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不同光强LED黄光对灰茶尺蠖 发育和繁殖的影响
Effects of yellow LED light of different intensity on the development and reproduction of Ectropis grisescens Warren
乔 利;张苗苗;巩中军;耿书宝;洪 枫; 尹 健;武予清
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DOI:10.7679/j.issn.2095-1353.2022.081
作者单位:信阳农林学院,信阳 464000;河南省农业科学院植物保护研究所
中文关键词:黄色光谱;不同光强度;灰茶尺蠖;发育;繁殖
英文关键词:yellow spectrum; different light intensities; Ectropis grisescens Warren; development and reproduction
中文摘要:
【目的】 为探索LED黄光不同光照强度对灰茶尺蠖Ectropis grisescens Warren种群发展的影响,为茶园防蛾灯的应用提供理论依据。【方法】 以室内鲜叶饲养的灰茶尺蠖第5代1龄幼虫为材料,设置黄光组6个处理和对照组1个处理,每个处理80头幼虫。具体处理方法为:白天(7:00-19:00)均用普通日光灯(150-200 lx)持续照射12 h,夜间(19:00-7:00)黄光(波长为590-600 nm,光照强度分别为17、27、37、40、80和120 lx)持续照射12 h。对照组持续黑暗12 h。研究不同光照强度对灰茶尺蠖幼虫发育历期、存活率、蛹重、成虫羽化率、产卵前期、产卵历期、产卵量、寿命及卵孵化率的影响。【结果】 与对照组相比,120 lx黄光处理下幼虫发育历期延长至13.28 d,存活率降低至1%。4龄和5龄幼虫延迟进入蛹期。不同处理组显著影响成虫的羽化率、产卵量及产卵历期,其中120 lx强度照射后对灰茶尺蠖成虫影响最大,与对照组相比,成虫羽化率和产卵量分别下降50%和34.68%,产卵历期缩短了3.14 d。不同处理组灰茶尺蠖卵孵化率均大幅度降低,其中,经40、80和120 lx强度黄光照射后,卵孵化率分别下降了83.77%、82.00%和86.89%。【结论】 通过光照强度为40、80和120 lx的黄光处理后,显著缩短了灰茶尺蠖成虫的寿命,降低了羽化率,抑制灰茶尺蠖的产卵量及孵化率,从而抑制灰茶尺蠖种群的发展速度,为茶园灰尺蠖绿色防控提供了技术支撑。
英文摘要:
[Objectives]  To compare the effect of different intensities of yellow LED light on the development of Ectropis grisescens Warren, and thereby provide a theoretical basis for the environmentally-friendly prevention and control of this pest. [Methods]  Fifth generation first instar larvae were reared on fresh leaves and randomly assigned to one of 5 yellow-light treatment groups plus a control group, with 80 larvae in each group. During the day (7:00-19:00) all treatment groups were subject to 12 h illumination from an ordinary fluorescent lamp (150-200 lx). During the night (19:00-7:00) the five treatment groups were exposed to different intensities (17, 27, 37, 40, 80 and 120 lx) of yellow light (590-600 nm) for 12 h, while the control group was kept in darkness over the same period. The larval period duration, survival rate, pupal weight, adult emergence rate, pre-oviposition period, duration of oviposition, female fecundity, adult longevity and hatching rate, of each group, were measured and compared. [Results]  The larval period and survival rate of the 120 lx treatment group were significantly longer (13.28 d) than those of the control group, the survival rate significantly lower (1%), and fourth and fifth instar larvae pupated later. The intensity of yellow light significantly affected the eclosion rate, female fecundity and duration of oviposition; these parameters were 50%, 34.68% and 3.14 d lower, respectively, in the 120 lx treatment group than in the control group. The hatching rate in all treatment groups was lower than in the control group; 83.77%, 82% and 86.89% lower, respectively in the 40, 80 and 120 lx treatment groups. [Conclusion]  Exposure to 40, 80 and 120 lx yellow LED light significantly reduced the adult longevity, emergence rate, female fecundity and hatching rate of E. grisescens, and prolonged larval development. These results suggest that yellow LED lights could be an environmentally-friendly way of controlling E. grisescens in tea plantations.
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