| 吴道慧，彭孝琴，张鹏英，黄禹禹，齐国君，陈婷，陈国华，张晓明，柳青,2020,紫茎泽兰粗提物对草地贪夜蛾生长发育及繁殖的影响[J].环境昆虫学报,(6):1305-1313 |
| 紫茎泽兰粗提物对草地贪夜蛾生长发育及繁殖的影响 |
| Effects of Eupatorium adenophorum extract on growth, development and reproduction of Spodoptera exigua |
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| DOI： |
| 中文关键词: 草地贪夜蛾 紫茎泽兰 粗提物 生长发育 繁殖 |
| 英文关键词:Spodoptera frugiperda Eupatorium adenophorum extracts growth and development reproduction |
| 基金项目:云南省高校滇西昆虫资源保护与利用重点实验室建设项目（云教发[2019]57号）；广东省重点领域研发计划项目（2020B020223004）；国家重点研发计划（2017YFC1200600) |
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| 中文摘要: |
| 为明确紫茎泽兰粗提物对草地贪夜蛾生长发育及繁殖的影响，在实验室条件下分别利用4个不同稀释浓度（20、15、10、5倍）的紫茎泽兰粗提物处理玉米叶片后喂养草地贪夜蛾初孵幼虫，记录各虫态的发育历期、存活率、重量、成虫寿命以及后代性比、F2代卵孵化率、F2代卵的发育历期。结果表明，随着紫茎泽兰粗提物浓度的升高，草地贪夜蛾各虫态的发育历期延长，5倍稀释液处理下蛹的发育历期最长，达20.27 d，10倍稀释液处理下幼虫的发育历期最长，为21.46 d；随着处理浓度的增加，各虫态的重量逐渐降低，且存活率呈下降趋势，其中粗提物对蛹存活率的影响最大，对1~3龄幼虫存活率的影响较小；随着处理浓度的升高成虫的寿命均缩短，且雌成虫寿命长于雄成虫；随着处理浓度的升高，草地贪夜蛾的产卵前期和F2代卵发育历期延长，产卵期缩短；单雌产卵量、后代性比和卵的孵化率降低。总的来说，紫茎泽兰粗提物对草地贪夜蛾的生长发育及繁殖均造成消极影响。5倍稀释液对草地贪夜蛾的生长发育及繁殖的影响最显著，可作为草地贪夜蛾防治研究中的重要植物源杀虫剂材料。 |
| 英文摘要: |
| In order to know the influence of extracts from Eupatorium adenophorum to the growth, development and reproduction of Spodoptera frugiperda, the crude extracts of E. adenophorum were diluted to four different concentrations (20-fold, 15-fold, 10-fold, 5-fold) to treat maize leaves before feeding S. frugiperda under laboratory conditions. Afterwards, the instar larvae and pupae development period, survival rate, weight, adult longevity, offspring sex ratio, F2 generation egg hatchability, and developmental period of F2 generation egg were investigated and recorded in this study. The results showed that the developmental period of larvae and pupae of each instar were prolonged with the increase of extract concentration. The pupae held the longest developmental duration under the 5-fold concentration and its duration was reached to 20.27 d, while the larvae had the longest developmental duration and its duration was reached to 21.46 d under 10-fold concentration treatment. The weight of larvae and pupae of each instar decreased with the increase of the treatment concentration, and the survival rate of each developmental stage showed a downward trend. The crude extract had the greatest effect on the survival rate of pupae, and had the least effect on the survival rate of the 1st~3rd instar larvae than other stage. The adult longevity was shortened, and the longevity of female adults was longer than that of male adults with the increase of treatment concentration. With the increase of treatment concentration, preoviposition duration and the developmental period of F2 generation eggs of the S. frugiperd were prolonged. Meanwhile, oviposition duration was shortened, single female oviposition, sex ratio, and the hatching rate of F2 generation eggs were reduced. Overall, the extract of E. adenophorum had negative effects on the growth, development and reproduction of S. frugiperd. It was found that the extract of 5-fold concentration had the most significant effect on the growth, development and reproduction S. frugiperd, it could be used as an important botanical insecticide to control S. frugiperd. |
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