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中国农学通报

中国农学通报 ›› 2019, Vol. 35 ›› Issue (32): 121-125.doi: 10.11924/j.issn.1000-6850.casb18080021

• 植物保护 农药 • 上一篇    下一篇

密度对七星瓢虫不同虫态生存的影响

王小强1, 曹馨月2, 郑珍蕾1, 蒲德强1, 李跃建3, 房超3, 蔡鹏3   

  1. 1.四川省农业科学院经济作物育种栽培研究所;2.四川省农业科学院茶叶研究所;3.四川省农业科学院园艺研究所
  • 收稿日期:2018-08-06 修回日期:2019-05-16 接受日期:2019-05-22 出版日期:2019-11-19 发布日期:2019-11-19
  • 通讯作者: 蒲德强
  • 基金资助:
    四川省苗子工程重点项目“七星瓢虫规模化繁育过程中的储藏技术研究”(18MZGC0224)；四川省烟草公司科技项目“七星瓢虫工厂化 开发与应用”(SCYC201805)；国家重点研发计划项目“葡萄及瓜类化肥农药减施技术集成研究与示范”(2018YFD020082)。

Densities Affect the Survival of Coccinella septempunctata (Coleoptera: Coccinellidae) at Diverse Stages

  • Received:2018-08-06 Revised:2019-05-16 Accepted:2019-05-22 Online:2019-11-19 Published:2019-11-19

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摘要： 为探究不同容积-密度组合饲养七星瓢虫对其各历期存活率及成虫重量的影响,本研究在温度25℃、相对湿度60-80%,光照周期10L:14D条件下,设置3种容积 (1000ml、750ml、500ml)与3种密度 (25头、35头、45头)组合下观察统计不同历期七星瓢虫存活数,并对成虫称重。试验结果表明,密度-容积组合对低龄期幼虫存活的影响显著高于其它历期(P<0.05)。其中,1-2龄在500ml下的存活率25头、35头、45头均显著的低于750ml下的3种密度及1000ml-25头,依次为57.33%,48.57%,40.74%,其存活率的最佳容积与密度组合为750ml-35头,存活率达到88.57%；在3龄、4龄、蛹期及成虫时,其最佳饲养组合分别为500ml-25头、1000ml-25头、750ml-35头及750ml-35头,其存活率分别为93.33%、94.49%、92.38%和97.78%,但该最优组合在统计学上与其它组合无显著差异(P>0.05)；对初羽化成虫称重表明,除1000ml 25与45头/盒间有显著差异外(P<0.05),其余体积与密度组合下成虫体重均无显著差异 (P>0.05)。综上所述,在七星瓢虫规模化饲养中,幼虫阶段的低龄期存活率受密度及容器大小影响严重,当密度为25-45头时,应避免1-2龄阶段在小于500ml条件下饲养,对七星瓢虫规模化饲养条件的设置提供一定理论支持。

关键词: 盈江县, 盈江县, GIS, 耕地分级, 基本农田布局

Abstract: In order to clarify the effects of different volume and density on survival of diverse stages and weight of adult of Coccinella septempunctata, the study of three volume (1000ml, 750ml, 500ml) and three density (25 heads, 35 heads, 45 heads) groups were executed under constant temperature (25±1℃), relative humidity (60-80) and a 10:14 (L:D) hours photoperiod. The results showed that the effect of different groups of density and volume on survival of young larvae was significantly higher than that of other diverse stages (P<0.05). The survival rates of 1-2nd instar, which groups of 500ml-25, 500ml-35 and 500ml-45 heads were significantly hower than the groups of 750ml-25, 750ml-35,750ml-45 and 1000ml-25 heads were 57.33%,48.57%,40.74% respectively, and the highest survival rate of group of volume and density was 750ml-35heads, 88.57%. The best combination of volume and density of survival rates of 3rd instar, 4th instar, pupa and adult were 93.33%, 94.49% , 92.38% and 97.78%, which of were 500ml-25, 1000ml-25, 750ml-35 and 750ml-35 heads, respectively. But there were no significant relations between best combinations and the other combinations In statistics (P>0.05). The weights of C.septempunctata adults under group of volume and density had no Significant regulations were found except that the 1000-25 and 1000ml-45 heads per box were significantly differences (P<0.05). In mass rearing, the survival rate of the larval stage of C.septempunctata is seriously affected by the density and the size of the container, such as the rearing condition of 500ml-25, 500ml-35 and 500ml-45 heads should be avoidedSespecially. These results provide same important theoretical basis for the establishment of large-scale feeding conditions of C.septempunctata.