CN115005217B - 一种防治辣椒根结线虫病的杀线虫组合物 - Google Patents

一种防治辣椒根结线虫病的杀线虫组合物 Download PDF

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CN115005217B
CN115005217B CN202210844661.7A CN202210844661A CN115005217B CN 115005217 B CN115005217 B CN 115005217B CN 202210844661 A CN202210844661 A CN 202210844661A CN 115005217 B CN115005217 B CN 115005217B
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廖博通
陈琳
唐可兰
刘志华
李健生
文明英
刘阳华
颜军
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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根结线虫病的杀线虫组合物。一种防治辣椒根结线虫病的杀线虫组合物,其有效成分由咯菌腈与唑虫酰胺、氟烯线砜或环氧虫啉二元复配而成。本发明的杀线虫组合物在一定质量比范围内对南方根结线虫具有协同增效作用,较之单剂单独使用明显提高了对南方根结线虫的防治效果,可有效防治辣椒根结线虫病,同时可以减少活性成分的施用量,降低农药残留和防治成本。

Description

一种防治辣椒根结线虫病的杀线虫组合物
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根结线虫病的杀线虫组合物。
背景技术
辣椒根结线虫病,主要为害辣椒植株根部或须根,在苗期和成株期均可发病。苗期发病时,地上部分无明显症状,检视根部可见幼苗须根或侧根上产生灰白色根结,有的病株主根略显重大。进入开花期病株萎焉,拔起病株可见根上产生大量大小不等的瘤状根结,剖开根结染病部位会有很多细小的乳白色线虫埋藏其中。受根结线虫侵染的辣椒植株地上部分会生长衰弱,并逐渐枯黄。
辣椒根结线虫病的病原主要为南方根结线虫(Meloidogyne incognita),属动物界线虫门植物寄生线虫。南方根结线虫幼虫从辣椒植株根部侵入,刺激根部细胞增生进而产生肿瘤状根结。根结线虫发育到4龄时交配产卵,卵在根结里孵化发育,2龄后开始离开卵壳进入土壤寻找寄主进行侵染或越冬。在田间主要靠病土和病苗传播。
传统的防治办法主要以化学熏蒸剂为主,高毒农药占据主导地位,但随着人们环保意识的增强,高毒农药相继被禁用和淘汰。目前市面上针对根结线虫病的防治药剂较少,主要集中在阿维菌素、噻唑膦、淡紫拟青霉和厚孢轮枝菌,随着这些药剂的长期使用,根结线虫已对其产生不同程度的抗药性,使得防治效果逐渐减低,防治效果不理想。
将不同活性成分组合并测定其对靶标的生物活性,是开发农药、提高防治效果的有效方法之一。比如申请号CN201610450077.8,公开了一种含阿维菌素和咯菌腈的农药组合物,并具体公开了阿维菌素和咯菌腈的组合物之间对防治根结线虫均有明显的增效作用,可以提高对根结线虫的防治效果。另外,申请号CN201510182458.8,也公开了一种防止根结线虫的农药组合物,并具体公开了异菌脲和氟啶虫胺腈混配后,具有明显增效作用,提高了对番茄根结线虫的防治效果。其次,申请号CN201611010656.3,公开了一种氟吡菌酰胺和糠醛的杀线虫组合物,并具体公开了氟吡菌酰胺和糠醛复配后具有协同增效作用,明显增强了防治线虫的效果。
发明人通过对现有活性成分进行组合筛选,发现咯菌腈与唑虫酰胺、氟烯线砜或环氧虫啉复配时,对防治南方根结线虫具有明显增效作用,目前还未见有相关报道。
发明内容
本发明的目的在于提供一种防治辣椒根结线虫病的杀线虫组合物,其两种有效成分进行复配后具有协同增效作用,较之单剂单独使用明显提高了对南方根结线虫的防治效果,可有效防治辣椒根结线虫病。
为实现上述目的,本发明提供了一种防治辣椒根结线虫病的杀线虫组合物,其有效成分由咯菌腈与唑虫酰胺、氟烯线砜或环氧虫啉二元复配而成。
作为优选,所述咯菌腈与唑虫酰胺的质量比为1-25:15-1。
作为优选,所述咯菌腈与氟烯线砜的质量比为1-40:10-1。
作为优选,所述咯菌腈与环氧虫啉的质量比为1-30:30-1。
与现有技术相比,本发明具有以下有益效果:
本发明咯菌腈与唑虫酰胺、氟烯线砜或环氧虫啉进行复配后在一定质量比范围内具有协同增效作用,提高了对南方根结线虫的防治效果,可有效防治辣椒根结线虫病,同时可以减少活性成分的施用量,降低农药残留和防治成本。
具体实施方式
下面对本发明的具体实施方式进行详细描述,但应当理解本发明的保护范围并不受具体实施方式的限制。
实施例:咯菌腈复配时的室内生物活性试验
供试药剂:97%咯菌腈原药(河北省衡水北方农药化工有限公司)、98%唑虫酰胺原药(山东海利尔化工有限公司)、95%氟烯线砜原药(安道麦马克西姆有限公司)、95%环氧虫啉原药(四川和邦生物科技股份有限公司);
供试线虫:南方根结线虫(Meloidogyne incognita);
试验方法:(参考《NT/Y 1833.1-2009农药室内生物测定试验准则杀线虫剂第1部分抑制植物病原线虫试验浸虫法》)。
1.从辣椒根上挑取根结线虫的卵,清水清洗后置于培养皿的湿滤纸上,25℃下孵化,获得龄期一致的二龄幼虫;用水将培养好的根结线虫洗脱,过滤,1000r/min下离心2min,弃上清液,加水,再离心,最后用水将根结线虫重悬浮至250头/mL,备用;
2.将各供试药剂先用二甲基亚砜有机溶剂溶解,再用0.1%吐温-80稀释分别配制单剂母液,设置多组配比,各单剂及每组配比混剂均按等比方法设置7个系列质量浓度,备用;
3.用移液管从低浓度到高浓度,依次吸取药液3mL分别加入试管中,然后吸取制备好的等量线虫悬浮液3mL加入试管内,使药液与线虫悬浮液等量混合均匀;用移液器移一定体积的上述混合液于24孔生化测试板的小孔内,加盖,于25℃恒温培养24h;同时设不含药剂的处理为对照;
4.从各处理中取1mL混合液在解剖镜下观测线虫死亡情况,每重复观测线虫数150头,记录调查的总线虫数和死亡线虫数。其中线虫死亡的判定标准为:线虫僵直,用发丝针或竹丝针触碰仍不能弯曲运动;根据调查数据,计算各处理的死亡率和校正死亡率,根据药剂浓度对数值及对应根结线虫校正死亡率的几率值作回归分析,计算各处理药剂的EC50,并根据孙云沛法计算混剂的共毒系数(CTC值)。
死亡率(%)=(死亡线虫数÷调查总线虫数)×100;
校正死亡率(%)=[(处理线虫死亡率-对照线虫死亡率)÷(1-对照线虫死亡率)]×100;
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。
按照联合作用划分标准:共毒系数(CTC)≥120表现为增效作用;共毒系数(CTC)≤80表现为拮抗作用;80<共毒系数(CTC)<120表现为相加作用。实验结果见表1-3。
表1咯菌腈和唑虫酰胺复配对南方根结线虫的室内生物活性测定
Figure BDA0003751823880000041
Figure BDA0003751823880000051
由表1可知,本发明有效成分咯菌腈和唑虫酰胺复配后,在质量比为1-25:15-1范围内对防治南方根结线虫的共毒系数均大于120,表现为增效作用。
表2咯菌腈和氟烯线砜复配对南方根结线虫的室内生物活性测定
药剂名称及配比 EC50(mg/L) ATI TTI CTC
咯菌腈 35.88 100.00 -- --
氟烯线砜 1.24 2893.55 -- --
咯菌腈1:氟烯线砜10 0.89 4031.46 2639.59 152.73
咯菌腈1:氟烯线砜8 0.75 4784.00 2583.15 185.20
咯菌腈1:氟烯线砜5 0.56 6407.14 2427.96 263.89
咯菌腈1:氟烯线砜2 1.33 2697.74 1962.37 137.47
咯菌腈1:氟烯线砜1 1.21 2965.29 1496.77 198.11
咯菌腈3:氟烯线砜1 1.47 2440.82 798.39 305.72
咯菌腈5:氟烯线砜1 2.13 1684.51 565.59 297.83
咯菌腈10:氟烯线砜1 1.16 3093.10 353.96 873.86
咯菌腈20:氟烯线砜1 6.54 548.62 233.03 235.43
咯菌腈30:氟烯线砜1 11.23 319.50 190.11 168.06
咯菌腈40:氟烯线砜1 15.82 226.80 168.14 134.89
由表2可知,本发明有效成分咯菌腈和氟烯线砜复配后,在质量比为1-40:10-1范围内对防治南方根结线虫的共毒系数均大于120,表现为增效作用。
表3咯菌腈和环氧虫啉复配对南方根结线虫的室内生物活性测定
药剂名称及配比 EC50(mg/L) ATI TTI CTC
咯菌腈 35.88 100.00 -- --
环氧虫啉 6.85 523.80 -- --
咯菌腈1:环氧虫啉30 4.22 850.24 510.12 166.67
咯菌腈1:环氧虫啉20 3.63 988.43 503.61 196.27
咯菌腈1:环氧虫啉10 4.85 739.79 485.27 152.45
咯菌腈1:环氧虫啉5 1.29 2781.40 453.16 613.77
咯菌腈1:环氧虫啉3 2.71 1323.99 417.85 316.86
咯菌腈1:环氧虫啉1 6.78 529.20 311.90 169.67
咯菌腈3:环氧虫啉1 5.31 675.71 205.95 328.09
咯菌腈5:环氧虫啉1 11.62 308.78 170.63 180.96
咯菌腈10:环氧虫啉1 18.85 190.34 138.53 137.41
咯菌腈20:环氧虫啉1 24.40 147.05 120.18 122.36
咯菌腈30:环氧虫啉1 4.48 800.89 113.67 704.57
由表3可知,本发明有效成分咯菌腈和环氧虫啉复配后,在质量比为1-30:30-1范围内对防治南方根结线虫的共毒系数均大于120,表现为增效作用。
从表1-3可以看出,本发明咯菌腈与唑虫酰胺、氟烯线砜或环氧虫啉进行复配时,在一定质量比范围内,对防治南方根结线虫表现出协同增效作用,可以提高对南方根结线虫的防治效果,有效防治辣椒根结线虫病,同时可以减少活性成分的施用量,降低农药残留和防治成本。
前述对本发明的具体示例性实施方案的描述是为了说明和例证的目的。对示例性实施例进行选择和描述的目的在于解释本发明的特定原理及其实际应用,从而使得本领域的技术人员能够实现并利用本发明的各种不同的示例性实施方案以及各种不同的选择和改变。

Claims (1)

1.一种防治辣椒根结线虫病的杀线虫组合物,其特征在于,其有效成分由咯菌腈与唑虫酰胺二元复配而成,所述咯菌腈与唑虫酰胺的质量比为1-25:15-1。
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