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中国生物防治学报 ›› 2022, Vol. 38 ›› Issue (6): 1443-1448.DOI: 10.16409/j.cnki.2095-039x.2022.03.021

• 研究论文 • 上一篇    

淡翅小花蝽对豆大蓟马的捕食功能反应及猎物偏好性

邱海燕1, 付步礼1, 何石兰2, 刘奎1   

  1. 1. 中国热带农业科学院环境与植物保护研究所/农业农村部热带作物有害生物综合治理重点实验室/海南省热带作物病虫害生物防治工程技术研究中心, 海口 571101;
    2. 海南省农业学校, 海口 571101
  • 收稿日期:2021-11-17 发布日期:2022-12-16
  • 通讯作者: 刘奎,博士,研究员,E-mail:lk0750@163.com
  • 作者简介:邱海燕,硕士,助理研究员,E-mail:salangane85@163.com
  • 基金资助:
    国家重点研发计划(2017YFD0202100);中国热带农业科学院“天敌昆虫创新利用团队”(1630042017010);海南省院士创新平台科研专项资金资助(YSPTZX202021)

Functional Response and Predation Preference of Orius tantillus to Megalurothrips usitatus

QIU Haiyan1, FU Buli1, HE Shilan2, LIU Kui1   

  1. 1. The Ministry of Agriculture Key Laboratory of Integrated Pest Management of Tropical Crops/Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences/Engineering Research Center of Tropical Crops Pest Biological Control, Haikou 571101, China;
    2. Hainan Agriculture School, Haikou 571101, China
  • Received:2021-11-17 Published:2022-12-16

摘要: 为评价淡翅小花蝽对豆大蓟马的控害潜能,在室内测定了淡翅小花蝽各虫态对豆大蓟马2龄若虫的捕食能力、寻找效应、捕食选择性及自身密度干扰反应。结果表明:一定的猎物密度范围内,淡翅小花蝽各虫态对豆大蓟马的捕食作用均符合Holling Ⅱ功能反应模型,淡翅小花蝽各虫态的捕食量均随猎物密度的增加而升高,搜寻效应均随猎物密度增加而下降。淡翅小花蝽若虫的捕食能力随龄期的增长而提高,5龄若虫的日捕食能力最强,为42.9头。淡翅小花蝽5龄若虫对2龄若虫捕食率随其自身密度的增加而下降,经拟合获得的干扰模型为E=0.412P-0.822,分摊竞争模型为I=1.042lgP+0.071。猎物偏好性试验结果表明,淡翅小花蝽5龄若虫和成虫均对豆大蓟马2龄若虫的偏好性明显高于成虫。研究结果表明淡翅小花蝽对豆大蓟马具有较好的防控潜能。

关键词: 淡翅小花蝽, 豆大蓟马, 捕食作用, 搜寻效应, 捕食偏好

Abstract: Orius tantillus (Motschulsky) is one of the local nature enemies of thrips in Hainan province, but its predatory capacity on Megalurothrips usitatus has never been determined. In this work, the functional response, searching efficiency, predation preference and interference response of O. tantillus on M. usitatus were studied under laboratory conditions. The results showed that the predation of O. sauteri on M. usitatus followed the Holling II functional response. The predation amount of the 1st-5th instar nymphs and adults of O. tantillus on the 2nd instar nymphs of M. usitatus were all positively correlated with the prey density, while their searching efficiency were negatively correlated with the prey density. The predation ability of the nymphs increased with increasing instar stage, reaching the highest at the 5th instar nymphs with a a'/Th value of 42.9 thrips. The predation of the 5th instar nymphs was strongly affected by intraspecific interference, and the average daily predation amount decreased with the increase of the predator density. The interference model was E=0.412P-0.822, the apportionment competition model was I=1.042lgP+0.071. The predation preference results showed that both the 5th instar nymphs and adults of O. tantillus strongly preferred the 2nd instar prey nymphs. These results suggest that O. tantillus is of strong control potential against the 2nd instar nymphs of M. usitatus.

Key words: Orius tantillus, Megalurothrips usitatus, predation, searching efficiency, predation preference

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