应用本土寄生蜂防治松突圆蚧效果     

冯莹  谢伟忠  许少嫦  高亿波  方天松  陈瑞屏 《林业科技开发》2014,28(3)

对广东省信宜市应用本土寄生蜂防控松突圆蚧效果进行了调查.结果表明,在信宜林科所、尚文水库尾和安峨大六村,应用本土寄生蜂防治松突圆蚧效果较稳定,防治效果均在50％以上,其中信宜林科所的防治效果高达85.91％.放蜂点环境、放蜂方法和时间对防治效果有较大影响.  相似文献   

哈尔滨北方森林动物园观赏肉食目动物寄生蠕虫感染情况调查   总被引：1，自引：0，他引：1  

邹希明  杨文辉  张丽冰  王春仁 《中国兽医寄生虫病》2009,17(3):73-75

为了解哈尔滨北方森林动物园观赏肉食目动物寄生蠕虫的感染状况，于2009年3～5月采用饱和盐水漂浮法和水洗沉淀法对犬、猫、熊和浣熊4科的67只观赏肉食目动物粪便进行了蠕虫虫卵检查。结果有19只检出虫卵，感染率为28．4％。其中猫科、熊科、浣熊科、犬科的感染率分别为63．6％、16．7％、14．3％和5．0％，在检出的虫卵中，各种蛔虫卵占优势。该调查为动物园制定肉食目动物驱虫方案奠定了基础。  相似文献   

毛刺科（Trichodoridae）线虫分类概况　Ⅱ. 属种鉴定和种的名录     

胡先奇  董文汉 《云南农业大学学报(自然科学版)》2001,16(2):149-153

 概述了毛刺科及毛刺属（Trichodorus Cobb, 1913）,拟毛刺属（Paratrichodorus Siddiqi, 1974）,单毛刺属（Monotrichodorus Andrassy, 1976）和异毛刺属（Allotrichodorus Rodriguez-M, Sher &; Siddiqi, 1978）鉴别特征,列出迄今已描述的94种1亚种和1裸名种的名录。  相似文献   

Virulence characteristics of a new race of the parasitic angiosperm,Striga gesnerioides,from southern Benin on cowpea (Vigna unguiculata)     

J. A. Lane  T. H. M. Moore  D. V. Child  K. F. Cardwell  B. B. Singh  J. A. Bailey 《Euphytica》1993,72(3):183-188

An in vitro growth system was used to determine the virulence of two samples of Striga gesnerioides from Zakpota in southern Benin. Cowpea variety B301, previously considered resistant to all races of S. gesnerioides, was susceptible to both samples of the parasite. Two other cowpea varieties, 58–57 and IT81D-994, were totally resistant. Resistance in 58–57 was associated with a hypersensitive necrosis of infected roots, whilst IT81D-994 supported production of small S. gesnerioides tubercles with stems which failed to develop. Striga gesnerioides from southern Benin is the fourth race of the parasite to be identified, and the first with virulence on variety B301. The implications for breeding cowpeas with resistance to S. gesnerioides are discussed.Abbreviations IITA International Institute of Tropical Agriculture - LARS Long Ashton Research Station - SAFGRAD Semi-Arid Food Grain Research and Development  相似文献   

Genetics of Resistance in Vicia sativa L. to Orobanche crenata Forsk.     

J. Gil    L. M. Martin  J. I. Cubero 《Plant Breeding》1987,99(2):134-143

The genetics of resistance of common vetch (Vicia sativa L.) to broomrape (Orobanche crenata Forsk.) was studied for two years by using the P₁, P₂, F₁, BC¹, BC₂, F₂ F₃, and F₄ generations obtained from crosses between resistant and susceptible lines. Resistant lines were selected by screening a world collection m a naturally infested plot. Resistance was tested both under field and greenhouse conditions. The best index to measure resistance was the number of emerged broomrapes per host plant. The results fit the additive-dominance model. The main component of the variation was additivity; dominance and interaction effects seemed to depend on the environment. When dominance is expressed, a low number is dominant over a high number of broomrapes per host plant.  相似文献   

Characterization of host tolerance to Striga hermonthica     

Jonne Rodenburg  Lammert Bastiaans  Martin J. Kropff 《Euphytica》2006,147(3):353-365

Summary One of the most promising control options against the parasitic weed Striga hermonthica is the use of crop varieties that combine resistance with high levels of tolerance. The aim of this study was to clarify the relation between Striga infestation level, Striga infection level and relative yield loss of sorghum and to use this insight for exploring the options for a proper screening procedure for tolerance. In three pot experiments, conducted in Mali (2003) and The Netherlands (2003, 2004), four sorghum genotypes were exposed to a range of Striga infestation levels, ranging from 0.0625 to 16 seeds cm⁻³. Observations included regular Striga emergence counts and sorghum grain yield at maturity. There were significant genotype, infestation and genotype × infestation effects on sorghum yield. The relation between infestation level and infection level was density dependent. Furthermore, the relation between Striga infection level and relative yield loss was non-linear, though for the most resistant genotype Framida only the linear part of the relation was obtained, as even at high infestation levels only moderate infection levels were achieved. The results suggest that for resistant genotypes, tolerance can best be quantified as a reduced relative yield loss per aboveground Striga plant, whereas for less resistant genotypes the maximum relative yield loss can best be used. Whether both expressions of tolerance are interrelated could not be resolved. Complications of screening for tolerance under field conditions are discussed.  相似文献   

黄圆蹄盾蚧寄生蜂的空间分布     

时玉娟  陶玫  陈国华  王彩花 《云南农业大学学报(自然科学版)》2007,22(1):54-56

 通过系统调查和室内饲养得出,云南省安宁市香樟上黄圆蹄盾蚧（Aonidiella citrina）的寄生蜂共有3种,即双带巨角跳小蜂［Comperiella bifasciata（Howard）］、盾蚧长缨蚜小蜂［Aspidiotiphagus citrinus(ctaw)］和双带花角蚜小蜂［Azotus perspeciosus(Girault)］。黄圆蹄盾蚧寄生蜂在香樟不同方位上的分布不同。在层次上,寄生蜂在外层的平均寄生率要比内层高;在方位上,寄生蜂在南面的平均寄生率最高,而在北面的平均寄生率最低,东西方位的平均寄生率差别不显著。通过Talor幂法和Iwao的回归分析对黄圆蹄盾蚧寄生蜂的空间分布型进行研究,得出的结果均一致,即黄圆蹄盾蚧寄生蜂种群在香樟上的空间分布型为均匀分布,且种群密度越高分布越均匀。  相似文献   

茶蛀梗虫幼虫寄生性昆虫的调查     

萧铁光  宋慧英  陈常铭 《湖南农业大学学报(自然科学版)》1992,(2)

茶蛀梗虫Casmara patrona Mey rick是湖南茶树的一种重要害虫。已发现有4种天敌昆虫可寄生其幼虫,其学名是:Psen pulcherrimus,Bracon sp.,Macrocentrus sp.和Eriborus tere-brans (Gravenhorst)。前2种是中国新记载种,后2种是中国新寄主记录种。本文叙述了它们的形态特征、生活习性和采集地或分布。Eriborus terebrans是湖南茶园寄生茶蛀梗虫幼虫的优势种类,在长沙它的自然寄生率可达11%。Psen pulcherrimus是次优的寄生蜂,其自然寄生率稍低于前者。  相似文献   

Cloning and expression of nucleocapsid protein gene of TGEV HB06 strain     

Jinghui Fan  Yuzhu Zuo  Yuelan Zhao  Tanqing Li  Xiaobo Zhang 《Frontiers of Agriculture in China》2007,1(3):357-360

The nucleocapsid protein gene of transmissible gastroenteritis virus, 1 149 bp in length, was amplified by RT-PCR from isolated strain HB06 and cloned into pMD18-T. Sequence comparison with other transmissible gastroenteritis virus (TGEV) strains selected from the Gene Bank revealed that the homology of N gene complete sequence shares more than 97% in nucleotide. N gene was cloned into BamHI and EcoRI multiple cloning sites of the prokaryotic expression vector pET 20 b, and named pETN. After being induced by isopropyl-β-D-thiogalactopyranoside (IPTG), the recombinant nucleocapsid protein was expressed. The result of SDS-PAGE and Western-blot showed that the recombinant nucleocapsid protein was 47 kDa and had strong positive reactions with TGEV-specific antibody.  相似文献   

北方森林动物园观赏鸟类寄生蠕虫的调查研究     

张旭  邹晞明  杨文辉  邓爱怀  张佩新  耿仁德  王春仁 《黑龙江八一农垦大学学报》2007,19(1):60-63

为了解北方森林动物园观赏鸟类寄生蠕虫的感染情况,于2006年3～6月采用饱和盐水漂浮法和水洗沉淀法对园内12科158只观赏鸟的粪便进行了蠕虫虫卵检查,结果有32只鸟检出虫卵,感染率为20.3%,雉科、鹤科和鸭科的感染率分别为60%、35.7%和18.5%,检出的虫卵为蛔虫、毛细线虫和棘口吸虫卵。该调查为动物园制定鸟类驱虫方案奠定了基础。  相似文献