CN106376590B - 一种含苦皮藤素和茚虫威的杀虫组合物 - Google Patents

一种含苦皮藤素和茚虫威的杀虫组合物 Download PDF

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CN106376590B
CN106376590B CN201610815642.6A CN201610815642A CN106376590B CN 106376590 B CN106376590 B CN 106376590B CN 201610815642 A CN201610815642 A CN 201610815642A CN 106376590 B CN106376590 B CN 106376590B
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indoxacarb
celastrus angulatus
pesticidal combination
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angulatus
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CN106376590A (zh
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韦锦思
韦敏
杨业喜
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Anhui Jialian Biological Science & Technology Co., Ltd.
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ANHUI JIALIAN BIOLOGICAL SCIENCE & TECHNOLOGY Co Ltd
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION 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
    • A01N47/00Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
    • A01N47/08Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
    • A01N47/28Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
    • A01N47/38Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the group >N—CO—N< where at least one nitrogen atom is part of a heterocyclic ring; Thio analogues thereof
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION 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
    • A01N43/00Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/02Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
    • A01N43/04Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom
    • A01N43/06Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom five-membered rings
    • A01N43/12Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom five-membered rings condensed with a carbocyclic ring

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Abstract

本发明涉及一种含苦皮藤素和茚虫威的杀虫组合物,有效成分由茚虫威和苦皮藤素组成,其中茚虫威和苦皮藤素的重量比为5‑25:1‑2。本发明具有协同增效作用,适用于茶小绿叶蝉的防治能延缓害虫抗性的发展,减少各单剂的施用量,提高防治效果,同时有利于减少化学农药残留。

Description

一种含苦皮藤素和茚虫威的杀虫组合物
技术领域
本发明涉及农药应用技术领域,具体是一种含苦皮藤素和茚虫威的杀虫组合物。
背景技术
茶小绿叶蝉是茶区普遍发生、危害性较大和重点防治的主要害虫,其中以假眼小绿叶蝉的危害最为严重。茚虫威是防治茶小绿叶蝉的药剂之一,但其持效期偏短,且使用成本较高,为了延缓其抗药性,延长该药的使用寿命,确有必要提供一种适合防治小绿叶蝉的高效杀虫组合物。
茚虫威(indoxacarb)是一种新型噁二嗪类杀虫剂,其作用机理是通过不可逆地阻断害虫神经细胞内的钠离子通道,破坏害虫的神经冲动传递,导致靶标害虫运动失调,停止取食,麻痹并最终死亡。具有触杀和胃毒功能,与其他杀虫剂无交互抗性。
苦皮藤属卫矛科南蛇藤属多年生藤本植物,广泛分布于我国黄河、长江流域的丘陵和山区。苦皮藤的根皮和茎皮均含有多种强力杀虫成分,目前已从根皮或种子中分离鉴定出数十个新化合物,特别是从种油中获得4个结晶,即苦皮藤酯I-Ⅳ、从根皮中获得5个纯天然产物,即苦皮藤素I-V。这些苦皮藤重要的杀虫活性成分均简称为苦皮藤素(celastrusangulatus)。
通过不同作用机理的农药成分进行复配,是延缓病虫害抗药性的一个快捷而简单的途径,以茚虫威与苦皮藤素混配用于防治茶小绿叶蝉的尚无报道与应用。
发明内容
本发明要解决的技术问题是,提供一种含苦皮藤素和茚虫威的杀虫组合物,以解决茚虫威单独使用时用药量大、成本高、容易产生抗性和农药残留等实际问题。
本发明采用以下技术方案:一种含苦皮藤素和茚虫威的杀虫组合物,有效成分由茚虫威和苦皮藤素组成,茚虫威和苦皮藤素的重量比为5-25:1-2,优选的,茚虫威和苦皮藤素的重量比为25:1。
所述的杀虫组合物,茚虫威在组合物的重量百分比为2-5%,苦皮藤素在组合物中的重量百分比为0.2-0.5%。
本发明的杀虫组合物按照本领域技术人员所公知的方法,加入相应辅助剂,制成乳油、微乳剂、水乳剂、悬浮剂等农业上可接受的剂型。
本发明的杀虫组合物的辅助剂包括溶剂、乳化剂、润湿剂、稳定剂、消泡剂、增稠剂、分散剂或其它有益于有效成分在制剂中稳定和药效发挥的已知物质,都是农药制剂领域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定。
与现有技术相比,本发明具备以下技术效果:
(1)茚虫威和苦皮藤素按一定比例复配后对害虫具有协同增效作用,能减少各单剂的施用量,提高防治效果。
(2)茚虫威和苦皮藤素的作用机理不同,相互混用能延缓害虫抗药性发展,有利于延长茚虫威的使用寿命。
(3)本发明能减少化学药剂茚虫威的使用量和使用次数,有利于减少化学农药的残留,更绿色环保。
具体实施方式
以下结合测定杀虫剂活性的室内联合毒力测定试验及大田药效试验对本发明的技术方案和技术效果作进一步说明,本发明所述的百分比均为重量百分比。
发明人通过大量的筛选试验,发现茚虫威与苦皮藤素在一定配比范围内混配对茶小绿叶蝉具有明显的协同增效作用,其效果不仅仅是两种药剂的简单相加,具体用以下生物测定实例加以说明。
一、生物测定实例
实施例1:茚虫威、苦皮藤素及其混剂对茶树假眼小绿叶蝉室内毒力测定
供试对象:茶小绿叶蝉(Empoasca flavescens)采自福建漳州市南靖县,在茶树上养殖,挑取一致的3龄若虫用于试验。
试验药剂:80%茚虫威母药(山东潍坊润丰化工股份有限公司),6%苦皮藤素母药(河南省新乡市东风化工厂)
试验方法:参考(庄家祥等,2009,福建省茶小绿叶蝉抗药性的地区差异)和农药室内生物测定试验准则杀虫剂NY/T 1154.11-2008),采用浸梢法。
采用孙云沛的共毒系数法(CTC)来评价药剂混用的增效作用,当共毒系数(CTC)≥120时,组合物表现为增效作用;当CTC≤80时,组合物表现为拮抗作用;当80<CTC<120时,组合物表现为相加作用。
试验结果见表1。
表1茚虫威、苦皮藤素及其混剂对茶小绿叶蝉联合毒力测定表
供试药剂 配比 LC<sub>50</sub>(mg/L) 共毒系数(CTC)
茚虫威(A) / 2.28 /
苦皮藤素(B) / 0.73 /
A:B 5:1 1.31 128.8
A:B 10:1 1.42 134.4
A:B 15:1 1.36 147.6
A:B 20:1 1.31 158.3
A:B 25:1 1.17 179.6
A:B 5:2 1.10 129.1
A:B 15:2 1.34 136.3
A:B 25:2 1.29 152.3
A:B 2:5 1.19 76.0
表1联合毒力测试的结果表明,茚虫威和苦皮藤素重量比为5-25:1-2之间混配对茶小绿叶蝉的共毒系数(CTC)均大于120,具有增效作用,其中当重量比为25:1时,共毒系数最大,增效最为显著。
二、制备实施例
实施例1:5.2%茚虫威·苦皮藤素悬浮剂(茚虫威∶苦皮藤素=25:1)
按量称取茚虫威5%、苦皮藤素0.2%、烷基酚甲醛树脂聚氧乙烯醚3.5%(分散剂)、烷基酚聚氧乙烯基醚磷酸酯3.0%(润湿剂)、1.5%聚乙烯醇(增稠剂)、0.3%有机硅消泡剂,去离子水补足至100%。
实施例2:2.5%茚虫威·苦皮藤素悬浮剂(茚虫威∶苦皮藤素=23:2)
按量称取茚虫威2.3%、苦皮藤素0.2%、烷基芳基聚氧丙烯聚氧乙烯醚3.5%(分散剂)、聚萘甲醛磺酸钠5.0%(润湿剂)、乙二醇2.5%(抗冻剂)、黄原胶0.8%、0.3%有机硅消泡剂,去离子水补足至100%。
实施例1-2的制备方法是:将各组份按配方的比例混合均匀,经研磨和高速剪切后得到含有茚虫威·苦皮藤素的杀虫组合物,剂型为悬浮剂。
实施例3:2.2%茚虫威·苦皮藤素乳油(茚虫威∶苦皮藤素=10:1)
按量称取茚虫威2.0%、苦皮藤素0.2%、十二烷基苯磺酸钠3%(分散剂)、辛基酚聚氧乙烯醚2.0%(乳化剂)、二甲亚砜5%(助溶剂)、松脂油补足至100%。
实施例3的制备方法是:将茚虫威和苦皮藤素原药、乳化剂和助溶剂等,按配方比例依次加入混合釜,搅拌均匀,即得2.2%茚虫威·苦皮藤素乳油。
实施例4:3.0%茚虫威·苦皮藤素水乳剂(茚虫威∶苦皮藤素=5:1)
按量称取茚虫威2.5%、苦皮藤素0.5%、联苯酚聚氧乙烯醚3.5%、二甲苯10%、十二烷基苯磺酸钙5.0%、有机硅0.8%、水补足至100%。
实施例4的制备方法为:将茚虫威和苦皮藤素原药、溶剂、乳化剂溶解,然后与水混合,并经反应釜的高速搅拌和剪切机的高速剪切,即制得3.0%茚虫威·苦皮藤素水乳剂。
三、大田药效实施例
实施例1:茚虫威和苦皮藤素复配对茶小绿叶蝉的田间药效试验
试验设计:试验采用常规喷雾法,喷药时力求均匀周到。施药时田间茶小绿叶蝉为1-2代发生高峰期。施药前在每小区按对角线5点取样,每点选取有茶小绿叶蝉卵及成虫的茶叶树3株,统计施药前茶小绿叶蝉数量的虫口基数。药后3d、7d、15d分别调查残留茶小绿叶蝉活虫数,记载活虫数,计算防治效果。
试验期间天气良好,日平均气温为18.0-26.8℃。试验期间观察各处理小区茶叶生长良好,均未发现有药害现象发生。
试验结果见表2
从表2可以看出,茚虫威与苦皮藤素复配后,有利于提高防治效果,提高防治的速效性和持效期,有利于减少用药次数,对显著延缓茶树小绿叶蝉抗药性的产生和降低防治成本具有重要意义。

Claims (3)

1.一种含苦皮藤素和茚虫威的杀虫组合物,其特征在于,茚虫威和苦皮藤素的重量比为5-25:1-2。
2.根据权利要求1所述的杀虫组合物,其特征在于,茚虫威和苦皮藤素的重量比为25:1。
3.根据权利要求1或2所述的杀虫组合物,其特征在于,茚虫威的重量百分比为2-5%,苦皮藤素的重量百分比为0.2-0.5%。
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