In botswana, grain or fodder cultivars of pearl millet and bambara, which is not attacked by the local biotype of the parasite, are potent stimulators of a. Walp presents severe challenges on smallholder farmers with a record of yield reduction up to 100% 1. Identification of sources of resistance to alectra vogelii in. A number of parasitic plants have become weeds, posing severe constraints to major crops including grain legumes. Awareness of the parasitic weed alectra vogelii benth. Screening techniques and sources of resistance against. Indirect selection for resistance to alectra vogelii. Easily share your publications and get them in front of issuus. New hosts of the parasitic flowering plant, alectra. To understand the dynamics of cell fate change and cellular lineage during haustorium development, we performed live imagingbased marker expression analysis and celllineage tracing during. Screening of alectra vogelii ecotypes on legume and non. Reaction and yield of cowpea varieties under alectra vogelii infestation at samaru, 2005.
Click on an acronym to view each weed list, or click here for a composite list of weeds of the u. Indirect selection for resistance to alectra vogelii benth infestation in cowpea vignaunguiculata l walp, international journal of environment agriculture and biotechnology,vol. In the first experiment, mkanakaufiti, it99k72122xit82e16, sudan 1 and it82e16 were grown in alectra infested and. Characterization of alectra vogelii witch weed strains using. Hannover messe and cemat 2018 supply industry, automation and drive technology pneumatichydraulic. Jan 01, 2001 the systematic relationships of four species in the south african holoparasitic genus hyobanche were examined using intersimple sequence repeat issr banding patterns and nucleotide sequence data from nuclear ribosomal its regions and the plastid gene rbcl. This plant may be known by one or more common names in different places, and some are listed above. Files are available under licenses specified on their description page. Global invasive potential of 10 parasitic witchweeds and. Alectra vogelii benth is a parasitic weed which causes significant yield reductions in cowpeas vignaunguiculatawalp in most of the subsaharan african countries. Crops, shown on this label to be suitable for treatment, may be replanted at any time. Summary although the angiospermous parasitic weed alectra vogelii is a major biotic constraint to cowpea production in africa, there is little information on the host. Alectra vogelii was first reported this part of africa in 1990 mbwaga, 1991 it was not until recently when it has started to attract the attention of many scholars e. Parasitic angiosperm alectra vogelii benth is a growing problem in malawi, particularly with.
Relationships within and among species of the holoparasitic. However, resistance against most parasitic weeds is difficult to access, scarce, of complex nature and of low heritability, making breeding for resistance a difficult task. The corporation also indirectly wholly owns aesi which, in turn, has wholly owned subsidiaries apsi and ua. The objective of this study was to establish the effect of alectra vogelii. This page was last edited on 11 december 2019, at 05. Annual financial statements year ended december 31, 2018. Alectra vogelii has been the major constraint known to attack leguminous species especially to. Alectra limits collection of personal information to that information, which is necessary for the purposes identified in this policy, is otherwise consented to by you, or permitted or required by law. A reference manual on striga distribution and control in tanzania. Material science and metallurgy by kodgire pdf lahixje. Species of the alectra genus are often referred to as yellow witchweeds. How do i link to a pdf as part of my product description. Therefore, two studies were set in order to understand the possible mechanisms of resistance in cowpea genotypes on their reaction to the parasitic weed.
Alectra vogelii benth and striga gesnerioides, both of the family orobanchaceae, which. The performance of vegetable cowpea vigna unguiculata l walp lines to in bauchi, nigeria. Screening wild vigna species and cowpea vigna unguiculata l. Pdf current approaches to alectra vogelii control in cowpea. There is therefore an urgent need to identify alectra resistant genotypes, possessing farmers desired traits, in cowpea germplasm in burkina faso. Merge pdf files combine pdfs in the order you want with the easiest pdf merger available.
Screening of seed soluble sugar content in cowpea vigna. Trapcrops produce the alectra germination stimulant in their root exudates but are not susceptible to attack by the parasite seedlings. Alectra is a local distribution company ldc and energy services provider, formed as a result of a merger of enersource, horizon and powerstream, and the subsequent purchase of hydro one brampton, from the province of ontario. Lectra is pleased to receive the productservice of the year award from the french chamber of commerce and industry in japan for its breakthrough products, fashion on demand by lectra and furniture on demand by lectra. Star of bethlehem ornithogalum umbellatum poison hemlock conium maculatum maiden grass miscanthus sinensis yellow witchweed alectra vogelii white campion silene latifolia subsp. Global invasive potential of 10 parasitic witchweeds and related orobanchaceae the plant family orobanchaceae includes many parasitic weeds that are also impressive invaders and aggressive. Pantera is quickly degraded in the soil and offers full rotational flexibility. With the file manager, you can upload multiple files at one time. Alectra vogelii is an annual parasitic herb with a wide host range, and it attacks economically important leguminous crops such as glycine max soybean, vigna unguiculata cowpea, cicer arietinum chickpea, and arachis hypogaea peanut in africa. It also aimed to identify functional groups in the powdered. Reference 4 reported that cowpea resistance against alectra vogelii. Alectra vogelii is a root parasitic weed mainly on economically important leguminous crops in a large part of the african continent.
Compatibility of alectra vogelii with different leguminous. The examples of type of personal information that alectra may request or. Ordination of issr data revealed discrete groups, although h. The feed the future legume innovation lab grain legume research conference the feed the future legume innovation lab grain legume research conference ouagadougou, burkina faso to 18 august 2017.
However, resistance genotypes to alectra vogelii are the most practical method as herbicide alternatives are costly 2. Pdf nature of resistance of cowpea alectra vogelii infestation. Parasitic angiosperm alectra vogelii benth is a growing problem in malawi, particularly with current emphasis on legumes. To change the order of your pdfs, drag and drop the files as you want. It gives indepth access for analysis and manipulation of the pdf and embedded formats such as fonts, metadata, color profiles, image compression and more. Pdf diallel analysis of cowpea vigna unguiculata l. Twelve days after infection, by transferring a germinating seed of the parasite directly onto the host. The feed the future legume innovation lab grain legume. From first creative spark to final product, our professional services address an endtoend process. Jul 03, 2018 iran dilleri obegine mensup bir dil konusan kurtlerin kulturunun temeli, mezopotamya menselidir. When germination of seeds was stimulated by cowpea vigna unguiculata root exudate, growth occurred mainly in the radicular pole of embryos and minimally in the plumular pole, resulting in seedlings with elongated radicles. Jun 28, 2012 this result opens up the potential for using the composite plant approach to evaluate various candidate genes that might be involved in cowpea resistance or susceptibility to s.
The ability of the root parasite alectra vogelii benth. View enhanced pdf access article on wiley online library html view download pdf for offline viewing. Despite its importance, the developmental processes of haustoria are mostly unknown. These include the cultivars it90k766 and it90k822 which have been released for commercial production in nigeria singh, 2000. Pdf alectra vogelii, a threat to bambara groundnut. The following guidelines should be followed for replanting if a crop, treated with pantera, failed for some reason e. Alectra includes about 30 species occurring primarily in tropical and subtropical africa.
Jan 24, 2020 ppq conducts weed risk assessments wra as part of its process for safeguarding u. Alectra vogelii has been the major constraint known to attack leguminous species. Feed the future innovation lab for collaborative research on grain legumes identification of sources of resistance to alectra vogelii in cowpea vigna unguiculata l. No file limit, no ad watermarks a free and beautiful tool to combine your pdf files exactly the way you want it. Convert mdl to plt with reaconverter batch conversion software. Improved cowpea cultivars which combine resistance to a.
Indirect selection for resistance to alectra vogelii benth. Pdf response of alectra vogelii benth to different crop root. Walp is a legume crop grown worldwide to provide protein, starch, soluble sugar, amino acids, fatty acids, minerals, and vitamins for human consumption and animal feed. Although presently, alectra infestation is considered less dramatic than that of striga, total yield loss is not uncommon in fields heavily infested by these parasites when susceptible varieties of cowpea are planted. It also aimed to identify functional groups in the powdered root samples that stimulate a. If for any reason you dont see the upgrade message and you have an existing installation, dont continue, but instead contact inflectra customer support first. Pdf alectra vogelii benth is parasitic weed which causes significant yield reductions in cowpea vigna unguiculatawalp in africa. All structured data from the file and property namespaces is available under the creative commons cc0 license. A greenhouse pot experiment was conducted at the university of zimbabwe to screen six cowpea varieties for resistance to alectra vogelii infection. Sep 07, 2014 this page was last edited on 2 september 2017, at 19. Request pdf screening of alectra vogelii ecotypes on legume and nonlegume crop species in malawi the parasitic angiosperm alectra vogelii benth. Alectra targets base pay and total direct compensation at the 50th percentile of the competitive market. Cowpea was grown in pots containing 50, 2700 or 4000 a. This then indicates that there are differences in mechanisms of resistance and the genes controlling resistance to these parasitic weeds in different varieties.
When the device is connected to the pc for the first time, the drivers will be installed with little interaction from. Alectra vogelii benth is a parasitic weed which causes significant yield reduction in. Alectra serves approximately one million customers in the greater golden. In burkina faso, cowpea serves as both a food and cash crop generating significant income for stakeholders. This plant can be weedy or invasive according to the authoritative sources noted below. Alectra vogelii on cowpea in nigeria right and alectra sessiliflora in namibia left. The other two genera treated herein, aeginetia and alectra, are comparatively less common. However, cowpea production is seriously hampered by several constraints among which is the parasitic weed alectra vogelii. In this instance the installer will update the program files on your computer and migrate your data into the new version seamlessly. Joyful tatenda rugare and stanford mabasa department of crop science, university of zimbabwe, p. Striga research in southern africa and strategies for regionalized control options. Merge pdfs by clicking the button and installing the new tab.
Lectra in fashion with over 40 years experience in fashion and apparel, lectras mission is to provide a complete spectrum of design, development and production solutions to confront 21stcentury challenges. Screening for resistance mechanisms in cowpea genotypes on. Anatomical investigations were carried out on the structure and development of the mature secondary haustorium in alectra vogelii growing on arachis hypogaea or vigna unguiculata. Anatomical changes in the radicle and shoot meristems of embryos of germinating seeds of the obligate root parasites, alectra vogelii and striga gesnerioides were studied. It is a common parasite of peanut in angola, burkina faso, malawi, mozambique. Hostparasite relations between cowpea and alectra vogelii. Conclude on the appropriateness of managements use of the going concern basis of accounting and, based on the audit evidence obtained, whether a material uncertainty exists related to events or conditions. The haustorium in parasitic plants is an organ specialized for invasion and nutrient uptake from host plant tissues. We are equipped to discover the possibilities of energy conservation and new technologies for enhancing the quality of life in the communities we serve.
Response of alectra vogelii benth to different crop root exudates. So you can save the time and energy you would lose with doing repetitive operations. Participatory market led cowpea breeding in sub saharan. Data files are executed sequentially, operations can only refer to the result of operations defined previously. Alectra s 2018 financial statements have been provided to each of the shareholders as required pursuant to section 2. Triangulos rectangulos notables download as word doc. Pdf indirect selection for resistance to alectra vogelii. Text is available under the creative commons attributionsharealike license. Alectra vogelii cycle before ground emergence comprised of germination, haustorial induction, attachments to the host roots which allowed penetration of the host vascular cells 14. Each stage is critical for the successful develop ment of the parasitic weed in different host plants 3 15 16.
Following the formation of the young secondary haustorium, both the cambium and pericycle of the host root directly opposite the young secondary haustorium are stimulated to divide and form. Scrophulariaceae is a serious root hemiparasite of cowpea, groundnut, bambaranut and soybean. Scrophulariaceae is a vascular hemiparasite of various leguminous crops in africa, including peanut arachis hypogaea, bambara groundnut vigna subterranea, cowpea vigna unguiculata, common bean phaseolus vulgaris, soybean glycine max, and mung bean vigna radiata 1. Nevertheless, cultural control practices benefits are long term solutions. Our mission is to be the energy ally that our customers expect us to be. Accordingly, the dry matter production and partitioning in a cowpea. A technical manual for parasitic weed research and.
The aim of the study was to evaluate the effect of root exudates from cowpea, groundnut, maize, sorghum and pearl millet genotypes on the germination and attachment of alectra vogelii. American journal of botany botanical society of america. Pdf on sep 10, 2019, zakaria dieni and others published diallel analysis of cowpea vigna unguiculata l. Jun 29, 2019 amaryl lids to download pdf you need some things, like my website and the name of the file. The 28454a is a member of the precision 28000 family of signal conditioners. Updated alectra strategic goals, probabilities, risk consequences and risk matrix. Identification of sources of resistance to alectra vogelii. Induced cell fate transitions at multiple cell layers. Pdf response of alectra vogelii benth to different crop. Hence, the objective of the experiment was the identification of phylogenetically differences and differential responses of a. Jan 08, 2019 to download pdf you need some things, like my website and the name of the file.
Effect of cowpea genotypes on alectra vogelii emergence at 55 days after planting dap. Curriculum vitae name mansur auwalu bindawa address. The effects of solutions of sodium hypochlorite and calcium hypochlorite bleach on dormancy and germination of alectra vogelii seeds were investigated. Pdf nature of resistance of cowpea alectra vogelii. Journal to publish research papers in the field of environment, agriculture and biotechnology. Asian journal of agriculture and rural development, 39 20. Alectra vogelii has been the major constraint known to attack leguminous species especially to cowpea production.
Breeding for resistance is acknowledged as the major component of an integrated control strategy. Issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Walp genotypes to alectra vogelii in the northern guinea savanna of nigeria. Alectra vogelii yield reduction up to 100% need for sources of resistance. Screening for resistance mechanisms in cowpea genotypes. Serious infestation causes stunted crop growth, wilting and yield loss.