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针对松纵坑切梢小蠹在云南历年发生危害的情况及主要危害特点,分析了发生危害的原因并提出了相应的防治建议. 相似文献
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蚧虫是危害园林植物的主要害虫之一。植株若发生此类危害将直接影响其正常生长发育、开花结果,危害重者,导致植株枯死。本文主要介绍了蚧虫的发生危害特点及综合防治的主要措施。 相似文献
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翼城县核桃黑小吉丁虫综合防治技术初探 总被引：1，自引：0，他引：1
《山西林业》2014,(4)
阐述了核桃黑小吉丁虫的形态特征和生物学特性,从危害情况、危害症状和虫害发生与林分因子关系方面介绍了该虫在翼城县发生及危害情况,提出了综合防治意见与建议,以期控制该虫危害。 相似文献
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库尔勒香梨食心虫类的危害及综合防治技术 总被引：1，自引：0，他引：1
简介了危害库尔勒香梨害虫的危害特点,发生规律及其综合防治技术。危害库尔勒香梨的食心虫类主要有梨小食心虫、香梨优斑螟和苹果蠹蛾。近年来梨小食心虫的危害呈上升趋势,香梨优斑螟的危害也尚未得到有效控制,苹果蠹蛾作为检疫对象,常年防治基本得到控制,但仍有零星发生。为了提高库尔勒香梨优质果品的产量和品质,通过分析这些害虫对库尔勒香梨的危害及发生规律,结合香梨生产过程,提出了综合防治措施。 相似文献
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核桃黑小吉丁虫综合防治技术初探 总被引：1，自引：0，他引：1
阐述了核桃黑小吉丁虫的形态特征和生物学特性，从危害情况、危害症状和虫害发生与林分因子关系方面介绍了该虫在翼城县发生及危害情况，提出了综合防治意见与建议，以期控制该虫危害。 相似文献
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本文记述了中国松叶蜂昆虫两新种,马尾松吉松叶蜂和油松吉松叶蜂。文中附有形态特征图4幅。 相似文献
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东北主要绿化树种对大气重金属污染物吸收能力的研究 总被引：3，自引：0，他引：3
本文于2003年9月到10月在哈尔滨市主要街道采集和分析主要绿化树种的树叶，研究测定了东北主要的24种乔木树种和6种灌木树种对大气重金属污染物铅、镉、铬、汞的吸收能力。结果表明：绿化树种对铅、镉、铬、汞具有一定的吸收能力，并依污染物和树种的不同而有明显差异；根据不同树种对不同大气重金属污染物吸收量的差异将其各分为三级，其中吸铅量高的树种有白桦、垂枝榆和京桃等；吸镉量高的树种有小黑杨、钻天杨、银中杨和旱柳等；吸铬量高的树种有黄菠萝、紫丁香、旱柳、黑皮油松、红皮云杉、京桃、榆叶梅和糖槭等；吸汞量高的树种有榆叶梅、蒙古栎、旱柳、接骨木、野梨和华北绣线菊等。本研究为在不同大气重金属污染条件下选择不同绿化树种提供了科学依据。表4参11。 相似文献
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Mohammad Musharof Hossain 《Fitoterapia》2011,82(2):102-140
Orchids have been used as a source of medicine for millennia to treat different diseases and ailments including tuberculosis, paralysis, stomach disorders, chest pain, arthritis, syphilis, jaundice, cholera, acidity, eczema, tumour, piles, boils, inflammations, menstrual disorder, spermatorrhea, leucoderma, diahorrhea, muscular pain, blood dysentery, hepatitis, dyspepsia, bone fractures, rheumatism, asthma, malaria, earache, sexually transmitted diseases, wounds and sores. Besides, many orchidaceous preparations are used as emetic, purgative, aphrodisiac, vermifuge, bronchodilator, sex stimulator, contraceptive, cooling agent and remedies in scorpion sting and snake bite. Some of the preparations are supposed to have miraculous curative properties but rare scientific demonstration available which is a primary requirement for clinical implementations. Incredible diversity, high alkaloids and glycosides content, research on orchids is full of potential. Meanwhile, some novel compounds and drugs, both in phytochemical and pharmacological point of view have been reported from orchids. Linking of the indigenous knowledge to the modern research activities will help to discover new drugs much more effective than contemporary synthetic medicines. The present study reviews the traditional therapeutic uses of orchids with its recent advances in pharmacological investigations that would be a useful reference for plant drug researches, especially in orchids. 相似文献
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本文对2006-2013年期间我国感病桉树或桉树木片上发现的21个真菌物种的分类地位、形态特征、菌落特点、寄主范围、分布地域和危害特点等进行了概述。介绍的对象包括桉树枝干斑点溃疡病原 Teratosphaeria zuluensis（祖鲁畸腔菌）;桉树叶部斑点溃疡病原Teratosphaeria destructans（破畸腔菌）,Mycosphaerella marksii（马克氏球腔菌）,M. crystallina（水晶球腔菌）,M. yunnanensis（云南球腔菌）;桉树顶梢及叶白枯萎病原 Quambalaria pitereka（彼特氏桉座孢）;桉树苗茎腐病原 Calonectria cerciana（桉树丽赤壳）,C. pauciramosa（常丽赤壳）,C. pseudoreteaudii（瑞丽赤壳）;桉树叶焦枯病原 C. crousiana（克儒斯氏丽赤壳）,C. fujianensis（福建丽赤壳）,C. pauciramosa（常丽赤壳）, C. pseudocolhounii（类柯氏丽赤壳）,C. pseudoreteaudii（瑞丽赤壳）;桉树木片腐烂病原Ophiostoma tsotsi（类栎长喙壳菌）;桉树枝干溃疡病原Chrysoporthe deuterocubensis（类古巴黄隐丛赤壳）,Fusicoccum fabicercianum（法比桉树壳梭孢）,Lasiodiplodia theobromae（柯柯豆毛色二孢）,L. pseudotheobromae（类柯柯豆毛色二孢）,Celoporthe guangdongensis（广东暗隐丛赤壳）,C. eucalypti（桉树暗隐丛赤壳）;桉树枝干枯萎病原Ceratocystis acaciivora（相思长喙壳）,C. chinaeucensis（中国桉树长喙壳）。 相似文献
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泡桐叶片蛋白质多态性及其聚类分析(英文) 总被引：2，自引：0，他引：2
根据白花泡桐（Paulownia fargesii）、白花兰考泡桐（P.elongata f. alba）、毛泡 桐（P. tomentosa）、川泡桐（P. fargesii）、山明泡桐（P. lamprophylla）、成都泡桐 (P. albiphloea var chengtuensis)、鄂川泡桐（P. albiphloea）、南方泡桐（P. austra lis）、白花泡桐（P. fortunei）、兰考泡桐（P. elongata）叶片蛋白质单向电泳和双向 电泳结果，可将它们聚类分为白花泡桐组（白花泡桐和白花兰考泡桐）、南方泡桐组（南方 泡桐和成都泡桐）和毛泡桐组（毛泡桐、川泡桐、鄂川泡桐、山明泡桐和兰考泡桐）。该结 果为泡桐属植物的分类提供了参考依据，也为泡桐属植物种确立、杂种鉴定和新品种培育奠 定了基础。 相似文献
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中国葛藤叶蝉名录及新种、新记录描述（同翅目：叶蝉科） 总被引：3，自引：0，他引：3
本文系统报道我国葛藤上的叶蝉种类，共有11亚科40属50种，其中含3新种、1中国新记录属、5中国新记录种，建立1新组合种，并对折板叶蝉属Paradaevicephalus Ishilhara的属征进行了厘订。新种模式标本保存在安徽农业大学昆虫标本室。 相似文献
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Katsumi Togashi Kaori Aida Katsunori Nakamura Takao Horikoshi Fumiki Takahashi 《Journal of Forest Research》1997,2(1):39-43
To evaluate the effect of adjacent tree species on the susceptibility of Japanese black pine (Pinus thunbergii) to pine wilt disease, an inoculation experiment was conducted usingP. thunbergii seedlings potted with seedlings of six tree species,i. e. Alnus sieboldiana, Eurya japonica, Lespedeza bicolor formacutifolia, Pinus thumbergii, Robinia pseudo-acacia andSarothamus scoparius. About ten months after planting, they were inoculated with the pinewood nematode (Bursaphelenchus xylophilus) in early July 1992. After that, the proportion of pine seedlings with completely discolored foliage increased more quickly
when the seedlings were potted withR. pseudo-acacia, S. scoparius orA. sieboldiana than when potted withP. thunbergii, L. bicolor orE. japonica. At the end of the study period, 17 weeks after inoculation, it reached 90.6%, 90.0%, 87.5%, 72.7%, 63.3%, and 59.4% when
the pine seedlings were potted withR. pseudo-acacia, S. scoparius, A. sieboldiana, P. thunbergii, L. bicolor andE. japonica, respectively. This indicated that the susceptibility ofP. thunbergii seedlings to pine wilt disease was influence by the species of adjacent trees. 相似文献
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木麻黄科有4个属96个种,天然分布于澳大利亚、东南亚和太平洋群岛,垂直分布于海平面潮线开始至海拔3000m以上的高山。目前,我国引种木麻黄已有：107a的历史,但加世纪80年代中期,我国才开始系统地从事木麻黄种质资源引种工作,开展了木麻黄种质资源收集、保存,优良种源、家系筛选,无性繁殖、共生菌等研究。到目前为止,在我国海南、广东、福建、浙江和广西等省区,引进了2个属(Gasuarina,Allocasuarina)、23个木麻黄种、200多个种源和260多个家系,通过试验筛选出了一些适合不同立地的优良树种、种源或家系,其中短枝木麻黄和山地木麻黄为全分布区种源。加世纪90年代以来,对异木麻黄属树种,进行了重点引进,共引进了10余种异木麻黄属植物,增加了我国木麻黄遗传资源,并对主要木麻黄种质资源进行了保存和利用。引进的木麻黄树种包括田野木麻黄、迪尔斯木麻黄、双针木麻黄、费雷泽木麻黄、休格尔木麻黄、矮木麻黄、滨海木麻黄、利曼氏木麻黄、纳纳木麻黄、沼泽木麻黄、小松木麻黄、多纹木麻黄、森林木麻黄、轮生木麻黄、山神木麻黄、鸡冠木麻黄、细枝木麻黄、短枝木麻黄、粗枝木麻黄、大木麻黄、山地木麻黄、肥木木麻黄、小齿木麻黄。论文着重介绍了我国木麻黄种质资源的引种驯化历史、研究、保存现状等。 相似文献
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1985－1987年在猛禽迁徒中途主要停歇地的山东省青岛市浮山、长岛县大黑山岛和辽宁省大连市老铁山，利用环志、染色标记和观察等方法，对其主要种类迁徒规律的生物学特性进行了研究，结果表明：猛禽南迁途径环志研究区的时间为8月下旬至12月中旬。迁徒高峰在9月中旬至10月底，通过环志鸟回收分析表明，猛禽的越冬区域为长江中下游及期 以南地带，并延伸到东南沿海。首次揭示了东北松嫩平原为途径经老铁山地区部分苍鹰的繁殖区域。秋季途径老铁山地区，飞越渤海海峡向南迁飞的部分松雀鹰，春归线则可能沿渤海海湾内侧几东北繁殖区迁飞。 相似文献
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Five Aigeiros section poplar clones were adopted as parents to produce five full-sib families through cross-breeding. Morphological,
ecophysiological, and growth characteristics of the five parents and their 15 superior F1 generations were investigated during
45 days of flooding followed by a 10-day recovery period. Cuttings were subjected to two treatments: watered (control) and
flooded to 10 cm above the soil surface. Results showed that flooded cuttings showed significant reduction in growth of height,
root-collar diameter and leaf area, and root and total biomass yield. All 20 clones formed hypertrophied lenticels and adventitious
roots by day 6–14 of flooding. In flooded cuttings, net photosynthesis, stomatal conductance, transpiration, and chlorophyll
fluorescence were decreased significantly compared with the control. After flooding ended, all plants recovered rapidly. Generally,
progenies showed higher growth of height, root-collar diameter, root biomass and leaf area than their parents both under flooding
and control conditions, showing that heterosis existed in F1 generations, regardless of flooding. However heterosis was lower
under flooding conditions than in the control. Under flooding, the highest heterosis of higher-parent in height and root-collar
diameter were 68.63 and 20.83%, respectively. Variability of flood tolerance among progenies was clear in growth of height
and root-collar diameter. Selection criteria for parents in cross-breeding were different between control and flooding. Relative
effect values of the specific combining ability (SCA) and relative effect values of the general combining ability (GCA) of
parents were more important than their flood tolerance. Progenies with a higher level of flood tolerance could be obtained,
even from parents intolerant to flooding. In terms of breeding, height growth would be most important characteristic to measure
in flooding conditions, and root-collar diameter growth was also very useful. Based on all measured values, the tested 20
clones were classified into three groups using hierarchical cluster analysis. Clones Lu, E4, E9, E29, A2, A8, A9, B1, B3,
B4, and D8, were flood-tolerant. Clones Lf, Ha, Lm, D1, D7, F9, and F21 were moderately flood-tolerant. Clones Sm and F13
were flood-susceptible. 相似文献