 |
混剂5(A:B=5:1) | 12.49 | / | 162.29 | 110.60 | 146.74 |
混剂6(A:B=2:1) | 10.24 | / | 197.95 | 121.20 | 163.33 |
混剂7(A:B=1:1) | 8.43 | / | 240.45 | 131.80 | 182.44 |
混剂8(A:B=1:2) | 8.99 | / | 225.47 | 142.40 | 158.34 |
混剂9(A:B=1:5) | 8.65 | / | 234.34 | 153.00 | 153.16 |
混剂10(A:B=1:10) | 10.22 | / | 198.34 | 157.82 | 125.67 |
混剂11(A:B=1:15) | 12.63 | / | 160.49 | 159.63 | 100.54 |
混剂12(A:B=1:20) | 13.43 | / | 150.93 | 160.57 | 94.00 |
混剂13(A:B=1:30) | 15.04 | / | 134.77 | 161.55 | 83.42 |
由表3可知,本发明杀虫组合物对黄曲条跳甲具有较好的防治效果,特别是吡丙醚和环丙氟虫胺重量比在1:10至5:1范围内具有很好的协同增效效果,在5:1、2:1、1:1、1:2、1:5和1:10时具有较高的共毒系数。
(三)田间药效试验
试验共10个处理,即上述药剂实施例1-7的药剂(7种)和1个空白对照(即不施用药剂)、2个药剂对比例。2个药剂对比例如下:
药剂对比例1:按照药剂药剂实施例1的配方进行配制,不同的是,活性成分为吡丙醚。
药剂对比例2:按照药剂药剂实施例1的配方进行配制,不同的是,活性成分为环丙氟虫胺。
每种药剂用量为以有效成分计1.0g/亩。
本次试验选择在洛阳市李楼乡桃园村进行。试验品种“金丰60号”白菜。另外,该试验田的土壤情况、耕作管理及生长状况比较一致要求。主要害虫:甜菜夜蛾,黄条跳甲。在每小区内选择连10株白菜,分别于施药前,药后3d、7d、14d、30d各调查一次,共调查4次。依据药前虫口基数和药后各天的残虫量计算防效。虫口减退率及防效计算方法如下:
表4本发明杀虫组合物和对比例田间防效
由表4可知,本发明杀虫组合物相对于单一的农药制剂具有较优的防治效果。
Claims (10)
1.一种含吡丙醚和环丙氟虫胺的杀虫组合物,其特征在于:所述杀虫组合物以吡丙醚和环丙氟虫胺为有效活性成分,其中,吡丙醚和环丙氟虫胺的重量比为1:30-30:1。
2.根据权利要求1所述的含吡丙醚和环丙氟虫胺的杀虫组合物,其特征在于:吡丙醚和环丙氟虫胺的重量比为1:10-5:1。
3.根据权利要求1所述的含吡丙醚和环丙氟虫胺的杀虫组合物,其特征在于:吡丙醚和环丙氟虫胺的重量比为1:5-5:1。
4.根据权利要求1-3任一项所述的含吡丙醚和环丙氟虫胺的杀虫组合物,其特征在于:还包括农药上可接受的助剂,其中,吡丙醚和环丙氟虫胺占组合物总重量的1-99%。
5.根据权利要求4所述的含吡丙醚和环丙氟虫胺的杀虫组合物,其特征在于:所述助剂包括乳化剂、分散剂、润湿剂、防冻剂、稳定剂、增稠剂、溶剂、助溶剂和固体惰性载体中的一种或多种。
6.根据权利要求5所述的含吡丙醚和环丙氟虫胺的杀虫组合物,其特征在于:所述杀虫组合物制备成农药上可接受的剂型。
7.根据权利要求6所述的含吡丙醚和环丙氟虫胺的杀虫组合物,其特征在于:所述剂型为悬浮剂、可分散油悬浮剂、微囊悬浮剂、微囊悬浮-悬浮剂、悬乳剂、可湿性粉剂或水分散粒剂中的一种。
8.权利要求1-7任一项所述的杀虫组合物在防治农作物害虫中的应用。
9.根据权利要求7所述的应用,其特征在于,所述农作物为水稻、蔬菜或果树。
10.根据权利要求8或9所述的应用,其特征在于,所述农作物害虫为水稻二化螟、跳甲、稻纵卷叶螟、甜菜夜蛾、小菜蛾、草地贪夜蛾、苹果小卷叶蛾和蓟马中的一种或多种。
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