Table 2. Fungicide product prices, application costs, and corn prices were used to calculate probability of a break-even return on investment (ROI) for each fungicide class and application timing. timing of fungicide application on TDB, one in Illinois (2010) and the other in Kansas (2015). Fungicide Efficacy for Control of Corn Diseases - January 2021 Management of Corn Diseases This fungicide efficacy chart was adapted for Indiana from information developed by . However, fungicide efficacy is often largely controlled by fungicide timing. Fungicide timing trial results from 2021: Yield and relative area under the disease progress curve (a . The easiest way to do it may not be the most effective, according to recent research. Apply too early, and your corn can be left vulnerable to disease late in the season, impacting your yields. Fungicide Timing: Corn & Soybean. If the growing year is much like 2020, with little disease development, you likely can wait until after R1 and more toward your brown silk timing. Always read and follow label instructions for all pesticide applications. Average yield reported across all eight locations with yield reported. Cob diseases are best targetted at silking. The best time to apply is once tassels appear, but before the silk turns brown. Feed need, timing determines value of silage corn fungicides Spraying fungicides on corn can help keep the leaves cleaner. Proper coverage is also important when preventing blight. Fungicide Efficacy for Control of Corn Diseases [PDF] This publication was developed by the Crop Protection Network, a multi-state and international collaboration of university/provincial extension specialists and public/ private professionals that provides unbiased, research-based information to farmers and agricultural personnel. Southern rust is one foliar corn disease that might require later timing of a corn fungicide application. Trial treatments including corn products of varying relative maturity (RM), fungicide rates, and application timing. By Jennifer Glenney Reporter . The right timing can depend on several fact. Learn how different factors affect fungicide timing and what the biggest application mistakes are for corn. Fungicides are often used to protect corn from disease and help producers reach higher yield potential, but there are multiple timings that the fungicide can be applied. Corn should be scouted regularly to monitor for the development and spread of this and other diseases prior to fungicide applications. Extensive Pioneer research conducted over the last several years has demonstrated that the value of fungicide applications in corn depends on disease pressure, hybrid susceptibility, and management factors such as previous crop and tillage. The V4 to V7 window is growing in popularity because you can treat the corn with your ground rig and likely just add the fungicide in with your herbicide spray. The results presented in this paper are from these two fungicide-timing studies that became When factors warrant a fungicide application, the application timing that has provided the most consistent yield response over non-treated corn is a fungicide application at VT or R1 growth stages (tasseling to pollination). The timing of these applications play a major role on their effectiveness. Review the key findings of several foliar fungicide research projects conducted between 2007 and 2018. Effective application of fungicide is all about timing and coverage. Table 2. Timing is crucial when it comes to applying fungicides to your corn crop. In our fungicide timing trials applications made at VT/R1 (tassel /silk) did a good job controlling tar spot, but we did see that once the fungicide ran out of steam (3-week window) tar . Products used and application timings tested Six products at various application timings were evaluated (Table 1). We recommend beginning applications once 75-80 percent of tassels are visible. Why it matters: Correct fungicide timing is one of the most important disease management decisions - aside from choosing the fungicide itself - for farmers trying to manage disease in their corn crop. Fungicide treatments were the whole plot, and corn products were the sub-plot. oz/A applied at VT/R1. The authors have observed TDB in only 2 of 8 corn fungicide studies. Based on our 2019 research, to minimize the impact of tar spot on crop yield we need to be protecting the ear leaf and above until the corn reaches black layer. Labels & sds. Therefore, an additional application may be necessary at a later growth stage to control other fungal pathogens. . Figure 5. When producers want to focus on the leaf disease, tassel timing is ideal. . Seeding Rate. Fungicide timing is critical in tar spot management. Corn. The research studies were located at Volga and Southeast . The best time to start scouting is immediately prior to tasseling. Back to all tour stops Go to next tour stop Looking ahead to this year's corn crop and wondering how you'll handle fungicide applications? The study was setup in a split-plot design with four replications. Fungicide Efficacy Table The Corn Disease Working Group (CDWG) has developed ratings for how well fungicides control major corn diseases in the United States. Timing your foliar fungicide applications is critical for getting the best value and response. Results from the 2020 tar spot spray timing strip trial, which included eight locations and tested fungicide application timing on early and mid-relative maturity and susceptible* and less susceptible* corn products. Figure 5. revxfield.com. With recent rainfalls, subsoil moisture has been replenished and the crop has jumped in the last few days. Current research is investigating benefit from later application around R3 (milk stage). . You may need to spray as early as V7 or V8 for physoderma. Season 9: Episode 5 - Fungicide Timing in Corn Miravis Neo fungicide helps deliver more bushels more often. Fungicide treatments did not have a large effect on . In addition to timing, the key to an effective fungicide application is getting good coverage. In a wet year, you may need to apply a fungicide near R1 regarding grey leaf spot or northern corn leaf blight. Look for disease development on the lower leaves of the corn plant up to and including the ear leaf. Fungicide timing. Great looking acres and strong corn prices both weigh into the decision to apply fungicides. Foliar fungicides applied during R1 provide better protection against corn diseases. We have seen the best results when spraying at V6 or V7. OTHER CHOICES: Trivapro While this has been a good three-mode-of-action product, it contains the actives found in Quadris and Tilt, along with an SDHI. . corn on corn) tar spot fungicide timing trial. Veltyma fungicide is the swift, simple and secure solution for corn growers looking for great fields and bottom lines. More information is available at Tarspotter, the Corn Tar Spot Disease Forecaster. "Once you have brown silk, it might be a little late," Flansburg said. Furthermore, a mixed-mode-of-action fungicide product is often more effective than a single-mode-of . Published: August 11, 2020 . A fungicide application at R1 corn growth stage at either location provided the greatest yield increase (Tables 1 and 2). The timing of the first fungicide application and deciding whether or not to apply a second application requires gathering some information about the disease. Remember, it is the ear leaf and leaves above that contribute 75 to 90 percent of the carbohydrates to grain fill. The 2019 growing season was characterized by late planting due to waterlogging conditions in our fields, a scenario that most growers faced in SD. You've arrived at Highland, IL Corn Fungicide Timing Syngenta Agronomy Service Representative Matt Geiger discusses the importance of fungicide selection and application timing in corn. (seeds/acre) 36,000. See how Miravis Neo corn fungicide outperformed Delaro 325 SC and Veltyma in yield and potential revenue during trials conducted in multiple states. Many products have use restrictions, and the . Average yield advantage of susceptible and less susceptible corn products at different fungicide timings over the untreated check in Colon, MI (2021). Fungicides. Diseases like Southern rust, gray leaf spot and Northern corn leaf blight can severely limit yield, but a well-timed fungicide application helps keep them under control, allowing corn to focus on its job of producing high yields. When factors warrant a fungicide application, the application timing that has provided the most consistent yield response over non-treated corn is a fungicide application at VT or R1 growth stages (tasseling to pollination). . IA, IL, IN, KS, MN, MO, NE, OH, SD, WI; 2018-2020. . . Despite its name, the disease is not limited to the south, and is favored by high humidity and 80-degree temperatures. . RESEARCH SITE DETAILS Table 1. Fungicide Timing in Corn Joel and Kyle Share Tweet On this episode of The Deal With Yield, hosts Joel and Kyle discuss steps farmers can take to stay ahead of disease issues in corn. Fungicide applications at tasseling (VT) and later were effective in reducing the . With its combination of faster curative activity, easier application and longer residual, this is the fungicide corn growers can turn to with confidence when they need to be sure their fungicide performs. Photo by Kiersten Wise. 1 Fungicide application timing is extremely important and needs to be made near the onset of the tar spot symptoms. This is because the largest yield reduction occurs during this stage when corn is under stress. Corn There are two post-emerge timings being widely used in the industry. Reading Time: 2 minutes. The easiest way to apply fungicide in most situations, says University of Kentucky Extension plant pathologist Paul Vincelli, is to tank-mix with herbicide between V4 and V8 growth stages. Most fungicide manufacturers will say that the best time is between VT and R3, pathologists will say at economic threshold, and others may just recommend applications based on visual cues like tassel or brown silk. Recommended fungicide application timing on corn is VT (tasseling) to R2 (blister or brown silk). A fungicide application at R1 corn growth stage at either location provided the greatest yield increase (Tables 1 and 2). Timing for white mold or sclerotinia stem rot requires different timing as infection first occurs at R1 or the initiation of flowering. SUMMARY. Trials conducted 1n west~rn New York have shown that three applications of mancozeb applied by air significantly reduced disease severit~ o~ ~II the l~aves of sweet corn plants. And, accurate diagnosis is critical, as other diseases, such as Goss's bacterial wilt and blight and Holcus bacterial leaf spot, are present and cannot be managed with fungicides. Thus, these are the leaves we need to protect. In this Corn School episode, Bernard Tobin is joined by BASF agronomist Ken Currah to discuss fungicide strategies to protect . He walks through a trial demonstrating differences between Trivapro fungicide and another product on the market. Should you plan for multiple applications or do you even need . Some products allow for an earlier application of pre-tassel, but the VT to R2 window has shown the most consistent control of mid to late season foliar diseases. In this video, Pioneer Field Agronomist Rodney Erdman discusses the optimal time to apply fungicide to your corn. Results from experiments conducted in Iowa by plant pathologist Alison Robertson and team in 2016 and 2017, showed an average reduction in lodging of 9.3% and increase in corn yield of 4.1 bushels/acre when fungicide was applied at R1. Veltyma is the most expensive fungicide in corn today at $21 per acre, but with the corn price up, it should still pay in most situations. A product's efficacy may be influenced on application timing, rate, application method, and the level of disease severity in a field. Apply too late, and your corn can be equally susceptible to disease. Application rate and timing: Miravis Neo 13.7 fl. Our objectives were 1) assess the effect of timing of application of fungicides on disease, 2) evaluate the yield response of hybrid corn to foliar fungicide application, and 3) discern differences, if any, between fungicide products. Major corn diseases are favored by humid conditions, so the edges of fields will not be the place to scout. Average yield advantage of susceptible and less susceptible corn products at different fungicide timings over the untreated check in Colon, MI (2021). The corn field trials aimed at evaluating commercially available and new foliar fungicide products to manage various corn diseases. If the disease is present in the field or locally (e.g. Corn ear diseases are of much greater concern after a high disease year in 2018. A base fertilizer application of 25 lb . Fungicide applications also significantly mcreased the Table 1. The goal of this trial was to look at the yield impact of one or multiple applications Delaro Complete Fungicide on three corn products. Fungicides can be an effective tool in fighting against yield losses caused by fungal pathogens. Across the U.S. and Ontario, Canada, ground application fees ranged from $3.00 to $8.50 per acre, while aerial application fees ranged from $6.50 to $12.00 . Modest control of rust on sweet cor~ can be achieved with applications of fungicides. Efficacy ratings based on limited site locations . A single well-timed application can offer protection similar to two applications. There is tremendous yield potential in Ontario corn fields right now. corn on corn) tar spot fungicide timing trial. Currently in Nebraska, we've reported southern rust development at a very low level in southeast Nebraska. In most instances, a fungicide application between the VT growth stage (tassel emergence) and R2 growth stage (blister) is the most effective for controlling tar spot. neighboring county) and environmental conditions are conducive for disease development, a fungicide spray has a high probability of .