CN115024332B - 一种防治辣椒炭疽病的农药组合物 - Google Patents
一种防治辣椒炭疽病的农药组合物 Download PDFInfo
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Abstract
本发明属于农药技术领域,具体涉及一种防治辣椒炭疽病的农药组合物。一种防治辣椒炭疽病的农药组合物,其有效成分由氟硅唑、多抗霉素、溴菌腈或腐霉利与大蒜素复配而成。本发明农药组合物中的有效成分氟硅唑、多抗霉素、溴菌腈或腐霉利与大蒜素复配后具有很好的协同增效作用,可以提高辣椒炭疽病的防治效果,降低防治成本,降低在辣椒中的农药残留。
Description
技术领域
本发明属于农药技术领域,具体涉及一种防治辣椒炭疽病的农药组合物。
背景技术
辣椒炭疽病是辣椒生长过程中发生普遍且危害严重的世界性病害,其会引起辣椒叶片脱落,果实腐烂,严重时会引起辣椒植株死亡,导致产量减少,如果不能及时防治,会对辣椒收益造成巨大影响,造成严重的经济损失。目前,化学防治仍是辣椒炭疽病的主要防治措施,随着时间的推移,辣椒炭疽病对现有常见农药已产生了不同程度的抗性,导致辣椒炭疽病的防治效果降低。为了达到较好的防治效果通常会选择加大农药的施用剂量和施用次数,导致防治成本增加,同时也增加了辣椒中的农药残留量,存在食品安全隐患。
大蒜素(allicin)是从大蒜中提取的植物源抗生素,其生物活性主要来源于与疏基化合物的相互作用和抗氧化能力,其抗菌的机理可能是对乙酰辅酶A的抑制作用。有研究表明大蒜素对辣椒炭疽病菌菌丝生长、孢子产生和孢子萌发具有抑制作用。
将不同农药品种进行复配是开发农药新产品的有效途径。目前,还尚未见有氟硅唑、多抗霉素、溴菌腈或腐霉利与大蒜素复配的相关报道。
发明内容
本发明的目的在于提供一种防治辣椒炭疽病的农药组合物,从而克服辣椒炭疽病对现有常见农药已产生了不同程度的抗性导致辣椒炭疽病的防治效果降低的缺点。
为实现上述目的,本发明提供了如下技术方案:
一种防治辣椒炭疽病的农药组合物,其有效成分由氟硅唑、多抗霉素、溴菌腈或腐霉利与大蒜素复配而成。
作为优选,所述氟硅唑和大蒜素的质量比为1-3:40-1。
作为优选,所述多抗霉素和大蒜素的质量比为1-20:7-1。
作为优选,所述溴菌腈和大蒜素的质量比为1-15:50-1。
作为优选,所述腐霉利和大蒜素的质量比为1-60:10-1。
与现有技术相比,本发明具有如下有益效果:
本发明的农药组合物中的有效成分氟硅唑、多抗霉素、溴菌腈或腐霉利与大蒜素复配后具有很好的协同增效作用,可以提高对辣椒炭疽病的防治效果,可以减少农药施用剂量,进而降低防治成本,降低辣椒中的农药残留。
具体实施方式
根据下述实施例,可以更好地理解本发明。然而,本领域的技术人员容易理解,实施例所描述的内容仅用于说明本发明,而不应当也不会限制权利要求书中所详细描述的本发明。
实施例:辣椒炭疽病防治药剂筛选
1.供试菌株:辣椒炭疽病菌(Colletotrichum capsici),采自染病辣椒植株,在实验室内分离得到,保存于PDA培养基上。
2.PDA培养基:去皮马铃薯200g、蔗糖20g、琼脂15g,蒸馏水1000mL。
3.供试药剂
96%大蒜素精油(上海蓓琅生物科技有限公司);
93%氟硅唑原药(山东新龙农化有限公司);
99%多抗霉素原药(湖北实兴化工有限公司);
95%溴菌腈原药(江苏托球农化股份有限公司);
98.5%腐霉利原药(浙江禾本科技股份有限公司)。
将供试药剂用0.1%吐温-80水溶液稀释(固体供试药剂先用二甲基亚砜溶解后再稀释),配制成单剂母液,设置多组配比,各单剂和配比混剂均按等比方法设置5个质量浓度梯度。
4.试验方法:采用菌丝生长速率法,将预先融化的PDA培养基9mL加入无菌锥形瓶中,从低浓度到高浓度依次定量吸取药液1mL,分别加入上述锥形瓶中,充分摇匀后等量倒入3个直径为9cm的培养皿中,制成相应浓度的含药平板;并设不含药剂的处理作空白对照,每个处理设置3个重复。用直径5mm打孔器在供试菌株菌落边缘切取菌饼,接种于含药平板和空白对照平板中央,盖上皿盖后置于25℃恒温箱培养4d,用十字交叉法测量菌落直径,计算不同处理对菌丝生长抑制率。
5.数据分析:采用DPS软件进行数据统计分析,以杀菌剂浓度对数值为x,对应的菌丝生长抑制率几率值为y进行线性回归,得出毒力回归方程及药剂对靶标病菌的毒力EC50值,并根据孙云沛法计算共毒系数(CTC)。
实测毒力指数(ATI)=(标准药剂EC50/供试药剂EC50)×100;
理论毒力指数(TTI)=A药剂毒力指数×混剂中A的百分含量+B药剂毒力指数×混剂中B的百分含量;
共毒系数(CTC)=[混剂实测毒力指数(ATI)/混剂理论毒力指数(TTI)]×100。
6.测定结果
根据计算的共毒系数(CTC)评价药剂的增效作用,CTC≤80为拮抗作用,80<CTC<120为相加作用,CTC≥120为增效作用,结果见表1-4。
表1氟硅唑和大蒜素复配对辣椒炭疽病菌的室内生物活性测定
药剂名称及配比 | EC50(mg/L) | ATI | TTI | CTC |
氟硅唑 | 0.74 | 100.00 | -- | -- |
大蒜素 | 143.29 | 0.52 | -- | -- |
氟硅唑1:大蒜素40 | 18.83 | 3.93 | 2.94 | 133.54 |
氟硅唑1:大蒜素20 | 9.17 | 8.07 | 5.25 | 153.60 |
氟硅唑1:大蒜素10 | 3.13 | 23.64 | 9.56 | 247.29 |
氟硅唑1:大蒜素5 | 1.23 | 60.16 | 17.10 | 351.89 |
氟硅唑1:大蒜素1 | 0.89 | 83.15 | 50.26 | 165.44 |
氟硅唑3:大蒜素1 | 0.31 | 238.71 | 75.13 | 317.73 |
由表1可知,有效成分氟硅唑和大蒜素复配后,在质量比为1-3:40-1范围内对辣椒炭疽病菌的共毒系数均大于120,表现为增效作用。
表2多抗霉素和大蒜素复配对辣椒炭疽病菌的室内生物活性测定
药剂名称及配比 | EC50(mg/L) | ATI | TTI | CTC |
多抗霉素 | 10.22 | 100.00 | -- | -- |
大蒜素 | 143.29 | 7.13 | -- | -- |
多抗霉素1:大蒜素7 | 31.34 | 32.61 | 18.74 | 174.01 |
多抗霉素1:大蒜素5 | 22.48 | 45.46 | 22.61 | 201.07 |
多抗霉素1:大蒜素1 | 13.29 | 76.90 | 53.57 | 143.56 |
多抗霉素5:大蒜素1 | 2.25 | 454.22 | 84.52 | 537.40 |
多抗霉素10:大蒜素1 | 1.13 | 904.42 | 91.56 | 987.82 |
多抗霉素20:大蒜素1 | 4.17 | 245.08 | 95.58 | 256.42 |
由表2可知,有效成分多抗霉素和大蒜素复配后,在质量比为1-20:7-1范围内对辣椒炭疽病菌的共毒系数均大于120,表现为增效作用,尤其是当质量比为10:1时,共毒系数达到了987.82,增效作用尤其显著。
表3溴菌腈和大蒜素复配对辣椒炭疽病菌的室内生物活性测定
药剂名称及配比 | EC50(mg/L) | ATI | TTI | CTC |
溴菌腈 | 15.64 | 100.00 | -- | -- |
大蒜素 | 143.29 | 10.91 | -- | -- |
溴菌腈1:大蒜素50 | 42.48 | 36.82 | 12.66 | 290.78 |
溴菌腈1:大蒜素40 | 32.21 | 48.56 | 13.09 | 371.01 |
溴菌腈1:大蒜素20 | 19.32 | 80.95 | 15.16 | 534.09 |
溴菌腈1:大蒜素10 | 21.28 | 73.50 | 19.01 | 386.55 |
溴菌腈1:大蒜素5 | 37.44 | 41.77 | 25.76 | 162.15 |
溴菌腈1:大蒜素1 | 13.18 | 118.66 | 55.46 | 213.97 |
溴菌腈5:大蒜素1 | 10.86 | 144.01 | 85.15 | 169.13 |
溴菌腈10:大蒜素1 | 8.80 | 177.73 | 91.90 | 193.39 |
溴菌腈15:大蒜素1 | 11.82 | 132.32 | 94.43 | 140.12 |
由表3可知,有效成分溴菌腈和大蒜素复配后,在质量比为1-15:50-1范围内对辣椒炭疽病菌的共毒系数均大于120,表现为增效作用。
表4腐霉利和大蒜素复配对辣椒炭疽病菌的室内生物活性测定
药剂名称及配比 | EC50(mg/L) | ATI | TTI | CTC |
腐霉利 | 1.57 | 100.00 | -- | -- |
大蒜素 | 143.29 | 1.10 | -- | -- |
腐霉利1:大蒜素10 | 11.51 | 13.64 | 10.09 | 135.23 |
腐霉利1:大蒜素5 | 6.17 | 25.45 | 17.58 | 144.74 |
腐霉利1:大蒜素1 | 1.25 | 125.60 | 50.55 | 248.48 |
腐霉利5:大蒜素1 | 0.94 | 167.02 | 83.52 | 199.99 |
腐霉利10:大蒜素1 | 1.34 | 117.16 | 91.01 | 128.74 |
腐霉利20:大蒜素1 | 1.08 | 145.37 | 95.29 | 152.56 |
腐霉利40:大蒜素1 | 0.63 | 249.21 | 97.59 | 255.37 |
腐霉利60:大蒜素1 | 1.12 | 140.18 | 98.38 | 142.49 |
由表4可知,有效成分腐霉利和大蒜素复配后,在质量比为1-60:10-1范围内对辣椒炭疽病菌的共毒系数均大于120,表现为增效作用。
综上,大蒜素与氟硅唑、多抗霉素、溴菌腈或腐霉利复配后具有很好的协同增效作用,可以提高辣椒炭疽病的防治效果,降低防治成本,降低在辣椒中的农药残留。
上所述仅是本发明的优选实施方式,对于本领域技术人员来说,在不脱离本发明原理的前提下,可以做适当的改进,这些改进也在本发明的保护范围之内。
Claims (1)
1.一种防治辣椒炭疽病的农药组合物,其特征在于,其有效成分由氟硅唑与大蒜素复配而成,所述氟硅唑和大蒜素的质量比为1-3:40-1。
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