共查询到20条相似文献，搜索用时 140 毫秒
1.
颜军 《中国进出境动植检》1998,(2)
执着的追求无私的奉献颜军当我站在那庄严、挺拔的办公楼前，看着那车、那花坛、那人行道时；当我置身于这多功能厅，看着那桌、那椅，感受那简洁而亮丽的氛围时，我的眼前总会出现一个人，一个身体敦实、衣着简朴、不善言词，却对事业无比执着、为集体无私奉献的人。他，... 相似文献
2.
龙眼树的病毒病害的初步研究 总被引：2，自引：0，他引：2
龙眼(Euphoria longana)是无患子科四种重要果树之一,原产我国。我国东南诸省是地球上主要产区。龙眼树的经济价值很高。 相似文献
3.
一、蚕豆染色病毒的发现与鉴定今年3月下句,柯本博士再次来宁进行协作研究。我们先后到中国蚕豆的主要产区——四川、湖北和江苏南通地区进行实地考察,在四川省农科院作物所,湖北省农科院现代化所和江苏启东县农科所的蚕豆试验田中,都看到了一种国内从未发现过,但在欧 相似文献
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5.
无数育花专家长期以来一直竭尽全力研究浅蓝色玫瑰的秘密,但培育这种浅蓝颜色花朵的试验一直没有成功,因为玫瑰花缺少相应的色素基因。而借助于生物领域中的其他研究,这一难题正在逐步被解决。 相似文献
6.
检疫起源于欧洲的地中海国家。Ouarantine(检疫)一词的本意是“四十天”,来源于意大利语的quarantina(四十天)和quaranta(四十)两词。这对所有的植检同行来说,也许是多余的话。因为不管是一名专职的检疫工作者,还是与 相似文献
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8.
采自哈纳斯的新疆新记录的地衣 总被引：8，自引：1，他引：8
报道了１９９６年７月在哈纳斯自然保护区及其附近所采到的新疆新记录地衣１２种，其中１种１属为地知地衣，另１１种隶属于１１个属，６科。 相似文献
9.
1987年自东北农学院马铃薯区域试验材料(东农85-3334)上分离到烟草坏死病毒(Tobacco Necro-sis Virus简称TNV)。 相似文献
10.
可持续的植物保护与农药的发展 总被引：7，自引：0，他引：7
可持续的植物保护与农药的发展丁伟（西南农业大学植保系重庆北碚４００７１６）进入９０年代,面对２１世纪,人类却面临环境和资源问题的严重挑战。越来越多的国家的人民已经认识到了传统发展战略的局限性,接受了可持续发展的思想。环境问题的一个重要方面是的植物保护... 相似文献
11.
BHT对苹果采后灰霉病的防效及防御酶活性和丙二醛含量的影响 总被引：1，自引：1，他引：0
为探究2,6-二叔丁基-4-甲基苯酚(2,6-di-tert-butyl-4-methylphenol,BHT)对苹果采后灰霉病的防效和防病机制,采用平板法和刺伤接种法测定了BHT对灰霉病菌Botrytis cinerea的抑制作用及果实内防御酶活性和丙二醛含量的影响。结果表明,0.1 mmol/L BHT对苹果灰霉病的防效最佳,处理苹果后间隔48～96 h接种灰霉病菌,其防效可达68.59%～73.55%,其次为0.2、1.0 mmol/L BHT处理,但防效均低于52.94%。0.1 mmol/L BHT处理对灰霉病菌菌丝生长和分生孢子萌发无显著抑制作用,但可显著增强果实内超氧化物歧化酶、过氧化物酶和过氧化氢酶的活性以及总抗氧化能力,其峰值是对照的1.82～5.28倍,且均显著高于单独接种灰霉病菌的处理。此外,单独接种灰霉病菌的苹果果实内丙二醛含量快速升高,最大增幅达251.49%,而BHT处理后丙二醛含量变幅较小,最大增幅仅为83.95%。表明BHT可通过增强苹果果实内防御酶活性水平和总抗氧化能力来降低丙二醛的积累,从而提高果实对灰霉病的抗性。 相似文献
12.
为明确不同梨和苹果种质对阿太菌果腐病菌Athelia bombacina的抗性以及筛选防治其有效杀菌剂,采用离体菌丝块有伤接种方法对40份梨种质和154份苹果种质进行病斑直径测定,通过聚类分析法和平均病斑直径法对不同种质进行了抗病性分级,并利用菌丝生长速率法测定了13种常用杀菌剂对阿太菌果腐病菌的毒力。结果表明,根据聚类分析法和平均病斑直径法均可将梨和苹果种质划分为高抗、抗、中抗、感和高感5类。与平均病斑直径法相比,梨和苹果种质分别以欧式距离为14和10作为最佳聚类分割点时进行聚类分析能够更加科学地划分类别,从40份梨种质中筛选出金锤子梨1个高抗种质,仅占总数的2.50%,从154份苹果种质中筛选出垂丝海棠、莫斯科透明、新疆苹果、路边石、伏帅等32个高抗种质,占总数的22.73%。药剂试验结果表明,戊唑醇、腈菌唑、咯菌腈和噻呋酰胺对阿太菌果腐病菌菌丝生长的抑制效果较好,抑制中浓度EC_(50)分别为0.027、0.048、0.054和0.095 mg/L。表明梨和苹果种质均可被阿太菌果腐病菌侵染,但不同种质间抗病性差异明显,戊唑醇是采前防治阿太菌果腐病菌菌丝生长的最佳药剂。 相似文献
13.
Ascospores of Mycosphaerella pomi, the pathogen of Brooks fruit spot of apple, were produced in pseudothecia on previously infected and overwintered apple leaves from late April through early August in Aomori Prefecture, Japan. In June 2003, the ascospores were germinating and producing Cylindrosporium-type conidia on apple fruit and leaf surfaces in an orchard. After ascospores were sprayed on apple leaves, Cylindrosporium-type conidia developed on the leaf surfaces. Such Cylindrosporium-type conidia caused typical symptoms of Brooks fruit spot on apple trees after inoculations. These results suggested that the Cylindrosporium-type conidia also serve as an infection source, in addition to the ascospores, for Brooks fruit spot in apple orchards. 相似文献
15.
Takanori Tsukamoto Koji Azegami Takayuki Matsuura Tatsuji Ohara Yasuhiro Inoue Akifumi Mizuno Kouji Yoshida Hideo Bessho Shigeru Kimura Masao Goto 《Journal of General Plant Pathology》2005,71(4):296-301
The infection frequency of mature apple fruit by Erwinia amylovora and the survival of E. amylovora in the fruit stored at low temperature were investigated. The fruit stems (pedicels) of 460 mature apple fruit were inoculated with 105 or 104 cfu of bioluminescent E. amylovora, tagged with lux genes. Nine days after inoculation, 43% and 27% of the fruit inoculated with 105 and 104 cfu, respectively, were infected. All infected fruit looked healthy. After 6 months of storage at 5°C, almost all of the 142 infected fruit had viable E. amylovora. Of the fruit containing E. amylovora internally, 19.5% had latent infections and the rest had blight symptoms. E. amylovora was not uniformly distributed in the fruit flesh, and internal brown lesions were observed where E. amylovora was densely distributed. These findings showed that mature apple fruit may be infected with E. amylovora, especially as latent infections, and act as a source for long-range dissemination. 相似文献
17.
Yashika Walia Yogesh Kumar Tanuja Rana Pooja Bhardwaj Raja Ram Pritam Das Thakur Usha Sharma Vipin Hallan A. A. Zaidi 《Journal of General Plant Pathology》2009,75(4):307-311
Apple scar skin viroid (ASSVd) infection is a major limitation to apple fruit quality and causes huge economic losses. In surveys of apple orchards
in the northern Indian state of Himachal Pradesh, fruits with dappling symptoms were noticed. ASSVd was detected from these
fruits and molecularly characterized. Ten clones from three isolates were sequenced, of which seven were new sequence variants
of ASSVd. The clones had significant sequence variability (94–100%) with each other. Variability was more common in the pathogenic
domain of the viroid genome. Four of the clones were 330 nucleotides (nt) long, and the other six had an additional nucleotide.
Phylogenetic analysis showed close affinity of the present isolates with some Chinese and Korean isolates. The study reports
seven new variants of ASSVd and also provides the first molecular evidence of viroid infection (ASSVd) in apple in India. 相似文献
19.
P.R. Gildemacher B. Heijne J. Houbraken T. Vromans E.S. Hoekstra T. Boekhout 《European journal of plant pathology / European Foundation for Plant Pathology》2004,110(9):929-937
In 1999 and 2000, the effects of scab fungicides on yeast composition and russeting of Elstar apples were assessed. Yeast composition of fungicide-treated and untreated young apple fruit with or without russet symptoms was investigated and enzyme activity of the yeasts was studied. Cryptococcus albidus, C.laurentii,Rhodotorula glutinis, Sporobolomyces roseus andMetschnikowia pulcherrima dominated the apple fruit surface. Russeted apple fruitlets had a higher red yeast density than non-russeted fruitlets. Invitro fungicide susceptibility of the dominant yeast species varied. Dithianon and dodine were active against all tested species, captan and tolylfluanid showed specificity for certain species, whereas pyrimethanil and bupirimate were largely ineffective. Fungicide treatment in the field had a clear effect on the yeast composition. Metschnikowia etschnikowia pulcherrima was eliminated from the phyllosphere and cryptococco$ï species diminished by both captan and dithianon. The red yeast population was not significantly changed by either fungicide. Captan, dithianon, tolylfluanid and pyrimethanil reduced russet in the field in both years, dodine and kresoxim-methyl only in 2000. All yeast species had cutinolytic activity, all but M.pulcherrimaand Debaryomyces hansenii were lipolytic, and some of the isolates showed proteolytic activity. 相似文献
20.
Koji Azegami Takanori Tsukamoto Takayuki Matsuura Yasuhiro Inoue Hiroshi Uematsu Tatsuji Ohara Akifumi Mizuno Kouji Yoshida Hideo Bessho Shigeyoshi Sato Shigeru Kimura Masao Goto 《Journal of General Plant Pathology》2006,72(1):43-45
Invasion of apple fruit by Erwinia amylovora from fruit-bearing twigs through the abscission layer at fruit maturation was examined. Erwinia amylovora (ca. 105 cfu) tagged with bioluminescence genes from Vibrio fischeri was deposited in artificial wounds on fruit-bearing twigs of apple trees grown in a containment greenhouse on September 22,
27, or October 5, 2004. On October 22, 176 apples were harvested and cut horizontally in half. The upper halves were stamped
on plates of selective medium, and the lower halves were flooded with iodine solution to assess maturity. All fruit were symptomless
and fully mature. The pathogen was recovered from 19 (10.8%) apples. The result showed that if at least ca. 105 cfu of E. amylovora are present in fruit-bearing twigs at the time of fruit maturation, the bacteria can pass through the abscission layer into
the fruit, even though the mature fruit lack symptoms. 相似文献