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七星瓢虫规模化饲养的质量控制

孙毅; 万方浩   

  1. 中国农科院生物防治研究所,北京100081
  • 收稿日期:1999-06-22 修回日期:1900-01-01 出版日期:2000-02-08 发布日期:2000-02-08

Quality Control in Mass Rearing Procedure of Coccinella septempunctata L.(Col. Coccinellidae)

SUN Yi; WAN Fang-hao   

  1. Institute of Biological Control,CAAS, Bejing 100081, China
  • Received:1999-06-22 Revised:1900-01-01 Online:2000-02-08 Published:2000-02-08

摘要:

从七星瓢虫生活力、生殖力、捕食能力角度,提出了其规模化饲养的质量控制标准(可测量)及其测试办法。(1)生活力特征:体重大于26.9mg,羽化率大于87.7%,寿命达到62.9天,贮藏时间大于51.6天;(2)生殖力特征:成虫产卵前期短于13.7天,产卵雌虫率大于86.9%,产卵期大于52.9天,所产卵孵化率达到85.8%,产卵量达到4027粒;(3)捕食能力:饥饿24小时后,在220头蚜虫/m2密度下,日捕食量达到70.15头。符合此标准的七星瓢虫在捕食功能上与蚜虫饲养的试验种群相同。将此七星瓢虫以瓢蚜比1∶100释放至田间时,成虫5天后达到82.5%的防治效果,释放蛹则有2~3天滞后期。故在田间应用时,应提前2天置室温下羽化后释放。

Abstract: Quality control plays a key role in commercial production of beneficial insects. The measurable quality criteria of Coccinella septempunctata L.in mass rearing procedure are proposed in this article. (1) Life characters: bodys weight should be no less than 26.9 mg, emergence should exceed 87.7%, and adult longevity should reach 62.9 d. Furthermore, it can be stored no less than 51.63 d. (2)Fecundity characters: preovipositional period should be shorter than 13.7 d, more than 86.9% adult female should lay eggs normally. At the same time, its oviposition period should be longer than 52.9 d, and each female adult can lay more than 4027 eggs in its life. (3)Predator potentials: after starved for 24 h, the adult beetle should consume more than 70 aphids per day when 220 aphids per m2 are supplied.

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