Alectra vogelii on cowpea in nigeria right and alectra sessiliflora in namibia left. 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. This then indicates that there are differences in mechanisms of resistance and the genes controlling resistance to these parasitic weeds in different varieties. Curriculum vitae name mansur auwalu bindawa address.
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. A number of parasitic plants have become weeds, posing severe constraints to major crops including grain legumes. Alectra vogelii is a parasitic weed found in major leguminous crops, including chickpea. Alectra vogelii has been the major constraint known to attack leguminous species especially to cowpea production. Alectra vogelii benth is a parasitic weed which causes significant yield reductions in cowpeas vignaunguiculatawalp in most of the subsaharan african countries. In the first experiment, mkanakaufiti, it99k72122xit82e16, sudan 1 and it82e16 were grown in alectra infested and. Cowpea was grown in pots containing 50, 2700 or 4000 a. It also aimed to identify functional groups in the powdered root samples that stimulate a. 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. Breeding for resistance is acknowledged as the major component of an integrated control strategy. This plant can be weedy or invasive according to the authoritative sources noted below. 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.
Walp genotypes to alectra vogelii in the northern guinea savanna of nigeria. Screening of alectra vogelii ecotypes on legume and non. With the file manager, you can upload multiple files at one time. Effect of cowpea genotypes on alectra vogelii emergence at 55 days after planting dap. Material science and metallurgy by kodgire pdf lahixje.
The haustorium in parasitic plants is an organ specialized for invasion and nutrient uptake from host plant tissues. The objective of this study was to establish the effect of alectra vogelii. The feed the future legume innovation lab grain legume. Identification of sources of resistance to alectra vogelii. New hosts of the parasitic flowering plant, alectra. Scrophulariaceae is a serious root hemiparasite of cowpea, groundnut, bambaranut and soybean. American journal of botany botanical society of america. 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. Each stage is critical for the successful develop ment of the parasitic weed in different host plants 3 15 16. Feed the future innovation lab for collaborative research on grain legumes identification of sources of resistance to alectra vogelii in cowpea vigna unguiculata l. It is a common parasite of peanut in angola, burkina faso, malawi, mozambique. 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.
All structured data from the file and property namespaces is available under the creative commons cc0 license. Pdf current approaches to alectra vogelii control in cowpea. 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. Parasitic angiosperm alectra vogelii benth is a growing problem in malawi, particularly with current emphasis on legumes. 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. A technical manual for parasitic weed research and. The corporation also indirectly wholly owns aesi which, in turn, has wholly owned subsidiaries apsi and ua. Therefore, two studies were set in order to understand the possible mechanisms of resistance in cowpea genotypes on their reaction to the parasitic weed. Pdf alectra vogelii benth is parasitic weed which causes significant yield reductions in cowpea vigna unguiculatawalp in africa.
The effects of solutions of sodium hypochlorite and calcium hypochlorite bleach on dormancy and germination of alectra vogelii seeds were investigated. Crops, shown on this label to be suitable for treatment, may be replanted at any time. Files are available under licenses specified on their description page. Identification of sources of resistance to alectra vogelii in. Global invasive potential of 10 parasitic witchweeds and.
Pdf on sep 10, 2019, zakaria dieni and others published diallel analysis of cowpea vigna unguiculata l. Indirect selection for resistance to alectra vogelii. Issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. 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. Nevertheless, cultural control practices benefits are long term solutions. Pdf indirect selection for resistance to alectra vogelii. Screening wild vigna species and cowpea vigna unguiculata l. In this instance the installer will update the program files on your computer and migrate your data into the new version seamlessly.
Jan 24, 2020 ppq conducts weed risk assessments wra as part of its process for safeguarding u. Species of the alectra genus are often referred to as yellow witchweeds. Easily share your publications and get them in front of issuus. Despite its importance, the developmental processes of haustoria are mostly unknown. It also aimed to identify functional groups in the powdered. Parasitic angiosperm alectra vogelii benth is a growing problem in malawi, particularly with. Ordination of issr data revealed discrete groups, although h. A greenhouse pot experiment was conducted at the university of zimbabwe to screen six cowpea varieties for resistance to alectra vogelii infection.
The ability of the root parasite alectra vogelii benth. This plant may be known by one or more common names in different places, and some are listed above. Pdf alectra vogelii, a threat to bambara groundnut. Hence, the objective of the experiment was the identification of phylogenetically differences and differential responses of a. Walp presents severe challenges on smallholder farmers with a record of yield reduction up to 100% 1. 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. Serious infestation causes stunted crop growth, wilting and yield loss. Alectra s 2018 financial statements have been provided to each of the shareholders as required pursuant to section 2. When the device is connected to the pc for the first time, the drivers will be installed with little interaction from. So you can save the time and energy you would lose with doing repetitive operations. Our mission is to be the energy ally that our customers expect us to be. 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.
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 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. There is therefore an urgent need to identify alectra resistant genotypes, possessing farmers desired traits, in cowpea germplasm in burkina faso. Asian journal of agriculture and rural development, 39 20. A reference manual on striga distribution and control in tanzania. Pdf response of alectra vogelii benth to different crop root.
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. Characterization of alectra vogelii witch weed strains using. Awareness of the parasitic weed alectra vogelii benth. 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. Indirect selection for resistance to alectra vogelii benth infestation in cowpea vignaunguiculata l walp, international journal of environment agriculture and biotechnology,vol. The other two genera treated herein, aeginetia and alectra, are comparatively less common. Screening for resistance mechanisms in cowpea genotypes on. We are equipped to discover the possibilities of energy conservation and new technologies for enhancing the quality of life in the communities we serve. Sep 07, 2014 this page was last edited on 2 september 2017, at 19. Merge pdfs by clicking the button and installing the new tab. Journal to publish research papers in the field of environment, agriculture and biotechnology. Pdf nature of resistance of cowpea alectra vogelii infestation. The examples of type of personal information that alectra may request or. Striga research in southern africa and strategies for regionalized control options.
However, resistance genotypes to alectra vogelii are the most practical method as herbicide alternatives are costly 2. Reference 4 reported that cowpea resistance against alectra vogelii. Hannover messe and cemat 2018 supply industry, automation and drive technology pneumatichydraulic. Alectra vogelii benth is a parasitic weed which causes significant yield reduction in. Jul 03, 2018 iran dilleri obegine mensup bir dil konusan kurtlerin kulturunun temeli, mezopotamya menselidir. 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. This page was last edited on 11 december 2019, at 05.
Compatibility of alectra vogelii with different leguminous. Alectra vogelii has been the major constraint known to attack leguminous species especially to. Alectra targets base pay and total direct compensation at the 50th percentile of the competitive market. The hrcc retains and utilizes discretion to compensate an executive outside of this range in appropriate. From first creative spark to final product, our professional services address an endtoend process. Joyful tatenda rugare and stanford mabasa department of crop science, university of zimbabwe, p. Response of alectra vogelii benth to different crop root exudates. Request pdf screening of alectra vogelii ecotypes on legume and nonlegume crop species in malawi the parasitic angiosperm alectra vogelii benth. Induced cell fate transitions at multiple cell layers.
Alectra serves approximately one million customers in the greater golden. These include the cultivars it90k766 and it90k822 which have been released for commercial production in nigeria singh, 2000. Star of bethlehem ornithogalum umbellatum poison hemlock conium maculatum maiden grass miscanthus sinensis yellow witchweed alectra vogelii white campion silene latifolia subsp. Updated alectra strategic goals, probabilities, risk consequences and risk matrix. Jun 29, 2019 amaryl lids to download pdf you need some things, like my website and the name of the file. Indirect selection for resistance to alectra vogelii benth. Accordingly, the dry matter production and partitioning in a cowpea. 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.
The 28454a is a member of the precision 28000 family of signal conditioners. 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. Text is available under the creative commons attributionsharealike license. Relationships within and among species of the holoparasitic. Pdf diallel analysis of cowpea vigna unguiculata l. The following guidelines should be followed for replanting if a crop, treated with pantera, failed for some reason e. 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. Data files are executed sequentially, operations can only refer to the result of operations defined previously. Annual financial statements year ended december 31, 2018. Strong cross incompatibility between the wild vigna species and cowpea vigna unguiculata constitutes a major constraint to moving desirable genes into cultivated cowpea varieties.
Rearrange individual pages or entire files in the desired order. Alectra vogelii benth and striga gesnerioides, both of the family orobanchaceae, which. However, cowpea production is seriously hampered by several constraints among which is the parasitic weed alectra vogelii. 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. Triangulos rectangulos notables download as word doc.
Pdf nature of resistance of cowpea alectra vogelii. The widespread incidence of alectra vogelii benth on cowpea vigna unguiculata l. Screening techniques and sources of resistance against. Click on an acronym to view each weed list, or click here for a composite list of weeds of the u. 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. It gives indepth access for analysis and manipulation of the pdf and embedded formats such as fonts, metadata, color profiles, image compression and more. Participatory market led cowpea breeding in sub saharan. View enhanced pdf access article on wiley online library html view download pdf for offline viewing. 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. It provides conditioning for strain gages, rtds, or other resistive nonselfgenerating transducers with. 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.
Alectra vogelii has been the major constraint known to attack leguminous species. Alectra includes about 30 species occurring primarily in tropical and subtropical africa. Alectra vogelii is a root parasitic weed mainly on economically important leguminous crops in a large part of the african continent. Reaction and yield of cowpea varieties under alectra vogelii infestation at samaru, 2005. Improved cowpea cultivars which combine resistance to a. Merge pdf files combine pdfs in the order you want with the easiest pdf merger available. How do i link to a pdf as part of my product description. In burkina faso, cowpea serves as both a food and cash crop generating significant income for stakeholders. Screening of seed soluble sugar content in cowpea vigna. Total direct compensation def ined as base pay plus shortterm and longterm incentives. To change the order of your pdfs, drag and drop the files as you want. 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. Trapcrops produce the alectra germination stimulant in their root exudates but are not susceptible to attack by the parasite seedlings.
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. Twelve days after infection, by transferring a germinating seed of the parasite directly onto the host. Hostparasite relations between cowpea and alectra vogelii. Pantera is quickly degraded in the soil and offers full rotational flexibility. Convert mdl to plt with reaconverter batch conversion software. Jan 08, 2019 to download pdf you need some things, like my website and the name of the file.
893 781 394 479 1526 907 1111 1263 1538 1221 650 470 139 958 830 1350 1141 562 1198 606 1128 375 832 1249 606 829 743 1187 1010 910 383 831 346