共查询到20条相似文献,搜索用时 62 毫秒
2.
3.
用愈伤组织测定杨树对溃疡病的抗性 总被引:3,自引:0,他引:3
用溃疡病菌接种11个杨树品种和无性系,病菌在愈伤组织上的扩展速度、愈伤组织内过氧化物酶和多酚氧化酶的活性变化幅度与各相应树种的田间抗病性有明显的相关性,可以反映出不同树种对溃疡病的抗性。 相似文献
4.
5.
湖南杨树溃疡病研究初报 总被引:3,自引:0,他引:3
本文简介了溃疡病的名称和杨树溃疡病的分布及危害。此病在湖南是第一次发现。文章分别叙述了由两种病原引致的此病的病害症状,浅析了发病诱因,并对该病综合治理提出了初步建议。 相似文献
6.
杨树溃疡病潜伏侵染的研究 总被引:13,自引:0,他引:13
在陕西省杨树溃疡病(Dothiorella gregaria Sacc.)是一种严重的病害,分布普遍,危害130多个杨树品种、杂交种和无性系,其中有些树种如箭杆杨、北京杨、陕林2号杨、箭×钻杨等受害更为严重,常导致整株死亡,造成重大损失。据研究杨树溃疡病菌有潜伏侵染的特性,但在陕西省杨树苗木上未见其发病,有无潜伏侵染现象存在,更不清楚,为了弄清这一问题,我们于1987—1988年,对来自三个苗圃的24种杨树苗木 相似文献
7.
根据杨树溃疡病的发生规律,在测报期间内,病情指数(Dis)与相应时期的菌量(F_1、F_2、F_3)、积温(CT)、温湿比(TH)、温雨比(TR)及湿雨比(HR)有着密切的相关关系。应用多元统计方法建立的多元线性回归预测模型:Dis=19.0-2.8(F_3)~(1/2)+0.1F_1+0.0015(F_2)~3+4.15TH-0.042(CT)~(1/2)-0.4HR+3.5TR,可以预测一个月后的发病情况,模型经实际病情验证,有较高的准确性。 相似文献
8.
9.
10.
11.
ThefirstrePortabouttheprotectiveeffeetofless-aggrssivestrainswerethatSalamaninoculatedtheless-aggrssivcstrainsofI`tfnchingIobaccoontobaccoandIeaditob-tainpartresistance.ANerthen,thcexistofinducedresistancehavebeenrcPortonseveralkindsofplantssuchasPnIms,(*cstnut.Ma-hl.v.,1tcumis.lIlmus.lI'4'5'7.8.9.l().14.l5.16.I7.l8.1'J2lj.21=4.2s.2f'.=7.2x.3()IThei11ducedresistanceofplantsisassocl-atcdt`,iththeincrcaseofthelc17clofthepllellem*tl1eprocesscsofphellemaredcpcndonthcactivelevcloftheperoxidas… 相似文献
12.
13.
Xiang Cunti Sun Haifeng Li GuishengNortheast Forestry UniversityWu Xingyin Li Zhuo DangWenqiang Zhang Jinghua Zou XipinAcheng Forest Bureau of Heilongjiang Province 《林业研究》1991,2(1):48-55
The bacterial swollen stem canker of poplar is prevalent in planted poplars ofnortheast China.Serious damage occurs in the form of necrosis,putridity,cankers,swollen stemsand discolored wood of trunks and branches of young and mature trees.Tests of allergic reaction,pathogenicity,culture characteristic,Gram stain and anaerobic culture revealed that the pathogen isErwinia sp.Its occurrence depends mainly on the predisposing factors of the disease among whichthe susceptibility of poplars is the most important one.The disease becomes widespread in associa-tion with low-lying and high-humidity terrain,frost injury,node wounds,insect damage,and prun-ing and other mechanical wounds.Harmful factors promote the disease. 相似文献
14.
15.
苏北杨树新造林地溃疡病防治技术初探 总被引:1,自引:0,他引:1
采用多菌灵、咪鲜胺、十三吗啉、戊唑酮、百菌清等5种药剂对杨树新造林地溃疡病的病原菌——杜仲生拟茎点霉菌进行室内药效测定,结果咪鲜胺锰盐和多菌灵对病菌菌丝都有较好的抑制效果,同一种药剂对病原菌的抑制作用随供试药剂配比度增大而增强。在野外田间防治试验中,采用退菌特、咪鲜胺、福美双、多菌灵等4种药剂进行防治试验,结果表明,咪鲜胺、福美双、多菌灵对杜仲生拟茎点霉菌均有较好的防效,其防治效果分别为94.1%,94.1%,88.2%,退菌特防治效果较差,为58.8%。 相似文献
16.
Wu Xingyin Zhang JinghuaForest Pest Control Quarantine Station of Archeng City of Heilongjiang ProvinceXiang Cunti Li Guisheng '''' Shao Zhongwen Liu Xiaoguang Ma LiyaNortheast Forestry UniversityZhang Xianwen Li Zhuo Xie Guicai Dang WenqiangArcheng Forestry Bureau of Heilongjiang Province 《林业研究》1991,2(2):7-16
The poplar bacterial canker caused by Erwinia sp is a serious disease spreading inmost parts of Northeast China,where poplars are cultivalted.The disease seriously infects thosepoplars belonging to section Aigeiros or the intersection hybrids of section Tacamahaca and section Aigeiros and their clones.Five fine poplar cultivars resistant to the bacterial canker have been ob-tained by screening tests.They are Lz_2(Populus simonii×nigra var.italica),A_(15)(P.×sp.)613(P.×sp.),A_(102)and A_(98)(P.simonii×sp.)T following chemicals are obviously effective,such as:50%DT germicide ,40% XF-136 and 10% C.C.M.A.or 12.5% ramphencol and 50,000 ppm/mlvalidamycin,with which the stems or roots can be watered. 相似文献
17.
18.
19.