Download or read book Management Strategies for Control of Soybean Cyst Nematode and Their Effect on the Nematode Community written by Zane Joseph Grabau and published by . This book was released on 2013 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Management Strategies to Improve Soybean Yield in High PH Soybean Cyst Nematode Infested Fields written by Vladimir Azevedo Da Costa and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biology and Management of the Soybean Cyst Nematode written by Robert D. Riggs and published by American Phytopathological Society. This book was released on 1992 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1 History, distribution, and economics. 2 Systematics and morphology. 3 Epiphytology and life cycle. 4 Cellular responses to infection. 5 Population dynamics. 6 Genetics. 7 The race concept. 8 Nematode race identification, A look to the future. 9 Interactions with other organisms. 10 Host range. 11 Chemical control. 12 Management by cultural practices. 13 Biological control. 14 Breeding for resistance to soybean cyst nematode. 15 Cytopathological reactions of resistant soybean plants to nematode invasion. 16 Tolerance in soybean.

Download or read book Integrated Nematode Management written by Richard A. Sikora and published by Cabi. This book was released on 2021 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant parasitic nematodes are costly burdens of crop production, causing an estimated US$80 - 118 billion per year in damage to crops. They are associated with nearly every important agricultural crop, and are a significant constraint on global food security. Regulations on the use of chemical pesticides have resulted in growing interest in alternative methods of nematode control. Future changes in climate, cropping systems, food habits, as well as social and environmental factors also affect the options for nematode control. Taking a systematic crop by crop approach, this book: Outlines the economic importance of specific plant parasitic nematode problems on the major food and industrial crops. Presents the state-of-the-art management strategies that have been developed to reduce specific nematode impacts, and outlines their limitations. Contains case studies to illustrate impact in the field. Aims to anticipate future changes in nematode disease pressure that might develop as a result of climate change, and new cropping systems.

Download or read book Evaluation of Alternative Weed Hosts and Management Strategies for Soybean Cyst Nematode in South Dakota written by Pawan Basnet and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluations of Biological Control Agents for the Management of Soybean Cyst Nematode Heterodera Glycines in Soybean Glycine Max L Merr written by Kelsie M. Musil and published by . This book was released on 2016 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: The soybean cyst nematode (SCN, Heterodera glycines) is the most yield limiting pathogen of soybeans (Glycine max L. Merr.). Current management strategies of crop rotation and using resistant varieties are not completely effective and alternative management strategies are needed. Commercial seed treatments with biological agents are available to protect against yield loss from SCN, but have not been evaluated in Nebraska. Field studies were conducted in eight Nebraska locations (six infested with SCN and two non-infested) during 2014 and 2015 to evaluate seed treatment effects on soybean establishment, SCN population density, and yield. The seed treatments were CruiserMaxx® Advanced, Clariva®Complete Beans containing Clariva®pn (Pasteuria nishizawae), and Poncho®/ VOTiVO® containing Bacillus firmus I-1582; all treatments contained the same fungicides and an insecticide with the same mode of action. Average yields in the SCN infested fields ranged from 45 to 72 bu/A and initial SCN population densities ranged from 200 to 4,300 eggs/100 cc's of soil. No statistical differences were found among the three treatments in either yield or SCN reproduction at any individual location or when the SCN infested locations were combined in either growing season. The use of cover crops (cereal rye, Secale cereale), and other bacteria have inconsistently reduced SCN populations in previous studies. The use a cover crop as a means to establish a biocontrol agent has not been investigated. Greenhouse experiments were conducted to evaluate the ability of the bacterium Lysobacter enzymogenes C3 to colonize the rhizospheres of cereal rye and soybean from populations applied to seed. The bacterium was found to colonize cereal rye roots to higher population levels than soybean over 4 week periods. C3 root populations on cereal rye increased by a thousand fold from seed populations. Based on these studies the potential for biocontrol for SCN exists, but more research is needed to determine optimum conditions for biocontrol agents to be effective tools in sustainable soybean production..

Download or read book Management Strategies for Controlling Cereal Cyst Nematode written by A. D. Rovira and published by . This book was released on 1982 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Utilization of Plant Materials for Control of Soybean Cyst Nematode written by Hassan M. Auwal and published by LAP Lambert Academic Publishing. This book was released on 2015-09-24 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant parasitic nematodes (PPN) are major constraints to food production worldwide. PPN cause annual crop yield losses of 12.3 % to global food production. This is estimated at monetary value of 157 billion U.S. dollars worldwide. At present, the most widely used method for control of PPN is the use of synthetic chemical nematicides. Nematicides although highly effective, more convenient in use and drastic in their action against nematodes, they are now being re-appraised globally due to their undesirable effect on the environment, man and biodiversity.The necessity of creating a healthy ecosystem and environment that are necessary to the survival of humans and other biodiversity on earth cannot be overemphasized. Plant material resources offer great potentials as environment friendly alternatives to synthetic chemicals. This book is about achieving a mission of reducing negative human impacts on the ecosystem and achieving environmental resource management and protection through the use of plant materials. Information contained in the book on green chemistry and conservation biology will go a long way towards achieving environmental sustainability.

Download or read book The Influence of Winter Annual Weed Control on Soybean Cyst Nematode and Summer Annual Weed Growth and Management written by Jared S. Webb and published by . This book was released on 2007 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Field studies were established to determine the effects of winter annual weed removal timing on giant ragweed and common waterhemp growth and management. A microplot study was also conducted to determine the host suitability of purple deadnettle for soybean cyst nematode under field conditions and the influence of purple deadnettle removal strategies on the nematode population. For the winter annual removal timing study, fall removal of winter annual weeds resulted in an increased density and biomass of giant ragweed. Fall removal of winter annual weeds resulted in decreased giant ragweed control at 14, 28, and 56 days after planting. Fall and spring removal of winter annual weeds resulted in an increased density and biomass of common waterhemp. For the microplot study, purple deadnettle was found to be a poor host for soybean cyst nematode under field conditions. Removal of purple deadnettle did not have an effect on the nematode population density.

Download or read book Proceedings written by and published by . This book was released on 1980 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: History of the Southern Soybean Disease Workers; Global agriculture year 2000 - a strategic analysis; Attorneys got us into this mess, attorneys must get us out; Soybeans in human nutrition; Review of plant parasitic nematode problems on soybeans; Efficacy of nematicides for nematode control; Breeding for nematode resistance; Effects of fertility on efficacy of nematicides for control; Mississippi's approach to the control of the soybean cyst nematode; Southern U:S. soybean disease loss estimate 1979; Report of Southern Soybean Disease Workers Seed Treatment Committee - 1979; Standardized foliar fungicide tests; Relationships of insects and plant diseases: soybean illustrations; Plant nutrition relation to disease development; Effect of selected weed pressures on soybean foliar fungicide performance and yield; Aerial application of fungicides to soybeans: effects of tank additives and gallonage on deposition and disease control; Epidemiology for soybean downy mildew; Mycelial development and control of Phomopsis sojae in artificially inoculated soybean stems; Nematode problem in the southeast; The alteration of nematicide activity by herbicides; Aerial blight of soybeans in Louisiana; Foliar disease control by overhead irrigation systems; Nemacur in-furrow in the mid- south; Geographic distribution, ecology, and control of sting nematodes in soybeans; Nematicide evaluation in the southeastern region - 1979; Fungicide evaluation in the southeastern region - 1979; Mid-south regional report - fungicide and nematicide; Southwest regional report - fungicide and nematicide; Industry reports on new chemicals or new uses for disease and nematode control in soybeans; Policies of the standardized regional nematicide test committee; SSDW financial status report; Southern soybean disease workers operational procedures.

Download or read book Investigating Root knot and Soybean Cyst Nematode Parasitic Interactions Through Transcriptomic Analyses of the Host and Parasite written by Ellie Walsh and published by . This book was released on 2016 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant-parasitic nematodes are a major threat to global agricultural production. Root-knot nematodes (RKN, Meloidogyne spp.) are arguably the biggest threat, capable of parasitizing virtually every crop. Soybean cyst nematode (SCN; Heterodera glycines) has a narrow host range, but is the most destructive pathogen of a particularly important crop, soybean (Glycine max). RKN’s wide host range makes crop rotation often inadequate for management, and host resistance is unavailable in many crops. Effective resistance is available against SCN however populations have adapted to the most frequently used sources of resistance. RKN and SCN both induce elaborate feeding sites. In addition to being the sole source of nutrition, the feeding sites are the primary targets of nematode secretions to manipulate host cellular functions; consequently, they are very important interfaces of the interaction. The general aim of this research was to elucidate changes in the transcriptome underlying the successful interaction between these nematodes and their hosts. Although the use of RNA interference (RNAi) to knockdown nematode genes is actively being pursued as a new strategy for nematode control, little is known about the effects of general RNAi mechanisms during parasitism. As the suppression of RNAi has been characterized in other pathosystems, I hypothesized that parasitic nematodes may also be influencing these pathways. Tanscriptomic analysis of genes associated with RNAi machinery and target genes indicates that RNAi-regulated pathways are altered during the parasitic interaction. Using a silenced reporter gene, I found the disturbance to be specific to the nematode feeding site. Furthermore, disrupting these pathways with viral suppressors of RNAi renders the host more susceptible to nematode parasitism. Transcriptomic analysis indicates that this effect extends into later stages in parasitism, making the adult female stage of particular interest for further analyses. I performed a transcriptomic analysis of adult female RKN to address the hypothesis that transcriptional patterns in this later stage of parasitism will reveal new candidate genes encoding proteins that regulate the parasitic process, such as proteins that interact with RNAi among other plant pathways. Results from RNA-Seq analysis and reverse transcriptase PCR indicate that cell wall modifiers likely continue to play an important role in the parasitic interaction. Results from transcriptomic analysis including the putative secretome have highlighted new candidates for functional analysis to determine their role in the interaction. The later stage in parasitism is similarly of interest in SCN. SCN populations are adapting to the most commonly planted host resistance available in soybean, derived from Plant Introduction (PI) 88788 and “Peking.” The resistance response in PI 88788 appears to be longer-lasting than that in Peking, which impacts nematodes’ early development. Due to my focus on the adult female stage, I chose to investigate parasitism on PI 88788. I hypothesize that transcriptional differences between females from populations avirulent and virulent on PI 88788 may play a role in their adaptation to resistance. Results from this study indicate that the expression of an effector-like gene may have been lost in virulent populations, presumably allowing them to evade host detection and subsequent defense responses.

Download or read book Improving the Management of the Soybean Cyst Nematode Heterodera Glycines Ichinohe written by Leonardo José Frinhani Noia da Rocha and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant-parasitic nematodes represent a substantial constraint on global food security by reducing the yield potential of all major crops, including soybean (Glycine max L.). The soybean cyst nematode (SCN) (Heterodera glycines I.) is widely distributed across all soybean production areas of the US, and is the major yield-limiting factor, especially in the Midwestern US. Double cropping (DC) is defined as producing more than one crop on the same parcel of land in a single growing season. Compared to conventional single annual crops, DC provides many advantages, including improving soil health, enhanced nutrient provisioning to plants, improvement of soil physical properties, control of erosion, decrease in tillage requirements, and enhanced profitability. In some double-cropping systems, soybean is planted following winter wheat (Triticum aestivum L.), and several reports suggest the potential of wheat to suppress SCN populations. Field trials were conducted from 2017 to 2018 to investigate the effect of wheat on SCN populations in double-cropping soybean. Nine fields with three levels of initial SCN populations (low, moderate, and high) were selected in Illinois. Wheat was planted in strips alternating with strips-maintained weed-free and under fallow over winter and early spring. Soybean was planted in all strips after the wheat harvest. Soybean cyst nematode egg densities were acquired at four time points: wheat establishment, post-wheat/pre-soybean, mid-soybean (R1 growth stage or beginning of flowering), and post-soybean harvest. Wheat strips reduced SCN egg densities compared with fallow strips at the R1 stage (−31.8%) and after soybean harvest (−32.7%). Field locations with noted SCN suppression were selected for a metagenomics study. The structure of fungal communities differed significantly between DC and fallow plots at soybean planting and after harvest (P

Download or read book Fungi Colonizing Cysts of Heterodera Glycines written by Lori Marie Carris and published by . This book was released on 1989 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigating Soybean Cyst Nematode Resistance written by Katelyn Butler and published by . This book was released on 2018 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean cyst nematode (SCN; Heterodera glycines) is consistently ranked as the most economically damaging pathogen of soybean, a globally important oilseed and protein crop. To manage this persistent pathogen, growers rely primarily on crop rotation and genetic resistance. For decades, Rhg1 has been the primary resistance locus deployed in most commercial soybean varieties. Resistance at Rhg1 is conferred by three types of gene products not previously known to mediate plant defense. Gene copy number variation and expression/localization differences contribute to this resistance. In the present work we demonstrate that Rhg1 can also confer resistance in potato and Arabidopsis against the cyst nematodes Globodera pallida, Globodera rostochiensis and Heterodera schactii. This supports the hypothesis that Rhg1 evolved to interfere with conserved cyst nematode infection processes. This finding suggests biotechnology-based management strategies for cyst nematodes in other crops. SCN evolution necessitates new resistance sources in soybean. The remainder of this thesis describes the identification and characterization of novel resistance genes from two independent SCN resistance QTL originating from Glycine soja accession PI 468196, cqSCN-006 and cqSCN-007. I discovered that altered regulation of a ɣ-SNAP protein encoded at cqSCN-006 confers resistance. An [alpha]-SNAP protein contributes to Rhg1-mediated resistance, underscoring the importance of SNAP proteins and their associated activity in cyst nematode pathogenesis. cqSCN-006 resistant plants exhibit differential accumulation of the ɣ-SNAP protein and expression of alternative splice forms at infection sites. Little is known about the function of ɣ-SNAPs in any system, and even less in plants. I have identified a role of ɣ-SNAPs in SCN response. I also report progress towards identifying the gene encoding resistance at G. soja QTL cqSCN-007. While no gene(s) has been confirmed to confer resistance, a RAD21-like gene is the strongest candidate. The upstream region of the resistant allele contains a large deletion and exhibits differences in gene expression. Studies of cyst nematode resistance continually expand plant defense paradigms. The work in this thesis reveals additional intricacies of this pathosystem, laying the groundwork for further exploration of soybean-SCN interaction and improved plant protection strategies.

Download or read book Effect of the Soybean Cyst Nematode Upon Soybean Production Under Different Management Systems written by E. E. Hartwig and published by . This book was released on 1982 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biology and Management of Soybean Cyst Nematode written by Donald Peter Schmitt and published by . This book was released on 2004-01-01 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Soybean Cyst Nematode written by and published by . This book was released on 1957 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: