排序方式: 共有21条查询结果,搜索用时 171 毫秒
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烟粉虱是世界性重要害虫之一,严重影响温室蔬菜和花卉以及大田作物的产量。利用自制的LED-塑料杯诱杀器研究烟粉虱的趋光规律。研究结果表明,烟粉虱对三种灯的趋性差异极显著,烟粉虱对甲、乙两种灯趋性较大;三种距离之间差异极显著,15 cm和60 cm对粉虱有很好的诱集效果;黏杀剂之间差异极显著,且黏杀剂1比2的效果好。LED-塑料杯对烟粉虱的诱捕作用最大可达44.4%。 相似文献
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为了实现活虫捕捉,预测田间种群发生规律,了解田间种群抗性发生动态,通过韭菜迟眼蕈蚊在4科9种不同寄主上的产卵趋性和对6种不同颜色LED光趋性测定,获得最佳寄主与光源,结合韭菜迟眼蕈蚊采集笼制备与野外田间应用,成功获得活虫。韭菜迟眼蕈蚊在马铃薯上产卵量最大,为93.56粒,占产卵总量的45.27%,且对绿色光趋性最强,诱虫量达26.75只,占全部诱虫量的40.38%。在韭菜迟眼蕈纹采集笼的野外应用中,露地捕虫量为700~800只,温室100~200只,大棚300~400只。 相似文献
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研究结果表明,100W白炽灯较15W和40W的白炽灯对各种曲虫的诱集力为强。其灯下诱集量依次为:药材甲>谷盗类>黄斑露尾甲>蚕豆象>其他曲虫。还就白炽灯在曲虫防治上的应用进行了讨论 相似文献
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采用黑光灯诱集的方法,对秦岭火地塘林区主要趋光性昆虫种类及优势种的种群动态变化进行了研究,结果表明:该地区主要趋光性昆虫种类有76种,隶属于7个目,21个科,其中以鳞翅目种类最多,包括14科68种。主要优势种类包括石蛾、白蜡绢野螟、白线青尺蛾、橙黑纹野螟、蜉蝣、黄斑长翅卷蛾、黄灰呵尺蛾、黄修虎蛾、三线雪舟蛾、石蝇、雪尾尺蛾等共计11种。不同优势种的昼夜活动规律差异较大,但总体来看,均随时间呈现先增加后减少的变化趋势。该研究为主要昆虫的科学监测和及时防治提供了理论依据和指导。 相似文献
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光滑足距小蠹[Xylosandrus germanus(Blandford)]雌成虫具有明显的趋光性,光照强度为1~400 lx时,趋光性随光照强度提高而增强。25℃时,完全黑暗条件下该小蠹雌成虫不起飞,光照强度为1~1 500 lx时,起飞虫量随光照强度的增加而增加,且起飞虫量在光照强度为1 500 lx时达最大,光照强度超过1 500 lx时,起飞虫量又逐渐减少。在光照强度400 lx、温度21℃时雌成虫开始起飞,温度21~30℃,起飞虫量随温度升而增加,温度为25~27℃时起飞虫量较多,温度升至35℃时,小蠹雌成虫停止飞行。研究表明,光照和温度两个因素中,温度是光滑足距小蠹雌成虫起飞的先决条件,只有当环境温度高于起飞的临界温度(21℃)时,在低光照强度下雌成虫才起飞。 相似文献
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Jan Andersson 《Aquaculture International》1995,3(4):336-354
Two systems for enrichment and collection of natural Zooplankton in cooling water recipients were developed for rearing fish fry. One system filters-off plankton from the cooling water with rotating dip-nets (diam. 60 cm). The rotation is powered by the kinetic energy of the water and the nets are continuously flushed clean by high-pressure sprays. The water from the nets, being enriched with plankton, is pumped continuously to a grading station where undesirable size fractions are removed, after which the water is distributed to the rearing pens. The system has been tested at a nuclear power station in the south-western part of the Bothnian Sea and found to be promising, with a collection of, on average, 280 g day–1. The other system is based on attraction using underwater lamps and pumping of organisms into floating rearing pens. The system is automatic and powered by electricity from the grid. The technical performance has been good. The plankton has been size-graded by attaching net baskets around the lamps. At a nuclear power station on the western coast of the central Baltic Sea, the amount collected has, on average, been 45–570 g Zooplankton lamp–1 night–1. The collection system is considered to be of use in productive areas with moderate turnover of water. Both systems are in early stages of development and have not reached their full potential. Improvements are proposed and discussed. 相似文献
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蝗虫灾害物理防治发展及应用前景探讨 总被引:4,自引:0,他引:4
物理治蝗产生了针对蝗虫生理特性的无毒害化治理效果。负压气流吸入式灭蝗实现了对草原蝗虫无害化治理和蝗虫资源在家禽饲料方面的利用;针对蝗虫的群体性趋光行为,光电诱导捕集蝗虫技术已获取相关的发明专利,并逐步与机械化捕集治蝗技术相结合;微波、射线等辐射技术,利用高能电磁波谱对生物体的聚热致死效应,逐步应用于对蝗灾的防治。物理治蝗有利于生态环境保护和农产品品质安全,必将成为蝗灾治理的重要技术。 相似文献