欢迎访问《茶叶科学》,今天是

茶叶科学 ›› 2017, Vol. 37 ›› Issue (3): 229-236.

• •    下一篇

茶角胸叶甲高毒力球孢白僵菌菌株的筛选

王定锋1, 李良德1, 黎健龙2, 李慧玲1, 张辉1, 王庆森1, 吴光远1,*   

  1. 1. 福建省农业科学院茶叶研究所,福建 福安 355015;
    2. 广东省农业科学院饮用植物研究所/广东省茶树资源创新利用重点实验室,广东 广州 510640
  • 收稿日期:2017-02-10 修回日期:2017-02-24 出版日期:2017-06-15 发布日期:2019-08-22
  • 通讯作者: *gywupt@163.com
  • 作者简介:王定锋,男,硕士,助理研究员,主要从事害虫生物防治研究。
  • 基金资助:
    福建省自然科学基金项目(2015J01099)、国家茶叶产业技术体系项目(CARS-23)、福建省农业科学院茶叶研究所重点项目(2014-cys-02)

Screening of the Beauveria bassiana Strain with High Virulence to Basilepta melanopus (Coleoptera: Chrysomeloidea)

WANG Dingfeng1, LI Liangde1, LI Jianlong2, LI Huiling1, ZHANG Hui1, WANG Qingsen1, WU Guangyuan1,*   

  1. 1. Tea Research Institute, Fujian Academy of Agricultural Sciences, Fu′an 355015, China;
    2. Drinkable Plants Institute (Tea Research Center), Guangdong Academy of Agricultural Sciences / Guangdong Provincial Key Laboratory of Tea Plant Resources Innovation & Utilization, Guangzhou 510640, China;
  • Received:2017-02-10 Revised:2017-02-24 Online:2017-06-15 Published:2019-08-22

摘要: 茶角胸叶甲(Basilepta melanopus Lefevre)是一种茶树上常见的食叶性害虫,其发生为害严重影响茶叶的产量和品质。近年来,该虫在局部茶园,尤其是有机茶园中常爆发成灾。如何有效防治该害虫,已成为亟待解决的问题。本研究选择原寄主为茶园鞘翅目害虫的9个球孢白僵菌(Beauveria bassiana)菌株,依据菌落形态、菌株生长速率、产孢量、孢子萌发率、耐热力和抗紫外能力等生物学性状初步筛选出Bb338、Bb346和Bb2-1等3个生物学性状优良的菌株;在此基础上,利用浸虫法研究了3个菌株对茶角胸叶甲成虫的杀虫毒力。生测结果表明,用每毫升1×107个孢子的孢悬液处理后,球孢白僵菌Bb2-1对茶角胸叶甲成虫的累计校正死亡率达100%,僵虫率达86.11%;LT50仅为3.32βd。综合上述各生物学特性和杀虫毒力表明,筛选到的Bb2-1菌株具有生长速率快、产孢量大、耐热力和抗紫外能力强,以及对茶角胸叶甲杀虫毒力最强和杀虫速率最快等优点,在今后茶角胸叶甲的生物防治中将发挥重要的作用。

关键词: 茶角胸叶甲, 球孢白僵菌, 生物学特性, 毒力, 菌株筛选

Abstract: The beetle (Basilepta melanopus) is one of the most serious leaf-feeding insects in tea garden, which seriously affects both tea yield and quality. In recent years, the beetle often caused serious damage in some tea gardens, especially organic tea gardens. How to effectively control this pest has become a serious problem. In order to screen high virulence strains of Beauveria bassiana to B. melanopus, 9 strains of B. bassiana isolated from the coleoptera pests in tea gardens were selected as candidates. In the preliminary screening, the biological characteristics of these 9 strains, including colony morphology, growth rate, sporulation, spore germination rate, thermotolerance and UV radiation resistance were detected. According to the above biological characteristics, three strains Bb338, Bb346 and Bb2-1 were selected for further bioassay against the adult of B. melanopus. Bioassay results showed that the strain Bb2-1 was the most virulent strain to the adults of B. melanopus, which had the highest corrected mortality rates of 100%, highest cadaver rates of 86.11% and shortest LT50 of 3.32 d at a concentration of 1.0×107 conidia per milliliter. The strain Bb2-1 has the best biological characteristics and the highest virulent against the adults of B. melanopus, which would play a very important role in biocontrol of B. melanopus.

Key words: Basilepta melanopus, Beauveria bassiana, biological characteristics, virulence, strain screening

中图分类号: