CN108432753B - 一种黄曲条跳甲引诱剂及其制备方法 - Google Patents
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Abstract
本发明公开了一种黄曲条跳甲引诱剂及其制备方法,以液体石蜡为溶剂,将100μg/ml的庚烷、辛醛、苯甲醛、顺‑3‑己烯乙酸酯、丁酸甲酯、萝卜硫素、α‑石竹烯、香橙烯、α‑蒎烯、2‑异丙基‑5‑甲基‑1‑庚醇进行相同质量混合而成。该引诱剂成分均是从寄主植物挥发物或提取物中鉴定、筛选出来的活性组分,其组合配方具有不易产生抗性、诱集效果持久的特点。该引诱剂可使黄曲条跳甲成虫迅速被诱集到目标诱捕区,诱捕持效期可达20天,可大幅减少十字花科蔬菜中黄曲条跳甲的田间种群数量,提高黄曲条跳甲的防治效果,可作为一种重要绿色、安全、可持续的无公害技术。
Description
技术领域
本发明属于蔬菜害虫生物防治技术领域,具体涉及一种黄曲条跳甲引诱剂及其制备方法。
背景技术
黄曲条跳甲phyllotreta striolata(Fabricius)俗称黄跳蚤、土跳蚤、跳虱等,属鞘翅目叶甲科。黄曲条跳甲为害的寄主包括8科19种植物,是严重为害十字花科蔬菜的世界性害虫(Soroka et al., 2005)。黄曲条跳甲在我国分布广泛,各地发生代数不同,世代重叠严重,而且近年来在广东、福建部分地区的危害甚至超过了小菜蛾(Lee et al., 2014;高泽正等,2000)。
自然生态环境中存在着大量与昆虫生活密切相关的化学信息物质,而这些植物挥发性次生物质是昆虫借以寻找寄主或者产卵场所的一类它感信息化合物,它调控着昆虫对寄主植物的定向、识别和取食等行为(杜家纬,2001),在寄主植物与昆虫相互关系中作为嗅觉介体起作用(Ivo and Monika, 2014)。许多植物在特定的时间和空间都会产生具有各自特性的气味,植食性昆虫以这些气味为线索准确寻找和定位寄主植物(Bruce et al.,2005)。通过黄曲条跳甲寄主气味的电生理行为和选择反应研究,我们发现庚烷、辛醛、苯甲醛、顺-3-己烯乙酸酯、丁酸甲酯、萝卜硫素、α-石竹烯、香橙烯、(1R)-(+)-α-蒎烯、2-异丙基-5-甲基-1-庚醇在电生理行为和选择反应上均呈现正相关,根据其不同组分配比制得引诱剂。本引诱剂筛选自十字花科蔬菜包括青菜、甘蓝、白菜、花椰菜等多种寄主挥发物或提取物进行活性行为鉴定,充分利用植物挥发性物质在害虫诱杀方面的天然优势,通过设计大量的行为试验,我们开发出对黄曲条跳甲具有吸引作用的引诱剂,并结合昆虫黄板对其进行有效的捕杀。
发明内容
本发明的目的在于提供一种黄曲条跳甲的引诱剂及其制备方法,该引诱剂成分均是从寄主植物挥发物或提取物中鉴定、筛选出来的活性组分,其组合配方具有不易产生抗性、诱集效果持久的特点。该引诱剂可使黄曲条跳甲成虫迅速被诱集到目标诱捕区,诱捕持效期可达22天,可大幅减少十字花科蔬菜中黄曲条跳甲的田间种群数量,提高黄曲条跳甲的防治效果,可作为一种重要绿色、安全、可持续的无公害技术。
为实现上述目的,本发明采用如下技术方案:
一种黄曲条跳甲的引诱剂是以液体石蜡为溶剂,将100μg/ml的庚烷、辛醛、苯甲醛、顺-3-己烯乙酸酯、丁酸甲酯、萝卜硫素、α-石竹烯、香橙烯、(1R)-(+)-α-蒎烯、2-异丙基-5-甲基-1-庚醇的单一组分溶液按相同质量混合而成。
上面所述的庚烷、辛醛、苯甲醛等10种标准化合物均为其寄主十字花科蔬菜的挥发物或提取物,标准化合物试剂购自Sigma Aldrich 公司。
制备如上所述的黄曲条跳甲的引诱剂的方法包括以下步骤:
(1)100μg/ml的单一组分溶液的制备
100μg/ml的庚烷溶液的制备:将事先配制好的10μg/μl的庚烷标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的辛醛溶液的制备:将事先配制好的10μg/μl的辛醛标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的苯甲醛溶液的制备:将事先配制好的10μg/μl的苯甲醛标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的顺-3-己烯乙酸酯溶液的制备:将事先配制好的10μg/μl的顺-3-己烯乙酸酯标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的丁酸乙酯溶液的制备:将事先配制好的10μg/μl的丁酸乙酯标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的萝卜硫素溶液的制备:将事先配制好的10μg/μl的萝卜硫素标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的α-石竹烯溶液的制备:将事先配制好的10μg/μl的α-石竹烯标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的香橙烯溶液的制备:将事先配制好的10μg/μl的香橙烯标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的(1R)-(+)-α-蒎烯溶液的制备:将事先配制好的10μg/μl的(1R)-(+)-α-蒎烯标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的2-异丙基-5-甲基-1-庚醇溶液的制备:将事先配制好的10μg/μl的2-异丙基-5-甲基-1-庚醇标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
(2)黄曲条跳甲引诱剂的制备
将步骤(1)得到的100μg/ml的庚烷、辛醛、苯甲醛、顺-3-己烯乙酸酯、丁酸甲酯、萝卜硫素、α-石竹烯、香橙烯、(1R)-(+)-α-蒎烯、2-异丙基-5-甲基-1-庚醇溶液进行相同质量混合,制得引诱剂。
本发明的显著优点在于:
(1)对环境安全、无污染
本发明制得的黄曲条跳甲的引诱剂的组成成分是十字花科蔬菜挥发物或提取物中筛选出来的,均为天然化合物,不容易引起昆虫产生抗性;因此植物源引诱剂的施用对环境是相对安全的;
(2)引诱剂成分种类较多,可增加昆虫自身对环境适应性的时间
本发明所制得的植物源引诱剂是由多种寄主植物挥发物或提取物所得,种类较多,黄曲条跳甲对引诱剂产生适应性的时间较长,有利于结合其它防治措施减少黄曲条跳甲的为害;
(3)本发明研制的引诱剂原料易得、贮存,运输方便,经济实用。
(4)克服了性信息素只能诱杀雄性害虫的弊端,该引诱剂可以对黄曲条跳甲雌雄成虫起到双杀的效果。
附图说明
图1为黄曲条跳甲雌成虫对引诱剂的选择行为反应示意图;
图2为黄曲条跳甲雄成虫对引诱剂的选择行为反应示意图,*表示黄曲条跳甲的定向选择行为反应差异显著(P<0.05)。
具体实施方式
本发明用下列实施例来进一步说明本发明,但本发明的保护范围并不限于下列实施例。
实施例1
一、黄曲条跳甲引诱剂配方的制备
1.1 100μg/ml的单一组分溶液的制备
100μg/ml的庚烷溶液的制备:将事先配制好的10μg/μl的庚烷标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的辛醛溶液的制备:将事先配制好的10μg/μl的辛醛标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的苯甲醛溶液的制备:将事先配制好的10μg/μl的苯甲醛标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的顺-3-己烯乙酸酯溶液的制备:将事先配制好的10μg/μl的顺-3-己烯乙酸酯标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的丁酸乙酯溶液的制备:将事先配制好的10μg/μl的丁酸乙酯标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的萝卜硫素溶液的制备:将事先配制好的10μg/μl的萝卜硫素标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的α-石竹烯溶液的制备:将事先配制好的10μg/μl的α-石竹烯标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的香橙烯溶液的制备:将事先配制好的10μg/μl的香橙烯标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的(1R)-(+)-α-蒎烯溶液的制备:将事先配制好的10μg/μl的(1R)-(+)-α-蒎烯标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
100μg/ml的2-异丙基-5-甲基-1-庚醇溶液的制备:将事先配制好的10μg/μl的2-异丙基-5-甲基-1-庚醇标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;
1.2 黄曲条跳甲引诱剂的制备
将步骤(1)得到的100μg/ml的庚烷、辛醛、苯甲醛、顺-3-己烯乙酸酯、丁酸甲酯、萝卜硫素、α-石竹烯、香橙烯、(1R)-(+)-α-蒎烯、2-异丙基-5-甲基-1-庚醇溶液进行相同质量混合,制得引诱剂。
二、黄曲条跳甲对各组分及混配物的触角电位(EAG)反应
将20μl样品溶液均匀滴在长5cm、宽0.5cm的“V”字形滤纸条上,放入巴斯德滴管中,滴管末端连接刺激气流控制装置,送气管管口与触角纵向垂直,并与触角相距1cm。调节连续气体流量为124ml/min,刺激气体流量为20ml/min,每次刺激时间为0.2s。两次刺激之间间隔40s,以保证触角感觉器官功能的完全恢复。各组分及混合物在一根触角上平行刺激3次取平均值,至少重复试验5根触角。各组分及混合物的EAG相对反应值以液体石蜡作为对照。对于每一待测样品,刺激顺序为液体石蜡、待测样品、液体石蜡。前后两次参照和对照取平均值。
EAG反应相对值=待测样品的EAG反应值-液体石蜡平均EAG反应值。
表1 黄曲条跳甲雌雄成虫对引诱剂组分及混合物的EAG反应
注:表中数据为平均值±标准误,同一列数字后字母表示在0.05水平上差异性显著。
如表1所示,EAG反应结果表明,不管是雌虫还是雄虫,与对照相比,黄曲条跳甲对引诱剂各组分及混合物的EAG反应相对值均显著高于对照;除了辛醛和顺-3-己烯乙酸酯外,混合物的EAG反应相对值均显著高于引诱剂各个组分(P<0.05),雌虫对混合物的EAG反应相对值最高为1.59±0.37mv,雄虫为1.46±0.26mv,黄曲条跳甲对引诱剂均表现出了较强的电生理反应相对值。
实施例2
采用Y型嗅觉仪测定黄曲条跳甲对引诱剂单组分的定向行为反应(由本实验室根据嗅觉仪基本原理进行改进,授权专利号为:ZL201020239767.7)。Y型管主臂20cm,两臂长度各为10cm,两臂夹角90℃。两臂管末用硅胶管按序接上蒸馏水瓶和活性炭瓶,最后活性炭瓶开口于大气中,昆虫释放瓶处用纱布连于抽气装置。将滤纸条剪成5cm × 1cm,折成“V”形,置于陷阱入口玻璃管中。分别取100μl上述步骤1.2得到的混配物均匀滴于滤纸条上放入一边的味源瓶中,另一边以滴有100μl的液体石蜡的滤纸作为参照,抽气气流流速为1L/min,分别进入两管的气流经过活性炭过滤和蒸馏水加湿。取龄期一致黄曲条跳甲雌雄成虫置于昆虫释放瓶中,雌雄每次各为20头,重复5次,每次测完即用棉球蘸取无水乙醇Y形管内外壁并烘干,然后调换Y形管两臂与味源瓶、对照,以消除两臂的几何误差对黄曲条跳甲行为可能造成的影响。将试虫放入Y形管的昆虫释放瓶中开始试验,待2个小时后统计实验结果,停留在Y形管主臂上的黄曲条跳甲均视为无反应。结果表明,庚烷、辛醛、苯甲醛、顺-3-己烯乙酸酯、丁酸甲酯、萝卜硫素、α-石竹烯、香橙烯、(1R)-(+)-α-蒎烯、2-异丙基-5-甲基-1-庚醇分别对黄曲条跳甲雌成虫的引诱量为5.12±1.12头、8.32±1.99头、6.12±1.09头、7.82±1.22头、5.54±0.55头、4.62±0.51头、6.01±0.98头、4.22±0.49头、5.39±0.71头、6.62±0.80头,对雄成虫的引诱量分别为4.10±0.43头、8.98±1.30头、7.01±0.87头、7.59±0.97头、5.03±0.77头、5.31±0.62头、6.72±0.80头、6.20±0.69头、5.53±0.63头、6.80±0.78头。
实施例3
采用Y型嗅觉仪测定黄曲条跳甲对混配物的定向行为反应。结果表明,本实验配制的黄曲条跳甲引诱剂对黄曲条跳甲雌成虫的引诱量为15.23±3.12头,对雄成虫的引诱量为14.10±3.22头,液体石蜡对黄曲条跳甲雌成虫的引诱量为3.31±0.36头,对雄成虫的引诱量为4.10±0.53头,本发明的引诱剂均显著高于单个组分和对照石蜡油的引诱量。
由图1和图2结果可以看出,该混配物对黄曲条跳甲具有显著的引诱作用。该引诱剂制备过程中筛选了大量的寄主植物化合物,经过对黄曲条跳甲的电生理行为和选择行为反应,最终制得本发明。
以上所述仅作为本发明的实施方式和例子,在本专业技术领域范围内并不脱离本发明原理的前提下,对其进行等效变换以及改进,均视为本发明的保护范围。
Claims (2)
1.一种黄曲条跳甲引诱剂,其特征在于:所述的引诱剂是以液体石蜡为溶剂,将100μg/ml的庚烷、辛醛、苯甲醛、顺-3-己烯乙酸酯、丁酸甲酯、萝卜硫素、α-石竹烯、香橙烯、(1R)-(+)-α-蒎烯、2-异丙基-5-甲基-1-庚醇的单一组分溶液按相同质量混合而制得引诱剂。
2.一种制备如权利要求1所述的黄曲条跳甲引诱剂的方法,其特征在于:首先配制单一组分溶液,然后将单一组分溶液按相同质量混合,制得引诱剂;具体包括如下步骤:(1)100μg/ml的单一组分溶液的制备100μg/ml的庚烷溶液的制备:将事先配制好的10μg/μl的庚烷标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;100μg/ml的辛醛溶液的制备:将事先配制好的10μg/μl的辛醛标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;100μg/ml的苯甲醛溶液的制备:将事先配制好的10μg/μl的苯甲醛标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;100μg/ml的顺-3-己烯乙酸酯溶液的制备:将事先配制好的10μg/μl的顺-3-己烯乙酸酯标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;100μg/ml的丁酸甲酯溶液的制备:将事先配制好的10μg/μl的丁酸甲酯标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;100μg/ml的萝卜硫素溶液的制备:将事先配制好的10μg/μl的萝卜硫素标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;100μg/ml的α-石竹烯溶液的制备:将事先配制好的10μg/μl的α-石竹烯标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;100μg/ml的香橙烯溶液的制备:将事先配制好的10μg/μl的香橙烯标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;100μg/ml的(1R)-(+)-α-蒎烯溶液的制备:将事先配制好的10μg/μl的(1R)-(+)-α-蒎烯标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;100μg/ml的2-异丙基-5-甲基-1-庚醇溶液的制备:将事先配制好的10μg/μl的2-异丙基-5-甲基-1-庚醇标准化合物取10μl加入到990μl的液体石蜡中,并均匀混合;(2)黄曲条跳甲引诱剂的制备将步骤(1)得到的100μg/ml的庚烷、辛醛、苯甲醛、顺-3-己烯乙酸酯、丁酸甲酯、萝卜硫素、α-石竹烯、香橙烯、(1R)-(+)-α-蒎烯、2-异丙基-5-甲基-1-庚醇溶液进行相同质量混合,制得引诱剂。
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