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| 储蓄植物系统田间应用关键参数对七星瓢虫种群定殖及控害的影响 |
| Effects of key parameters in the field application of banker plant system on population colonization and pest control of Coccinella septempunctata |
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| DOI： |
| 中文关键词: 储蓄植物系统 七星瓢虫 笼罩试验 田间试验 |
| 英文关键词:Banker plants system Coccinella septempunctata shroud test field trials |
| 基金项目:国家自然科学青年基金（32202372）；国家重点研发计划（2023YFE0104800）；北京市农林科学院青年科学基金（QNJJ202321）；北京市农林科学院创新能力建设项目（KJCX20230115） |
| Author Name | Affiliation | | WANG Jia-Jia, LI Shu, YANG Ya-Jie, WANG Su, GU Jun-Jie, YUE Yan-Li | 1. Sichuan Agricultural University, College of Agronomy, Chengdu 611130, China
2. Beijing Academy of Agriculture and Forestry Sciences, Institute of Plant Protection, Beijing 100097, China |
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| 中文摘要: |
| 储蓄植物系统（Banker plant system）是近年来新兴的用于提升天敌昆虫高效可持续防控害虫的保护型生物防治的技术，然而在田间应用中效果不稳定，这主要是由于储蓄植物系统的田间应用关键参数并不明确。七星瓢虫Coccinella septempunctata作为我们熟知的优势天敌昆虫，田间应用时因为定殖率低，严重限制了其可持续控害效率。本试验对已构建的七星瓢虫储蓄植物系统进行田间试验验证，探究了不同替代猎物的初始密度等关键参数对天敌昆虫七星瓢虫的种群变化及对靶标害虫桃蚜Myzus persicae的控害效果。试验结果表明，当储蓄植物系统接种替代猎物豌豆修尾蚜Megoura crassicauda不同初始密度时，对七星瓢虫个体数量及桃蚜密度均有显著差异，初始接种密度为300的Y300、N300处理组在21~28 d时桃蚜的虫口数量显著低于其他处理组，同时七星瓢虫定殖率在7~14 d时显著高于其他处理组。与对照相比，初始设置1 d笼罩去除在7~14 d内有效帮助七星瓢虫个体数量维持，而且有助于卵、幼虫种群的建立。在距离储蓄植物系统9 m处，七星瓢虫成虫定殖率高于其他处理组，由此证明七星瓢虫储蓄植物系统作用距离可达9 m处，有助于七星瓢虫种群维持发挥可持续控害作用。本研究为科学地田间应用提供理论支撑，有助于完善优化储蓄植物系统可持续控害生态策略。 |
| 英文摘要: |
| Banker plant system is an emerging protective biological control technology for improving the efficient and sustainable pest control of natural enemy insects in recent years, but the effect is unstable in field application, mainly due to the lack of clarity of key parameters in the field application of banker plant system. Coccinella septempunctata, as a high efficiency predator, severely limits its sustainable pest control efficiency due to its low colonization rate in the field. The study explored how key parameters such as the initial density of different alternative prey affect the population dynamics of the predator insect, C. septempunctata, and its efficacy in controlling the target pest, Myzus persicae. The experimental results indicated that when the alternative prey, Megoura crassicauda, was inoculated at different initial densities in the banker plant system, there were significant differences in the number of individual C. septempunctata and the density of M. persicae. The Y300 and N300 treatment groups, with an initial inoculation density of 300, had significantly lower M. persicae populations between 21 to 28 days compared to other treatment groups, and the colonization rate of C. septempunctata was significantly higher between 7 to 14 days compared to other groups. Compared to the control, the initial setup of a 1-day cover removal effectively helped maintain the number of C. septempunctata individuals and was conducive to the establishment of egg and larval populations within 7 to 14 days. At a distance of 9 meters from the banker plant system, the colonization rate of adult C. septempunctata was higher than in other treatment groups, proving that the effective range of the C. septempunctata banker plant system can reach up to 9 meters, which was beneficial for the maintenance of C. septempunctata populations and the sustainable control of pests. This study provides theoretical support for the scientific application in the field, which helps to improve and optimize sustainable pest control ecological strategies in conservation planting systems. |
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