| ,2014,冷藏米蛾卵对子代螟黄赤眼蜂质量的影响[J].环境昆虫学报,(4):565-571 |
| 冷藏米蛾卵对子代螟黄赤眼蜂质量的影响 |
| Cold storage of Corcyra cephalonica eggs affects the quality of Trichogramma chilonis offspring |
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| DOI： |
| 中文关键词: 米蛾卵 螟黄赤眼蜂 冷藏 质量 子代 |
| 英文关键词:Corcyra cephalonica eggs Trichogramma chilonis cold storage quality offspring |
| 基金项目:国家重点基础发展计划（973）项目(2013CB127602）；广东省农业科学院院长基金项目（201405） |
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| 中文摘要: |
| 螟黄赤眼蜂Trichogramma chilonis Ishii在华南地区被广泛应用于甘蔗螟虫的生物防治，米蛾Corcyra cephalonica (Stainton)卵是工厂化繁育螟黄赤眼蜂的主要替代寄主，常常需要冷藏以满足生产的需要。本文通过分析子代雌蜂的平均寿命、寄生量、存活率和生命表等参数的变化，评价了在4℃条件下冷藏紫外杀胚米蛾卵对子代赤眼蜂质量的影响。结果表明，螟黄赤眼蜂几乎不能寄生冷藏60 d的米蛾卵。总体来说，随米蛾卵冷藏时间的延长，F1代单雌蜂的平均寿命与寄生量呈下降趋势，不过在储存期30 d时，寄生量出现了一个反常高峰。在储存期15 d时，F2代羽化率与雌性比例最高，净增值率（R0）、内禀增长率（rm）和周限增长率（λ）均有不同程度的下降，而世代平均周期（Tc）和种群倍增时间（T2）则相应延长。因此，冷藏米蛾卵导致子代螟黄赤眼蜂的质量下降，经紫外杀胚处理的米蛾卵在4℃条件下冷藏时间超过45 d后在生产中需要审慎处理。 |
| 英文摘要: |
| As a factitious host of the biological control agent Trichogramma chilonis Ishii, Corcyra cephalonica (Stainton) egg was often sterilized by UV and then stored in low temperature to satisfy the mass production of T. chilonis. Effects of cold storage of C. cephalonica eggs on the quality of T. chilonis offspring were evaluated in the present paper by investigating the longevity, parasitization, survival rate, and life table parameters of T. chilonis offspring emerged from the sterilized C. cephalonica eggs stored at 4 °C for 15, 30, 45, and 60 days, respectively. Results showed that few T. chilonis adults emerged from the C. cephalonica eggs stored for 60 days. Compared with the fresh C. cephalonica eggs, the longevity of T. chilonis offspring (F1) females decreased, and the parasitization also exhibited a similar tendency but a slight increase in the treatment with cold storage of 30 days. The highest emergence rate and female rate were both occurred in the cold storage period of 15 days, and a decrease in 30 days and 45 days in comparison with control. The life table parameters including the net reproductive rate (R0), the intrinsic growth rate (rm) and the finite rate of increase (λ) also decreased, whereas the average generation time (Tc) and the population doubling time (T2) increased with the prolonging cold storage period to some extent. It could be concluded that the cold storage of C. cephalonica eggs affected the quality of T. chilonis offspring and the refrigerated C. cephalonica eggs at 4 °C especially exceeding 45 days should be cautiously utilized in the mass production of T. chilonis. |
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