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中国生物防治学报 ›› 2020, Vol. 36 ›› Issue (5): 708-713.DOI: 10.16409/j.cnki.2095-039x.2020.05.006

• 研究论文 • 上一篇    下一篇

贮藏前补充人工饲料对七星瓢虫低温耐受力的影响

孙元星, 郝亚楠, 李明凌   

  1. 甘肃农业大学植物保护学院/甘肃省农作物病虫害生物防治工程实验室, 兰州 730070
  • 收稿日期:2020-02-16 出版日期:2020-10-08 发布日期:2020-11-20
  • 通讯作者: 孙元星
  • 作者简介:孙元星,博士,副教授,E-mail:sunyx1988@126.com
  • 基金资助:
    甘肃农业大学伏羲青年英才培养计划(Gaufx-03Y05);国家自然科学基金(31960561);甘肃省青年科技人才托举工程项目(GKXTJ20181126)

Effect of Supplementation of Artificial Diet before Storage on Cold Tolerance of Coccinella septempunctata

SUN Yuanxing, HAO Yanan, LI Mingling   

  1. College of Plant Protection, Gansu Agricultural University/Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province, Lanzhou 730070, China
  • Received:2020-02-16 Online:2020-10-08 Published:2020-11-20

摘要: 七星瓢虫是一种重要的捕食性天敌,在生物防治中应用广泛。为了探究贮藏前补充人工饲料对该瓢虫低温耐受力的影响,本研究通过在贮藏前对新羽化成虫饲喂人工饲料(简称AD)及豌豆蚜(对照,简称AP),以6℃下不同时间后的适合度来评价两个处理的低温耐受力。结果表明:随着贮藏时间延长,AD成虫的存活率呈下降趋势,在60 d时降至80%,但AP在整个贮藏期均具有较高存活率(>95%)且AP-45显著高于AD-45;AD成虫体质量损失随贮藏时间延长也显著增加,但均低于AP;AD-60仍具较高生殖力(产卵量为46.4粒,孵化率为80.6%),与AP-60差异不显著。结果表明人工饲料可作为七星瓢虫成虫贮藏前的一种替代食物,将在进一步开发经济、高效的低温贮藏技术中发挥重要作用。

关键词: 低温贮藏, 七星瓢虫, 人工饲料, 生物防治

Abstract: Coccinella septempunctata is an important biocontrol agent and play critical roles in many biological control programs. In order to explore the effect of supplementation of artificial diet before storage on the cold tolerance of C. septempunctata, in this study, the newly emerged adults were fed with artificial diet (called AD) or pea aphid (served as control, and called AP) and then their post-storage fitness was measured after being stored at 6℃ for different periods. After that, the cold tolerance of the two treatments was evaluated. The results showed that the survival of AD adults decreased with prolonged storage and decreased to 80% at 60 days after storage, but AP adults had sustained high survival (>95%) during the whole storage periods, and survival of AP-45 was significantly higher than that of AD-45. The weight loss of AD adults was greatly decreased with prolonged storage, but was less than AP. AD-60 still had relatively high reproductive capabilities (number of oviposition was 46.4, and egg hatch rate was 80.6%), which were similar to those of AP-60. These results indicated that artificial diet could be used as an effective alternative pre-storage diet, and would play important roles in further developing cost-effective storage techniques.

Key words: cold storage, Coccinella septempunctata, artificial diet, biological control

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