CN106212468A - 一种含苯并烯氟菌唑和几丁聚糖的杀菌组合物 - Google Patents
一种含苯并烯氟菌唑和几丁聚糖的杀菌组合物 Download PDFInfo
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Abstract
本发明涉及一种含苯并烯氟菌唑和几丁聚糖的杀菌组合物，其中，苯并烯氟菌唑和几丁聚糖的重量比为1:20‑40:1，本发明的组合物可以通过常规的制剂加工方法加工成多种剂型，主要用于防治农作物白粉病。
Description
技术领域
本发明涉及一种杀菌组合物，具体涉及的是一种含苯并烯氟菌唑和几丁聚糖的杀菌组合物。
背景技术
白粉病是一种广泛发生的世界性病害，生产上主要采用化学农药防治白粉病，目前主要依赖苯并咪唑类、三唑类、甲氧基丙烯酸酯类杀菌剂。然而，长期使用单一种类的杀菌剂会使病害产生不同程度的抗性，防治效果降低。
苯并烯氟菌唑是一种吡唑酰胺类杀菌剂，通过抑制线粒体内膜上电子传递链中的琥珀酸脱氢酶，使得病原真菌无法经由呼吸产生能量，进而瓦解病菌的生长，该化合物单独使用成本较高且容易又发抗性的产生，从而降低农药品种的使用寿命。
几丁聚糖，又名甲壳素、海力源，是一类从食用昆虫及海洋生物中提取的甲壳质经脱乙酰基二得到的一种天然阳离子多糖，具有可降解性、良好的成膜性和生物相容性及抗菌、抗肿瘤等生物活性，广泛应用于医药、食品和化工等行业。在农业生产中，几丁聚糖是一种优良的生物源作物保护剂，具有诱导作物体抗性因子的功能，又可以成膜防护空气中的致病菌飘移侵染及有害气体的侵蚀伤害。几丁聚糖无毒无害，是具有肥药双重功能的生物调节剂；也是无毒无公害的增稠剂，可以减少制剂生产中增稠剂的使用。
本发明的发明人对苯并烯氟菌唑和几丁聚糖的配方筛选进行了深入研究，发现苯并烯氟菌唑和几丁聚糖的混配在一定范围内对白粉病具有明显的协同增效作用，经进一步研究完成了本发明。目前尚无苯并烯氟菌唑和几丁聚糖的复配杀菌剂的相关报道。
发明内容
本发明的目的在于提供一种对白粉病具有优异防治效果的农药组合物，有助于减少农药使用量、延缓抗药性的产生，出人预料的，本发明的组合物在一定的比例范围内混配具有明显的协同增效作用。
为解决上述技术问题，本发明采用如下技术方案：一种农药组合物，其特征在于，其活性成分包含苯并烯氟菌唑和几丁聚糖，其中，苯并烯氟菌唑和几丁聚糖的重量比为1:20-40:1。
进一步的，所述农药组合物中活性成分的重量比为0.1-80%。
进一步的，所述农药组合物可以辅以农药制剂加工中合适的辅助成分加工成任意一种农药剂型，例如可以时可湿性粉剂、水分散粒剂、水乳剂、微乳剂、悬浮剂。
本发明的组合物可以以成品制剂形式提供即组合物中各物质已经混合，也可以以单剂形式提供，使用前直接在桶或罐中按比例混合，然后稀释至所需要的浓度。
进一步的，本发明的组合物还可以加入其它农用活性成分，例如杀菌剂、杀虫剂、除草剂、肥料等农用活性成分。
本发明的杀菌组合物适用于防除黄瓜白粉病、番茄白粉病、草莓白粉病等多种病害。
与现有技术相比，本发明的农药组合物的有益效果为：
（1）本发明的组合物复配后，在一定的范围内具有明显的协同增效作用，防效与单个活性成分相比有明显的提高；
（2）本发明的组合物中活性成分作用机理各不相同，在有效防治作物病害的同时，可以延缓病原菌抗药性的产生，有利于延缓农药活性成分的使用寿命；
（3）本发明的组合物制备工艺简单，适合实际生产中推广应用。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，本发明用以下具体实施例进行说明，但本发明绝非限于这些例子。以下所述仅为本发明较好的实施例，仅仅用于解释本发明，但不能因此理解为对本发明专利范围的限制。应当指出的是，凡在本发明的精神和原则之内所作的任何修改、等同替换或改进等，均应包含在本发明的保护范围之内，因此，本发明专利的保护范围应以所附权利要求为准。
一、制剂实施例
1、实施例1: 51%苯并烯氟菌唑·几丁聚糖水分散粒剂（50:1）
苯并烯氟菌唑 50%
几丁聚糖 1%
木质素磺酸钠 5%
十二烷基硫酸钠 5%
聚乙烯醇 1%
尿素 2%
硅藻土 余量
2、实施例2:42%苯并烯氟菌唑·几丁聚糖可湿性粉剂（20:1）
苯并烯氟菌唑 40%
几丁聚糖 2%
烷基萘磺酸钠 12%
木质素磺酸钠 6%
白炭黑 5%
硅藻土 余量
3、实施例3: 6%苯并烯氟菌唑·几丁聚糖水乳剂（1：1）
苯并烯氟菌唑 3%
几丁聚糖 3%
脂肪醇聚氧乙烯醚 5%
烷基聚乙二醇醚 3%
聚氧乙烯脂肪醇 5%
N-甲基吡咯烷酮 20%
异丁醇 8%
去离子水 余量
4、实施例4: 5.5%苯并烯氟菌唑·几丁聚糖悬浮剂（1:10）
苯并烯氟菌唑 0.5%
几丁聚糖 5%
亚甲基双萘磺酸钠 2%
聚羧酸盐 2%
硅酸镁铝 1%
黄原胶 0.1%
苯甲酸钠 0.2%
有机硅酮 0.2%
去离子水 余量
二、室内毒力测定
试验对象：黄瓜白粉病菌
试验方法：试验参考中华人民共和国行业标准NY/T 1156.11-2008《农药室内生物测定试验准则杀菌剂第11部分：防治瓜类白粉病试验盆栽法》，采用盆栽法测定。
播种感病黄瓜品种，盆栽生长至2片真叶期备用。将配制好的苯并烯氟菌唑和几丁聚糖母液用0.1%吐温-80表面活性剂水溶液溶解并制备浓度梯度。并设只含溶剂和表面活性剂而不含有效成分的处理作空白对照。药剂处理后24 h，喷雾接种黄瓜白粉病菌孢子悬浮液。孢子悬浮液的配制过程如下：取长满白粉病菌叶片，用加油少量吐温-80表面活性剂的无菌水将孢子洗下，双层纱布过滤，镜检后调制成1×105个/mL的悬浮液。接种后置于恒温室中，在温度24℃条件下培养7天。待空白对照病液率达到80%以上时，分级调查各处理发病情况，计算各处理的病情指数和防治效果。
根据colby公式计算两种药剂的增效情况，试验结果如表1所示。
室内活性测定结果如表1所示，从表1中可以看出，苯并烯氟菌唑与几丁聚糖在所述范围内均表现出协同增效作用。
三、田间药效试验
为了进一步验证本发明的实际应用效果，采用本发明实施例的药剂进行防治黄瓜白粉病田间药效试验。
供试药剂：（1）51%苯并烯氟菌唑·几丁聚糖水分散粒剂；（2）42%苯并烯氟菌唑·几丁聚糖可湿性粉剂；（3）6%苯并烯氟菌唑·几丁聚糖水乳剂；（4）5.5%苯并烯氟菌唑·几丁聚糖悬浮剂；（5）对比例1:10%苯并烯氟菌唑悬浮剂；（6）对比例2:0.5%几丁聚糖水剂。
分别于药后5天、10天调查病情指数并计算防效，试验结果见表2。
田间药效试验结果表明，实施例1-4的复配组合物制剂对黄瓜白粉病均表现出较好的防效，防治效果明显由于单个活性成分的防效，另外，在用药范围内，本发明的组合物未发现对作物产生药害，且与单剂相比，黄瓜生长更茁壮，值得在生产上推广应用。
Claims (5)
1.一种杀菌组合物，其特征在于，活性成分包含苯并烯氟菌唑和几丁聚糖。
2.根据权利要求1所述的杀菌组合物，其特征在于，所述苯并烯氟菌唑和几丁聚糖的重量比为1:20-40：1。
3.根据权利要求1或2所述的杀菌组合物，其特征在于，所述组合物中活性成分的重量百分含量为0.1-80%。
4.根据权利要求1-3中任一项权利要求所述的杀菌组合物，其特征在于，它的剂型为可湿性粉剂、水分散粒剂、水乳剂、微乳剂、可分散油悬浮剂。
5.根据权利要求1-4中任一项权利要求所述的杀菌组合物用于防治农作物病害的用途。
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