犬脱毛综合征症状鉴别诊断     

魏东  张乃生 《中国畜牧兽医》2007,34(2):122-125

临床中常有犬脱毛的现象，引起脱毛症的疾病很多，常发的有遗传病、寄生虫病、真菌性皮肤病、内分泌疾病和营养代谢病，作者综述了各类疾病的临床症状特征，提供了犬脱毛症鉴别诊断的思路和方法，为该病的治疗提供了理论和实践依据。  相似文献   

新疆甜菜坏死黄脉病毒分离物的症状反应及核酸组分分析     

刘升学  黄家风  向本春  万利君  席德慧 《中国糖料》2002,(3):12-16

利用症状反应和RT-PCR技术对12个采自新疆不同地区的甜菜坏死黄脉病毒(BNYVV)分离物进行比较研究,结果表明:12个BNYVV分离物在甜菜、番杏和昆诺阿藜上的症状反应无明显区别,均以黄斑为主;利用RT-PCR进行的核酸组分分析却有一定差异,不同地区的BNYVV分离物含有不同的RNA组分,塔城地区、奇台地区及石河子145团的BNYVV分离物核酸组分为RNA1、RNA2、RNA3和RNA4;库尔勒地区的BNYVV分离物核酸组分还含有RNA5;石河子有些地区的BNYVV分离物核酸组分只有RNA1和RNA2。  相似文献   

新疆甜菜花叶病发生和病原病毒的研究     

向本春  席德慧  刘升学  曾幼玲  谢浩 《西北农业学报》2000,9(1):49-53

1995-1998年对新疆甜菜主产区甜菜花叶病的发生进行了调查。采集花叶标样191个,并对毒原种类做了分离鉴定,结果表明,甜菜花叶病有4种症状类型,且有不同的地区分布,又由不同的病毒侵染所致,这些病毒是甜菜花叶病毒（BMV）,黄瓜花叶病毒（CMV）和真菌传杆状病毒属（Furoviuses)分离物,CMV自然感染甜菜在国内尚属首次报道。  相似文献   

Diversity of boron-toxicity tolerance in lentil growth and yield   总被引：1，自引：0，他引：1  

Sui-Kwong Yau  William Erskine 《Genetic Resources and Crop Evolution》2000,47(1):55-62

Boron (B) toxicity is increasingly being recognized as a problem in arid areas of West Asia, where lentil is widely grown. This study investigated whether or not: (1) phenotypic variation of B-toxicity tolerance exists at the seedling stage in lentil, (2) such variation persists to affect adult performance, and (3) there is geographical diversity in seedling tolerance. Four experiments were conducted in a greenhouse. Boric acid was added and mixed uniformly into the soil-mix to prepare high-B soil. Experiment I screened 77 lentil lines randomly selected from ICARDA's international nurseries. Visual growth scores and foliar B-toxicity symptom scores were taken 4–5 weeks after sowing, and used as an indicator for B-toxicity tolerance. In Experiments II and III, four selected lines were studied beyond the seedling stage. In Experiment IV, 231 lentil accessions from seven different countries/regions of the world were screened. There were highly significant differences between the 77 lines in B-toxicity tolerance at the seedling stage as indicated by their degree of B-toxicity symptom, and plant growth. The two tolerant and two sensitive selections from Experiment I showed diverse performance up to maturity as reflected by their differences in leaflet loss, dry mass reduction, and seed yield when grown in high-B soil. There were significant differences in B-toxicity tolerance between the 231 accessions. On average, accessions from Afghanistan were the most tolerant, followed by those from India, Iraq, Syria, Europe, Ethiopia, and Nepal.  相似文献   

胆碱缺乏对家禽健康和生长的影响及其机理     

闻治国  唐静  谢明  黄苇  侯水生 《动物营养学报》2014,26(9)

胆碱是家禽保持健康、生长发育必需的营养素,它在细胞膜磷脂合成、甲基组代谢、神经递质传递和肝脏脂质转运等方面发挥重要作用.饲粮中胆碱缺乏导致家禽生长发育迟缓和采食量下降.本文综述了家禽胆碱缺乏的临床特点、造成胆碱缺乏的主要因素以及胆碱缺乏对家禽健康和生长的影响及可能的机理,并且展望了胆碱在家禽生产上的应用.  相似文献   

明光市水稻常见病害的识别与防治     

缪志新 《商界．城乡致富》2014,(6):8-10

介绍了明光市水稻常见痛害,如稻曲痛、水稻细菌性条斑病、白绢病、条纹叶枯病、纹枯病的危害症状及识别特征,并从农业防治、化学防治方面提出了各个病害的防治方法。  相似文献   

犬感染性心内膜炎研究进展   总被引：1，自引：0，他引：1       下载免费PDF全文

雍康  张传师  杨庆稳 《家畜生态学报》2014,35(7):87-90

感染性心内膜炎(Infective Endocarditis,IE)是犬的一种致命性疾病,由病原微生物侵入心脏瓣膜或心内膜内皮细胞所引发。细菌是从病变瓣膜和壁内膜组织中分离的主要病原体,因此也称细菌性心内膜炎。临床上,犬患IE并不常见,但一旦发生,死亡率极高。IE由于病情发展迅速,缺乏特异性的临床症状,因此早期诊断比较困难。文章主要从发病机制、临床症状、诊断、治疗等方面对犬IE进行了综述,为有效防治该病提供依据。  相似文献   

鸡新城疫发病新特点分析及诊治     

王志芳 《西北农林科技大学学报(自然科学版)》2003,31(6):199-203

结合鸡新城疫的研究现状,分析了鸡新城疫的发病病因、流行特点、临床症状、病理变化和诊断鉴别方法,并总结了鸡新城疫的防护措施,提出重大疫情发生后的处理方法。  相似文献   

朱顶兰红斑病的研究：（Ⅱ）寄主范围及危害状     

姜凤丽 《浙江林学院学报》1993,10(3):303-307

朱顶兰红斑病病菌为Stagonospora curtisii(Berk.)Sacc.经接种试验和调查表明,此菌除危害朱顶兰外,还危害君子兰属的君子兰,文殊兰属的文殊兰,蜘蛛兰属的水鬼蕉,石蒜属的忽地笑、长筒石蒜、换锦花、夏水仙、中国石蒜、红蓝石蒜、石蒜、麦杆石蒜以及水仙属的水仙,总计危害6个属13种植物(包括孤挺花属的朱顶兰)。S.curtisii病菌在不同的寄主植物上呈现的症状有所不同,作者将其归纳为两类:一类呈现红斑,如朱顶兰、君子兰、水鬼蕉被害呈现圆形或纺缍形的红斑;另一类呈现褐斑,如文殊兰、忽地笑、水仙被害呈现褐斑或褐色条斑。  相似文献   

Analysis of Factors that Influence Kernel Weight of Wheat Infected by Septoria nodorum     

A. L. Scharen    R. E. Lund  M. E. Dietz-Holmes   《Plant Breeding》1991,106(3):242-249

Several methods for determining yield reduction resulting from Septoria nodorum blotch have appeared in the literature during the past decade. These methods varied from the measurement of effects of disease on components of yield to calculation of area of symptoms on certain leaves at different growth stages. We analyzed data from a uniform group of wheat entries in the USDA Septoria nursery that had been grown in seven locations in North America and Europe during the years 1982–1987. Symptom severity and height of symptom on the plant were compared to kernel number and kernel weight. Location, year-within-location and genotype were also considered. In the context of this study, we concluded that location, and year-within-location are the most important factors determining yield reduction (as measured by relative kernel weight). Selection directly for components of yield is quite effective, but selection by means of disease symptoms is often not correlated with yield. We also conclude that specific methods for relating symptoms to yield reduction that are applicable to a particular location are probably useful and appropriate for that location only.  相似文献