甘薯地土壤线虫群体分布规律及取样方法研究   总被引：2，自引：0，他引：2  

海棠  武保悦  金凤柱  胡跃高 《中国植保导刊》2006,26(10):7-10

在5年连作甘薯地,于甘薯移栽前和移栽后的不同时间,调查甘薯穴中和穴间、株间和行间以及各样点不同土层线虫的群体数量。分析明确了植物寄生线虫和非植物寄生线虫群体的水平分布和垂直分布规律,提出了研究和了解甘薯地土壤线虫发生动态的调查取样方法。  相似文献   

甜玉米田玉米螟发生危害及防治措施   总被引：6，自引：1，他引：6  

汪洋洲  ;王振营;何康来;孙庆田 《植物保护》2006,32(1):13-18

甜玉米在我国大面积种植历史较短,对甜玉米田亚洲玉米螟发生危害和防治技术研究较少。本文对国内外甜玉米上玉米螟成虫产卵习性、幼虫危害和防治技术研究和应用现状进行了综述,为我国甜玉米田亚洲玉米螟的研究和防治提供参考。  相似文献   

甘薯种质资源的创新与利用     

郭小丁谢一芝  尹晴红 《中国蔬菜》2006,(B10):81-83

甘薯为无性繁殖作物，种质资源材料的创新可通过3种途径实现，常规杂交为主要应用方法；通过无性系变异选择获得特定变异的种质材料有一定难度；通过原生质体融合导入近缘野生种的基因，或通过转基因技术导入外源基因，生物技术的应用在甘薯上取得了一些进展。目前甘薯的主要用途分为两大类，一是利用薯肉为桔红心和紫心的品种作为保健型鲜食品种，二是利用高产、高淀粉含量的淀粉型品种作为工业原料。  相似文献   

紫花桔梗和白花桔梗的RAPD指纹图谱鉴定研究   总被引：5，自引：0，他引：5  

王立平  孙丽娜  薛均诚  吴松权  吴基日 《北方园艺》2007,(5):40-41

用RAPD方法对紫花桔梗和白花桔梗进行了指纹图谱的研究，以期为桔梗花色的鉴定提供分子依据。采用BSA法从200个随机引物中筛选出具有多态性的7个引物。结果引物OPG02在检测的紫花桔梗个体中均能各自扩增出一条580bp左右的特异带，而在白花桔梗中则未见。表明该RAPD标记具有紫花桔梗特异性，可用于鉴别紫花桔梗和白花桔梗。  相似文献   

Mottle necrosis of sweet potato caused by <Emphasis Type="Italic">Pythium scleroteichum</Emphasis> in Japan and varietal difference in susceptibility to the disease     

Motoaki Tojo  Ken Watanabe  Kenichi Kida  Yingjie Li  Shuhei Numata 《Journal of General Plant Pathology》2007,73(2):121-124

Severe mottle necrosis (Shirogusare-byo in Japanese) was found on mature tubers of sweet potato (Ipomoea batatas) in Ibaraki Prefecture in October 2004. The causal organism was identified as Pythium scleroteichum hitherto unknown in Japan. Sweet potato cultivar Purple Sweet Lord was more susceptible than cultivars Beniazuma, Benimasari, Koukei-14, and Tamayutaka to the pathogen at 25°C, while this difference in the susceptibility was not clear at 15°C.  相似文献   

<Emphasis Type="Italic">Spongospora subterranea</Emphasis> soil contamination and its relationship to severity of powdery scab on potatoes     

Takato Nakayama  Mitsuo Horita  Tadayuki Shimanuki 《Journal of General Plant Pathology》2007,73(4):229-234

We investigated soil contamination by Spongospora subterranea f. sp. subterranea (Sss) and disease severity of powdery scab in 29 potato fields in Hokkaido, Japan, using a hydroponic culture method with tomato seedlings as bait plants. The quantity of Sss infection on the roots of bait plants was evaluated using the polymerase chain reaction (PCR) and expressed in terms of the infection potential in the soil. The infection potential was positively correlated with the disease severity of harvested tubers, whereas the spore ball density determined using PCR had an indistinct relationship with disease severity. The infection potential can be useful in evaluating soil contamination and in applying countermeasures against powdery scab.  相似文献   

甘薯膨大素对慈菇生长发育的影响     

江解增  曹碚生 《长江蔬菜》1998,(4):26-28

施用甘薯膨胀大素可改善慈菇营养生长状况,促进慈菇球茎的膨大,球茎开始膨大时叶面喷施甘薯膨大素,可显著增加早期产量;定植时及球茎开始膨大时２次施用甘薯膨大素,早期产量增加不显著,总产量显著增加。  相似文献   

Leaf necrosis and twig dieback of sweet persimmon (Dyospiros kaki L.) caused by Pseudomonas syringae pv. syringae in Italy     

M. Scortichini  D. D'Ascenzo  Daniela Di Silvestro 《European journal of plant pathology / European Foundation for Plant Pathology》1998,104(6):625-627

In spring 1996, extensive leaf necrosis and twig dieback were observed on young sweet persimmon (Dyospiros kaki L.) trees, cultivars O'Gosho, Hachija, Mercatelli and Kaki-tipo planted in the Abruzzo region (central Italy). Many trees were killed. When the dieback reached the trunk, in many cases, new vegetation was noticed above the graft point. The cultivar Jiro-C was not affected by the disease. During 1997, no symptoms were observed on any plant. The orchard was planted in a clay soil with a very low content of organic matter. Biochemical, nutritional and pathogenicity tests indicated Pseudomonas syringae pv. syringae van Hall as the causal agent of the disease. This is the first report of this bacterium as a pathogen of sweet persimmon in Europe.  相似文献   

棚栽日本网纹甜瓜病虫害发生情况调查     

陈彩贤 《广西农学报》2010,25(6):32-34,44

针对网纹甜瓜生长最为关键的开花和座果期进行了网纹甜瓜的病虫害系统调查。调查结果显示,网纹甜瓜主要病虫害有温室白粉虱、蚜虫、美洲斑潜蝇、瓜绢螟、蛞蝓、枯萎病、霜霉病和病毒病;发生最严重的害虫是温室白粉虱,其次是蚜虫,其后依次是美洲斑潜蝇、瓜绢螟和蛞蝓,最高虫口密度分别达57头/叶、35头/叶、6头/株、27头/百株、21头/百株;在病害中,最早出现的病害是霜霉病,然后是病毒病和枯萎病。霜霉病病株率从3%不断上升至11%;病毒病病株率从3%不断上升至15%,枯萎病病株率从1%上升至8%,其中以枯萎病造成的损失最重。  相似文献   

不同施肥水平对马铃薯品质的影响   总被引：3，自引：1，他引：2  

田国政  艾训儒  易永梅  王柏泉  刘洋 《湖北农业科学》2009,48(7)

在平地和坡地条件下,采用4种施肥水平对鄂马铃薯4号品种进行栽培试验,考察不同施肥水平下对马铃薯淀粉品质的影响.结果表明,不同施肥水平下,平地和坡地栽培马铃薯,其淀粉含量达到显著性差异,施低肥时淀粉的含量较高,随着施肥量的增加,淀粉含量随之下降;在相同施肥水平下平地较坡地马铃薯淀粉含量的变化大,说明马铃薯淀粉除受施肥量影响外,还受地形、环境的影响,坡地存在水土流失,导致坡地比平地栽培马铃薯的淀粉含量低0.89%～3.86%.因此,合理栽培、适度开发利用土地资源以及重视水土保持尤为重要.  相似文献