northern leaf blight of maize

Northern leaf blight caused by Exserohilum turcicum (Pass.) Lesions begin on the lower leaves and then spread to upper leaves. RESISTANT VARIETIESThere are resistant hybrid varieties to this disease; check those available from retailers in your country. Symptoms occur first on the lower leaves, except when plants become infected by large numbers of spores from the atmosphere. AUTHOR Grahame JacksonInformation from CABI (2012) Setosphaeria turcica (maize leaf blight) Crop Protection Compendium (http://www.cabi.org.cpc/). Northern Corn Leaf Blight (NCLB) is a fungal disease and it is a stumbling block in maize production. mays) known in many countries as corn or mielie/mealie, is a grain domesticated by indigenous peoples in Mesoamerica in prehistoric time The leafy stalk produces ears which contain seeds called kernels.Though technically a grain, maize kernels are used in cooking as a vegetable or starch. Quantitative resistance to plant pathogens, controlled by multiple loci of small effect, is important for food production, food security, and food safety but is poorly understood. Android Edition Leach CM; Fullerton RA; Young K, 1977b. & Jain diurnal periodicity in spore release trapped at night and a (perfect stage Trichometasphaeria turcica Luttrell), maximum at … Northern leaf blight of maize in New Zealand: release and dispersal of conidia of Drechslera turcica. Repeat applications may be required if weather conditions favour continuing infection. Infections by NLB can occur at any growth stage during the season, but plants are more susceptible to infection after flowering. Application proves effective by applying an early protectant shield of fungicide to all surfaces of the plant to avoid further infection (lesions) occurring. caused the greatest effect on reducing the severity of northern leaf blight. The length or size of lesions may vary with in different corn hybrids reactions with different resistance genes. Early detection of crop infection offers the opportunity to undertake a preventative fungicide programme when conditions favour the disease. Infections generally begin on lower leaves first and then progress up the plant. Northern leaf blight is a foliar disease of maize caused by Exserhilum turcicum, the residue- borne fungus. Before planting: Choose hybrid varieties with known resistance to maize northern leaf blight; this is the most important way of managing the disease. Pioneer (https://www.pioneer.com/home/site/us/agronomy/library/managing-nclb/). Insight 339, Exserohilum turcicum (previously called Helminthosporium turcicum). These spores are spread by rain splash and air currents to the leaves of new crop plants, where primary infections are produced. As a result it is important, in areas with a history of NLB incidence, that hybrids with high levels of resistance are selected for late season plantings. Application of chemical is normally required prior to tasselling. Northern corn leaf blight (NCLB) also known as Turcicum leaf blight of maize is major foliar disease and it’s a problematic to maize farmers in highland of Himalayan region, worldwide. Disease cycle of maize northern leaf blight (NLB). Northern corn leaf blight, caused by the fungus Exserohilum turcium, typically occurs in wet and humid conditions. The Pioneer® brand maize hybrid product catalogue provides a list of plant characteristics and disease ratings for each hybrid, including NLB. Spots caused by maize northern leaf blight are larger, and fewer than spots caused by southern leaf blight, and they are mostly on the leaves (see Fact Sheet no. However, this requires the identification and use of stable resistance Leaves dry out and die. Fungicides do not kill the spores. Introduction. Leonard and Suggs inflict significant yield losses in the humid tropical regions. Background: Northern corn leaf blight (NCLB) caused by Exserohilum turcicum is a destructive disease in maize. White blast Crown stalk rot Stripe Setosphaeria turcica. Interactive tools that will assist you in making decisions to help you achieve the most out of your investment. Northern corn leaf blight (NCLB) is most devastating maize foliar disease in Himalayan region of the world, caused by fungus Exerohillum turcicum. Helminthosporium turcicum. Near-isogenic lines (NILs) are a powerful genetic tool to dissect quantitative trait loci (QTL). The following agronomic principles should be applied to all maize crops in order to place the crop in  “optimum” conditions for the production of high yielding crops free of “stress”; Plant breeders have been able to identify specific genes that offer increased resistance when bred into plant lines. asexual stage name is Exserohilum turcicum. Deployment of resistant cultivars is an effective way to control NCLB. Spread is by rain splash and wind. Northern corn leaf blight (NCLB), caused by the fungus Exserohilum turcicum, is an increasingly important disease in the U.S. Corn Belt. Northern corn leaf blight (NCLB) is a prevalent foliar disease in maize. However, this requires the identification and use of stable resistance genes that are effective across different environments. Technical In this study, 207 recombinant inbred lines derived from a K22 × By815 cross were planted in Yangling, China, in 2012 and 2013. Turcicum or northern corn leaf blight (NCLB) incited by the ascomycete Setosphaeria turcica, anamorph Exserohilum turcicum, is a ubiquitous foliar disease of maize. The objectives of this study were to determine the leaf blight response of 50 elite maize inbred lines developed for the mid-altitude, sub-humid tropics and to select promising parents for resistance breeding. Leonard and Suggs (syn. The earlier lesions develop, the more leaf area is reduced and the more damage results. In moist weather, brown fungal growth containing spores occurs on the spots, often in concentric zones. Look for the long grey tapering leaf spots, more than 100 mm long. Northern corn leaf blight. Regular checking of crops in the December/January period will enable early detection of the disease. There are different races. Make sure that the plants have adequate nutrients. The present investigations were carried out to screen the 30 maize genotypes against NCLB under agro-climatic … Northern leaf blight of maize (Zea mays L.) caused by crop in Nebraska, Meredith (14) observed a regular the fungus Drechslera turcica (Pass.) This increased risk results from the presence of high spore volumes from earlier planted crops which serve as a reservoir of spores. Northern corn leaf blight (NCLB), a severe fungal disease causing yield losses worldwide, is most effectively controlled by resistant varieties. Maize for Silage Growing and Harvesting Costs Calculator, Maize for Silage Hybrid Performance Information, Maize for Grain Hybrid Performance Information, More Research, More Product Choices, More Grower Profit, The Complete Guide to Harvesting Maize Silage, How To Make Quality Pasture Cereal and Lucerne Silage Guide. Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community. In conditions where NLB risk is high, growers should consider planting hybrids with at least moderate resistance ratings of 5 or higher for NLB. Photo 2. The disease causes the leaves to dry out, wither and die. © 2020, Genetic Technologies Limited. It is important to use fungicides that are registered for the control of NLB in New Zealand and to follow carefully the conditions on the label. Use our online selectors to find the best hybrid for your location. Spots caused by maize northern leaf blight are larger, and fewer than spots caused by southern leaf blight, and they are mostly on the leaves (see Fact Sheet no. Practise crop rotation; rotate with non-grass crops. As many lesions enlarge and coalesce, entire leaves or leaf areas may be covered (Figure 3). Unfortunately there are the occasions where disease is wind blown and infects silage crops grown on “fresh ground”. Northern corn leaf blight (NCLB) is caused by the fungus Setosphaeria turcica.Symptoms usually appear first on the lower leaves. It has also been known as            Revised: June 2015 Grey-green, elliptical disease lesions begin to develop 1 to 2 weeks after infection (Figure 1). NLB is not normally considered a problem for silage maize crops as the main period of leaf tissue damage caused by the disease generally occurs after the timing of silage harvest but prior to grain harvest. Few fungicides are registered for the control of this disease in New Zealand. 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