CN106070334A - 五倍子源农药的制备方法及其在防治棉花黄萎病中的应用 - Google Patents

五倍子源农药的制备方法及其在防治棉花黄萎病中的应用 Download PDF

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CN106070334A
CN106070334A CN201610408254.6A CN201610408254A CN106070334A CN 106070334 A CN106070334 A CN 106070334A CN 201610408254 A CN201610408254 A CN 201610408254A CN 106070334 A CN106070334 A CN 106070334A
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galla chinensis
verticillium wilt
pesticide
cotton verticillium
preventing
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冯自力
朱荷琴
师勇强
赵丽红
冯鸿杰
李志芳
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Institute of Cotton Research of Chinese Academy of Agricultural Sciences
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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
    • A01N63/00Biocides, pest repellants or attractants, or plant growth regulators containing microorganisms, viruses, microbial fungi, animals or substances produced by, or obtained from, microorganisms, viruses, microbial fungi or animals, e.g. enzymes or fermentates
    • A01N63/10Animals; Substances produced thereby or obtained therefrom
    • 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
    • A01N25/00Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/30Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests characterised by the surfactants

Abstract

本发明涉及五倍子源农药的制备方法及其在防治棉花黄萎病中的应,该杀菌剂是由五倍子经过烘干,浸提、浓缩以后,通过与有机硅表面活性剂按一定比例配制加工而成。使用本发明能有效抑制棉花黄萎病病原菌丝生长和病原孢子萌发,进而有效防治棉花黄萎病,为有效防治棉花黄萎病提供了一种高效、低毒、低残留的植物源农药。

Description

五倍子源农药的制备方法及其在防治棉花黄萎病中的应用
技术领域
本发明涉及防治农作物真菌病害领域,具体涉及五倍子源农药的制备方法及其在防治棉花黄萎病中的应用。
背景技术
由大丽轮枝菌引起的黄萎病是世界性的棉花重要病害之一。90年代以来,该病在我国各大棉区爆发成灾,年发生面积为300万公顷左右,产量损失约1亿公斤皮棉。由于轮作倒茬难,缺乏抗病品种和具有较好防治效果的农药,致使目前生产上对黄萎病的防治几乎是空白,病害的发生危害日趋严重,成为发展棉花生产的主要限制因子之一。
植物源农药是利用植物根、茎、叶、花、果实和种子等部分浸提或分离到的活性成分加工成的制剂。植物源农药的利用可分为两方面,一是直接利用,即对植物中的活性物质进行粗提取后,直接加工成可利用的制剂。这种利用方式的主要优点是能够发挥粗提物中各种成分的协同作用,而且投资少,开发周期短;二是间接利用,即研究活性物质的结构、作用机制、结构与活性间的关系,进而人工模拟合成筛选,从而开发出新型的农药制剂。植物源农药具有以下特点:(1)具有多种生物活性,不仅有杀虫活性,还兼有杀菌和刺激植物生长的活性;(2)对人畜及非靶标生物毒性低,在环境中降解快,低残留,不污染环境;(3)害虫不易产生抗性;(4)原料较易得到,可就地取材,就地加工,使用成本较低。目前,植物源农药越来越受到人们的青睐,是今后生态农药发展的重点方向。
五倍子(Rhus chinensis Mill.),为同翅目蚜虫科的角倍蚜或倍蛋蚜雌虫寄生于漆树科植物“盐肤木”及其同属其他植物的嫩叶或叶柄,刺伤而生成一种囊状聚生物虫瘿,经烘倍干燥后所得。其性寒,味酸、涩,具有敛肺降火、涩肠止泻、敛汗止血、收湿敛疮等功效,主治肺虚久咳、久泻久痢、便血痔血、痈肿疮毒、皮肤湿烂等症,是中国传统的中药,药用价值高,但是其作为植物杀菌剂在植物真菌病害防治方面的功效尚未见报道。
发明内容
本发明的目的是提供一种以五倍子提取物为活性物质的杀菌剂,作为杀菌剂的应用可以有效防治棉花黄萎病。
本发明提供了一种制备该植物杀菌剂的制备方法,包括由五倍子(Rhuschinensis Mill.)提取物和有机硅表面活性剂加工而组成,该杀菌剂中各组分所占质量百分比是:五倍子提取物:96%~98%,有机硅表面活性剂:2%~4%,其中五倍子提取物的提取方法包括如下步骤:
(1)将五倍子于50℃烘干至恒重,然后机械粉碎至40目;
(2)将上述粉碎的五倍子与水按比例混合,质量体积比1/2,浸泡2小时后,于磁力搅拌加热器上,300℃加热煮沸30分钟,冷却后滤出提取液;将滤渣加入2倍体积的水,重复上述提取过程2遍,将三次所得提取液合并,即获得五倍子粗提物;
(3)将五倍子粗提物用旋转蒸发仪60℃旋蒸,浓缩至五倍子干重等质量体积,加入2%的有机硅表面活性剂,即获得五倍子植物源农药。
该杀菌剂可应用于抑制棉花黄萎病病原菌的菌丝生长和病原孢子的萌发。在棉花黄萎病发生始期,施药剂量为200mL/亩-400mL/亩,施药方式为喷雾,每周1次,连续喷雾3次,可以防治棉花黄萎病。
附图说明
图1为五倍子植物源农药对棉花黄萎病病原菌丝生长的抑制作用。
图2为五倍子植物源农药对棉花黄萎病病原孢子萌发的抑制作用。
具体实施方式
实施例1五倍子植物源农药的制备
(1)将五倍子于50℃烘干至恒重,然后机械粉碎至40目;
(2)将上述粉碎的五倍子与水按比例混合,体积比1/2,浸泡2小时后,于磁力搅拌加热器上,300℃加热煮沸30分钟,冷却后滤出提取液;将滤渣加入2倍体积的水,重复上述提取过程2遍,将三次所得提取液合并,即获得五倍子粗提物;
(3)将五倍子粗提物用旋转蒸发仪60℃旋蒸,浓缩至五倍子干重等质量体积,加入2%的有机硅表面活性剂,即获得五倍子植物源农药。
实施例2五倍子植物源农药对棉花黄萎病病原菌丝生长的抑制
将本发明所获得的杀菌剂,按照植物病害研究法推荐的生长速率测定法,对棉花黄萎病病原菌进行了生物活性测定:用打孔器取5mm菌落边缘生长旺盛的病原菌菌种,放在加药的PDA平板上面,以培养基内加等量的无菌水作为对照,每次重复3次,置于25℃恒温培养,用十字交叉法测定每个菌落的直径,以其平均值为代表菌落的直径,以下列公式求出抑制菌丝生长率:
抑制菌丝生长率=(对照菌落直径-处理菌落直径)/(对照菌落直径-5)×100%
表1、五倍子植物源农药对棉花黄萎病病原菌丝生长的抑制作用
实施结果表明(表1),五倍子植物源农药对棉花黄萎病病原菌丝生长具有较好的抑制作用,当五倍子植物源农药浓度达到0.01g/mL时,抑菌率达到100%。由图1可以看出,经杀菌剂处理(A)的棉花黄萎病病原菌丝受到抑制,而对照(B)中病原菌丝能够正常生长。
实施例3五倍子植物源农药对棉花黄萎病病原孢子萌发的抑制作用
将本发明所获得的杀菌剂,按照植物病害研究法推荐的孢子萌发测定方法,对棉花黄萎病病原孢子进行萌发率测定:用无菌水将在马铃薯蔗糖琼脂培养基上培养7天后棉花黄萎病病原菌的孢子洗脱下来并振荡摇匀,通过二倍稀释法使其在显微镜低倍镜(×40)视野中保持个数为100左右。采用载玻片悬滴法,将孢子悬浮液10μL滴在凹玻片上,将不同浓度五倍子植物源农药稀释液取10μL滴加在孢子悬浮液中,使五倍子提取液的终浓度分别为0.01g/mL、0.005g/mL、0.0025g/mL,对照组取等量的蒸馏水作同样处理。25℃培养10h后观察孢子萌发情况,每组包含5个重复,并计算孢子萌发抑制率。
表2、五倍子植物源农药对棉花黄萎病病原孢子萌发的抑制作用
实施结果表明(表2),五倍子植物源农药对棉花黄萎病病原菌孢子萌发具有较好的抑制作用(图2),当五倍子植物源农药浓度达到0.005g/mL时,孢子萌发抑制率达到100%。由图2可以看出,经杀菌剂处理(A)的棉花黄萎病病原孢子萌发受到抑制不能长出菌丝,而对照(B)中病原孢子大量萌发产生菌丝。
实施例4:五倍子植物源农药防治棉花黄萎病的应用
棉花黄萎病防治试验:将本发明所获得的杀菌剂,按照植物病害研究法推荐的方法进行棉花黄萎病防治试验。
本试验在中国农科院棉花研究所棉花黄萎病重病田进行,于棉花黄萎病发生始期(6月5日)开始,将杀菌剂用水稀释,设置3个施药剂量100mL/亩、200mL/亩、400mL/亩喷雾,连续喷药3次,间隔7天。每处理均为4次重复,每重复4行区,小区面积25.6㎡,中间两行为调查区,喷药前调查黄萎病的发病基数,之后每7天一次,至最后一次喷药结束后第7天。计算病情指数和防病效果。以最后一次施药后1周的调查结果来评价各处理的防治效果。病株率、病情指数和防治效果的计算公式如下:
表3五倍子植物源农药对棉花黄萎病病的防治效果
实施结果(表3)表明,五倍子植物源农药能有效防治棉花黄萎病,当施药剂量为100mL/亩~400mL/亩时,相对防效为51.7%~68.3%,显著高于0.5%氨基寡糖素的防治效果。

Claims (5)

1.一种五倍子源农药,其特征在于,所述农药包括96%~98%五倍子杀菌剂和2%~4%有机硅表面活性剂,其中所述五倍子杀菌剂的提取方法包括如下步骤:
(1)将五倍子于50℃烘干至恒重,然后机械粉碎至40目;
(2)将上述粉碎的五倍子与水按比例混合,质量体积比1/2,浸泡2小时后,搅拌加热,300℃加热煮沸30分钟,冷却后滤出提取液;
(3)将滤渣加入2倍体积的水,即获得五倍子粗提物;
(3)蒸发浓缩五倍子粗提物,加入2%的有机硅表面活性剂,即获得五倍子植物源农药。
2.根据权利要求1所述的五倍子源农药,其特征在于,重复步骤(2)2遍。
3.根据权利要求1所述的五倍子源农药,其特征在于,在步骤(3)中,)蒸发五倍子粗提物,浓缩至五倍子干重等质量体积。
4.权利要求1所述的五倍子源农药用于防治棉花黄萎病的应用。
5.根据权利要求4所述的应用,其特征在于,施药剂量为200mL/亩-400mL/亩,施药方式为喷雾,每周1次,连续喷雾3次。
CN201610408254.6A 2016-06-10 2016-06-10 五倍子源农药的制备方法及其在防治棉花黄萎病中的应用 Pending CN106070334A (zh)

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CN111713510A (zh) * 2020-06-08 2020-09-29 西北农林科技大学 五倍子提取物用于制备植物源诱抗剂的应用及诱抗剂
CN112056330A (zh) * 2020-08-17 2020-12-11 石河子大学 一种棉花黄萎病防治方法
CN113712052A (zh) * 2021-09-29 2021-11-30 菏泽嘉麟生物科技有限公司 一种防治棉花黄萎病菌剂的制作方法

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Application publication date: 20161109