Long (up to 6 inches), elliptical to cigar-shaped, gray-green lesions that eventually become tan-brown are symptomatic of infection by this fungus. The disease generally only causes limited damage, but it may lead to crop loss under certain conditions. 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 is an infection caused by a fungus that is fairly common in the Midwest, wherever corn is grown. 2/24/2020, Pioneer® Brand Corn and Soybean Product Performance Drives Long-term Business Ad, Pioneer, Peterson Farm Brothers Team Up to Benefit the National FFA Organization, Pioneer Launches New Mobile Tool to Identify Pests, Diseases and Deficiencies, New Pioneer Seeds App Functionality Improves Customer Collaboration, Granular Launches Free Tool to Help Farmers Measure Field-Level Profitability. Technical Get the latest news, events and insights from Pioneer. Management. Northern corn leaf blight is caused by another fungus that overwinters in infested crop debris. Revised: June 2015 Grey-green, elliptical disease lesions begin to develop 1 to 2 weeks after infection (Figure 1). Northern leaf blight is found in areas with a humid climate. 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. The disease has appeared annually in Indiana, and has increased in prevalence since the mid- … Granular, the world’s leading farm management software platform, announces Granular® Insights™, an easy to use, free digital tool that delivers a clearer view of field-level profitability with close to zero effort. Northern corn leaf blight (NCLB), caused by the fungus Exserohilum turcicum, is an increasingly important disease in the U.S. Corn Belt. Although there are several races of the fungus that cause disease, Race 3 most likely causes the greatest impact in New York State. Northern Corn Leaf Blight Angela Madeiras, UMass Extension Plant Diagnostic Laboratory At the turn of the 20th century, northern corn leaf blight (NCLB) was a common problem for corn growers in New England. Infection begins first on lower leaves and moves up the plant. Northern corn leaf blight of corn. ™ ® Trademarks of Corteva Agriscience and its affiliated companies. The characteristic symptom of northern corn leaf blight on a susceptible hybrid is one-to-six inch long cigar-shaped gray- to tan-colored lesions on the leaves (Fig. This transfer of resistance is able to be accomplished using standard plant breeding methods. The latest update to the Pioneer Seeds app takes those services to the next level. They eventually turn tan colored and may contain dark areas of fungal sporulation. Both Northern and Southern corn leaf blight can cause serious damages to corn. Northern Corn Leaf Blight Pioneer on-farm trials were conducted at 40 locations in Iowa in 2015 to evaluate corn yield response to foliar fungicides applied at different timings. It spreads up through the Corn Belt riding hurricane winds, which can quickly carry the organism from south to north. The distinct cigar-shaped lesions are generally unrestricted by leaf veins making Northern Leaf Blight (NLB) one of the easiest diseases to identify. Late infections may have less of an impact on yield. According to DuPont Pioneer experts, wet conditions experienced in corn-growing areas this year … With warmer spring and summer temperatures, fungus spores reproduce on crop residue and are spread by wind or the action of rain splashing onto the new corn crop. Good northern corn leaf blight resistance. www.btny.purdue.edu. Skip navigation ... Corn Diseases: Northern Corn Leaf Blight - Duration: 2:16. Greg, Nathan and Kendal Peterson run a successful farming operation together near Assaria, Kan. Find your local representative by clicking on your region below. 3. Before planting: Choose hybrid varieties with known resistance to maize northern leaf blight; this is the most important way of managing the disease. Prior to 1930, virtually all corn produced in the world utilized open-pollinated cultivars with nearly 1000 different cultivars being grown in the United States alone Southern Corn Leaf Blight: A Story Worth Retelling H. Arnold Bruns* Published in Agron. Kacey Birchmier Cover the jug with a silicon plug, then soak the grains for overnight. Expires: June 2018. Corn leaf infected with southern rust. Unfortunately there are the occasions where disease is wind blown and infects silage crops grown on “fresh ground”. Corteva Agriscience™ Northern Corn Leaf Blight in Northern New York By Amanda Bond, K. O’Neil, M. Hunter and G. Bergstrom Symptoms of northern corn leaf blight (NCLB) are seen across New York State and Northern New York, as well as the US Corn Belt, each season. Northern Corn Leaf Blight. Outbreaks of this disease are normally associated with the northern areas of the North Island and in areas where maize crops are grown in the same ground year after year for grain harvest. Therefore, this will deprive the plants of the nutrients that it needs. 11/18/2020, Press Release Farmers have always chosen Pioneer for agronomic expertise, local service and industry-leading products. With 2020 harvest results rolling in, Pioneer® brand corn and soybean products are winning the majority of competitive on-farm trials. As the disease develops, the lesions spread to all leafy structures, including the husks, and produce dark gray spores, giving lesions as dir… The information in this publication is general in nature only. Northern Corn Leaf Blight Management and Control Methods. 9/29/2020, Press Release However, before lesions are fully developed, they first appear as small light-green to grayish spots approximately 1-2 weeks after infection. Gray Leaf Spot and Northern Corn Leaf Blight share some similarities, but it's important to accurately diagnose which disease is affecting your corn crop. The lesions are initially bordered by gray-green margins. Pioneer® brand products are provided subject to the terms and conditions of purchasing, which are part of the labeling and purchase documents. Suitability rating based on field observations and a weighted calculation of gray leaf spot, stress emergence, anthracnose stalk rot, northern corn leaf blight, and Diplodia ear rot scores. © 2020 Corteva. 80). • However, in severe NLB outbreak years with high spore loads, infections may begin in the upper plant canopy. In conditions where NLB risk is high, growers should consider planting hybrids with at least moderate resistance ratings of 5 or higher for NLB. Severity of symptoms varies widely, from insignificant to devastating, for some fields in some years. Thresholds None established. Few fungicides are registered for the control of this disease in New Zealand. Northern Corn Leaf Blight Pioneer Agronomy Sciences ®, TM, SM Trademarks and service marks of Pioneer Hi -Bred.© 2010, PHII Disease Facts •Caused by Exserohilum turcicum (previously classified as Helminthosporium turcicum), a fungus found in humid climates wherever corn is grown. Crops planted late to susceptible hybrids in seasons with favourable weather conditions, for NLB development, may benefit from the application of fungicides. Warm, humid conditions favor NCLB. 6/22/2020, Press Release 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. In New Zealand, NLB infection may occur from early December onwards. Large elliptical-shaped lesions on corn leaves herald this fungal disease. It overwinters as mycelia and conidia in diseased maize leaves, husks and other plant parts. ... Pioneer® brand products are provided subject to the terms and conditions of purchase which are part of the labeling and purchase documents. 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. 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. Early post harvest shredding and incorporation of plant stubble will go a long way to reducing the numbers of viable spores carried over from one season to the next. The damages will not only be cosmetic in nature, but can also be economic. DuPont Pioneer experts in southern Minnesota discuss what to look for and management options in this Pioneer® GrowingPoint® agronomy update. In conditions where NLB risk is high, growers should consider planting hybrids with at least moderate resistance ratings of 5 or higher for NLB. Leaf lesions are long (1 to 6 inches) and elliptical, gray-green at first but then turn pale gray or tan. Developing crop leaf tissue remaining wet for continuous periods exceeding 12 hours, together with temperatures in the range of 18 to 27◦C, favour spores being able to “take root” and establish an “infection site” on maize leaf tissue. The earlier lesions develop, the more leaf area is reduced and the more damage results. Note round to oval pustules, light brown to orange in color. Northern corn leaf blight is found mostly during warm, wet periods during the growing season, at the time of silking or after. Infections by NLB can occur at any growth stage during the season, but plants are more susceptible to infection after flowering. Photos by Kiersten Wise and Greg Shaner. Spores are produced on this crop residue when environmental conditions become favourable in the spring and early summer. Northern Corn Leaf Blight (NCLB), caused by the fungus Exserohilum turcicum (previously classified as Helminthosporium turcicum), is becoming an increasingly important foliar disease of corn in the Philippines, particularly in areas with high humidity (due to heavy dew or frequent rain showers) and moderate temperatures (20-28 degrees Celsius). When managing northern corn leaf blight, choose corn hybrids that are somewhat resistant to this fungus. Secondary infection readily occurs from plant to plant, and even from field to field as spores are carried long distances by the wind. Recommended withholding periods to expire prior to tasselling offers the opportunity to grow and perform to a standard... 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