中国北方越冬代异色瓢虫取食及繁殖力研究

发布时间：2019-01-27 21:29

【摘要】：为了明确秋季经自然低温驯化后北方种群越冬代异色瓢虫是否滞育,室内条件下测定了越冬代异色瓢虫吉林和北京种群的取食及繁殖特性。结果表明:试验前对异色瓢虫喂饲豌豆蚜、20%蜂蜜水或清水3 d,两种群各处理每对异色瓢虫在饲喂蚜虫当日即可取食,且随饲喂天数的增加,各处理均保持较高的取食量,试验周期(20 d)内两种群各处理每对异色瓢虫取食蚜虫总量均超过4 000头,种群内各处理逐日取食量和总取食量均无显著差异;连续饲喂20 d,两种群异色瓢虫均可正常繁殖,吉林种群各处理雌虫产卵前期(12.1~12.5 d)均略长于北京种群(11.0~11.4 d),而平均单雌产卵总量(292.6~317.2粒)略低于北京种群(331.9~355.8粒),但均无显著性差异。这可以从生物学角度来判断北方秋季野外采集的越冬代异色瓢虫均未滞育。
[Abstract]:In order to determine whether there is diapause in the overwintering generation of the Northern populations after natural low temperature acclimation in autumn, the feeding and reproduction characteristics of the overwintering populations in Jilin and Beijing were determined under indoor conditions. The results showed that before the experiment, 20% honey water or water was used to feed the pea aphids. Each pair of the two species could feed on the same day as the aphids, and with the increase of feeding days, the feeding amount of each treatment was higher. In the experiment period (20 days), the total feeding aphids of each pair of the two populations were more than 4 000, and there was no significant difference in the daily feeding amount and the total feeding amount between the two treatments. After continuous feeding for 20 days, the two populations could reproduce normally. In Jilin population, the pre-oviposition period (12.1g / 12.5d) of the female population was slightly longer than that of the Beijing population (11.00.11.4 d),). However, the average oviposition amount of single female (292.6% 317.2) was slightly lower than that of Beijing population (331.9355.8), but there was no significant difference between them. From the biological point of view, it can be concluded that none of the overwintering species collected in the autumn in North China has diapause.
【作者单位】：吉林农业大学生物防治研究所;白河林业局;
【基金】：吉林省重点科技攻关项目(20160204010NY)
【分类号】：S476.2

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