搜索结果: 76-90 共查到“知识库 森林病理学”相关记录99条 . 查询时间(2.25 秒)
森林衰退病(Forest decline)是由若干可交替的并特别有顺序的非生物和生物因子的相互作用而引起,并呈现渐进的全体的退化,最终导致林木死亡的一类病害。衰退症状包括生长速度慢,叶稀疏、小型及歪曲,经常有缺绿现象,叶缘变褐色,叶片过早变黄,过早脱落,直至死亡。衰退病的起因有非生物因素和生物因素。研究中存在着将各因素过分简单化的现象。森林衰退研究的主要方向是找出主导因素及各因素之间的相互关系。
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朱砂根枯萎病的发生特点与防治技术
朱砂根 枯萎病 症状 综合防治
2009/3/11
朱砂根近几年作为观果花卉连年设施栽培，导致枯萎病发生日益严重。经作者多年试验探讨，总结了朱砂根枯萎病发生的症状、病原菌、病害发生规律及其影响因素，并提出相应的综合防治措施。这是我国南方对朱砂根枯萎病的首次报道。
Variability in antagonistic activity and root colonizing behaviour of Trichoderma Isolates
Antagonistic activity Cicer arietinum Root exudates Rhizosphere Non-rhizosphere colonization
2009/2/19
Antagonistic activity and root colonizing behaviour of 10 Trichoderma isolates collected from different agro-ecological zone of West Bengal were evaluated. Of these, T. viride from Bishnupur (red and ...
Armillaria Root Disease Stand Establishment Decision Aid
Armillaria Root Disease Establishment Decision Aid
2009/2/11
In the Southern Interior of British Columbia, Armillaria (Armillaria ostoyae) root disease (DRA) causes considerable losses in immature stands by killing natural and planted coniferous trees. Tree mor...
Characterizing the effects of dwarf mistletoe and other diseases for sustainable forest management
Arceuthobium tsugense forest tree disease impacts disease forecast models
2009/2/11
Many insects, fungi, and plants in forest ecosystems can damage trees and forests, depending on stand and environmental conditions. Natural disturbances, harvesting, and other forest practices can ret...
An initial look at mycorrhizal fungi and inoculum potential in high elevation forests
mycorrhizal fungi inoculum potential high elevation forests
2009/2/11
Mycorrhizae are symbiotic associations that improve plant nutrition in the competitive biological communities that inhabit forest soils. The goal of this research was to determine if cutblock size and...
Laminated Root Rot Forest Health Stand Establishment Decision Aid
forest health forest management laminated root rot Phellinus weirii root disease management
2009/2/5
Laminated root rot (Phellinus weirii) is the most prominent root disease of Douglas-fir in coastal coniferous forests and is endemic throughout its host’s range in British Columbia. The disease spread...
The Xylotroph's Macromycetes on Beech in Azerbaijani Forests
Xylotroph Macromycetes Beech Basidiomycotina Azerbaijan
2009/1/14
The aim of this study is to investigate the species composition and significance of beech-wood decomposing macromycetes. A total of 101 species of macromycetes were found on beech (Fagus orientalis L...
Two-year field performance of lodgepole pine seedlings：Effects of container type, mycorrhizal fungal inoculants, and site preparation
container type Copperblock™ AirBlock™ Styroblock™ ectomycorrhizae inoculation lodgepole
2009/1/8
Interior lodgepole pine (Pinus contorta var. latifolia) seedlings were grown in Styroblocks™, Copperblocks™,
or AirBlocks™, and inoculated with Rhizopogon rubescens or Hebeloma long...
Beneficial Effects of Fungal Treatment before Pulping and Bleaching of Acacia mangium and Eucalyptus camaldulensis
Fungi biopulping biobleaching acacia eucalyptus inoculation
2009/1/8
Three white-rot fungi (Ceriporiopsis subvermispora (Pilát) Gilb. & Ryvarden, Phanerochate chrysosporium Burds, and Trametes (Coriolus) versicolor (L.) Lloyd) were tested for their ability to modify/de...
通过对欧美杨喷施黄腐酸后的几项生理指标的研究，结果表明，质量浓度为3.5 g•L-1的处理效果最好，其气孔导度和蒸腾速率分别比对照降低了42.0%和26.1%；对光合作用有促进作用；对欧美杨的叶水势提高幅度为13.8%，能显著抑制叶水势的下降。
河南省新发杨树黄叶病害的发生特性研究
杨树 黄叶病害 特性
2009/1/6
对河南省2005年以来新发生杨树黄叶病害的特性进行了研究。结果证明，2008年病害危害继续扩大，新发病地块出现50处，但老的发生区没有大面积扩散，枯死数量所占前年总病树的百分比从2007年的1%下降到了0.6%。黄叶病杨树存在侧芽萌发及顶芽小叶现象，但不属于植物病理学上的丛枝。病害在春秋两季发病明显，实验证明病害与越冬关系不大，7月份有隐症现象，该隐症为高温隐症。加强水肥管理及间伐对缓解症状有一定...
晚秋桑树健株与黄化型萎缩病株的同功酶
黄化型萎缩病株 桑树健株
2008/11/19
对处于休眠期的八个品种桑树韧皮部的过氧化酶和酯酶同功酶作了分析,未发现抗病性与同功酶之间有相关性。但是,实验结果指出,“湖桑32号”健株与黄化型萎缩病株的酯酶同功酶有差异,这对诊断和检疫可能有意义。