• On non-treated trees severity declined with tree height in all seasons 25 • Fungicide treatment has a significant effect reducing scab in the low-mid canopy (≤35 ft) • Above 40 ft, there was no significant effect of fungicide on scab severity 30 Treatment <15.0 ft Tree height Vertical distribution of scab in the pecan canopy 15-25 ft Compare. Enable 2F also gives excellent control of secondary diseases, including downy spot, leaf scorch, powdery mildew, vein spot, leaf blotch and gnomonia leaf spot. Pecan Scab. Revised 02-06-03 2 For diseases on pecan trees, begin spraying Benlate for control of scab. We suggest Fruit Tree and Plant Guard Concentrate? Spray at once if excessive nut drop results from pecan weevil feeding punctures before pecan shells begin to harden. The fungicide groups with recommended products labeled for pecan that have the highest tendency for resistance include Group 3 (DMIs) and Group 11 (Strobilurins). Disease control includes the use of cultivars without extreme susceptibility to the diseases, the use of cultural practices such as adequate spacing between trees, and conscientious application of fungicides. The Best Fungicide for Fruit Trees. Triadimefon. Neem Oil Fungicide, Miticide and Insecticide Concentrate Model# 024 $ 19 62 $ 19 62. Pecan scab is rightfully considered the most important pecan disease in the world, because of its ability to cause severe crop loss as well as defoliation. Fungicides Approved for Use on Pecans and Diseases They Are Reported to Control. Dr. Brenneman’s work has demonstrated very good results on nut scab with as much as 98%-100% reduction under heavy pressure situations. Phosphites make a great leaf scab material and can be used alone at the 2 qt rate. Spraying Pecan Trees. If not blown over, pecan trees were leaned, wrenched around from the winds, and endured root breakage in addition to broken limbs. 5. Mix with a gallon of water and a dash of mild soap. Bonide 16 oz. Free delivery. Without fungicide applications, certain cultivars would experience yield losses ranging from 50 to 100 percent, depending on the year. Pecan trees are increasingly being grown commercially and in home yards for nuts or shade. UGA Extension Horticulturalist Dr. Lenny Wells says trees in the first few years need to be sprayed but not on a … A list of recommended fungicides, all of which are effective, can be found in the LSU AgCenter Fungicide Application Recommendations for Pecan Disease Control. What is pecan scab? Applications made after infections have occurred will help reduce the occurrence of further infections but will not eliminate disease that is already present. I will send out a quick blog post to provide the link for those if you need them. Also similar to myclobutanil is fenarimol, a systemic fungicide that controls powdery mildew and scab on apple and pear trees. Fungicides are grouped by their mode of activity against fungi. Pest & Disease Control for Pecan Trees. Powdery Mildew. The Best Fungicide for Fruit Trees. The important thing to remember is to rotate chemistries and use the fungicides to their strengths. Category: Fertilizers & Soil Care. Pecans have been grown for commercial production in Missouri for more than 75 years. Baton Rouge, LA 70803. Free delivery. Revised 02-06-03 2 For diseases on pecan trees, begin spraying Benlate for control of scab. On average, you must spray about 12 times every growing season. Pecan Scab, a disease cased by the fungal pathogen Fusicladium effusum, can drastically reduce nut yield. A preventive fungicide spray program is very effective to prevent scab on pecans. Once a pathogen becomes resistant to a specific fungicide it will be resistant to all of the products in that fungicide group. Trees known to have a recent history of weevil problems should be selected for monitoring. I don't know the type of pecan but bought it at a nursery. Botryosphaeria is wood rotting organism that can be problematic behind these practices. Bonide Captan Fungicide is not specifically labeled for pecan scab. Unfortunately as many of you know we have had to cancel our last four county meetings of the year (Wilcox, Jenkins, Brooks, and Dougherty) as well as the Georgia Pecan Growers Assoc. Pecan scab is a fungal disease that attacks the pecan tree with fungal material called stroma. Other common diseases are downy spot, powdery mildew, shuck dieback, stem-end blight, and bacterial leaf scorch. Add to cart. The first spray for scab control should be in early April at the prepollination stage. It does not occur on shoots or nuts. Share. Pecan trees (Carya illinoensis) are widely grown in South Carolina mainly for both their tasty edible nuts and shade. Hypothetically, the chances of resistance selection are reduced when the number of fungicide groups used in a group rotation schedule increases. A proper and consistent spray schedule is important to the survival of your trees. 4. This fungicide combines difenoconazole (a group 3) and pydiflumetofen (group 7), the latter of which is a new chemistry for pecans, which should strengthen our resistance management programs. Pecan Scab Control. Elast/Tin. Pecan trees grow in many settings, including woodlands, parks, urban greenbelts, courthouse lawns, and thousands of home landscapes. Scab can be damaging over a 120- to 150-day period beginning as soon as the trees break dormancy in the spring. What fungicide is best to use for control of pecan scab. Basic flowering timing follows one of two patterns. Broad Spectrum Landscape & Garden Fungicide . We have lots of newer planted trees in the county, here are some being sprayed last week. Absolute. But it is only effective if you begin fungicide applications when leaf buds are opening. Phosphite–2 qt/acre rate* 3. Table 2. Young Trees. The fungicide groups with recommended products labeled for pecan that have the highest tendency for resistance include Group 3 (DMIs) and Group 11 (Strobilurins). Phosphite) move into the tops of trees from the lower Thompson On Cotton: Seeing A Trend Toward 80 Cents? The … Mid-season (mid-late June): Six weeks after the last sprays, re-apply Bonide Fruit Tree Spray. Type II (protogynous) cultivars have stigmas that become receptive first and the pollen is shed after the flowers have been fertilized. Commercial pecan growers routinely treat their orchards with fungicides that effectively control scab. It’s easier than figuring out how to treat pecan scab. Again, there are many such programs that one could put together. Overview Variety of causal agents Diseases affecting pecans are caused by bacteria, fungi, nematodes, mycoplasm, and physiological problems. Because of the cost of fungicides, pecan scab also prevents small orchards and yard trees from producing high quality nuts. Because scab disease can occur any time during the growing season it is necessary to make several preventative fungicide applications from spring through summer. Proper care of your pecan trees is the best way to prevent attacks such as this and from other fungus and disease. Trees known to have a recent history of weevil problems should be selected for monitoring. Effective and safe fungicide treatments are easy to make at home and can save you a lot of money. web@agcenter.lsu.edu, 106 Martin D. Woodin Hall The most damaging fungal disease in the Central and East regions is pecan scab (Fig. This fungicide was commonly used on pecans in the 1920s but was eventually supplanted in commercial pecan orchards by modern fungicides. Instead, your best strategy is to plant disease resistant varieties, such as Cape Fear, Desirable, Elliott and Chickasaw. Fire Blight Spray . Usually this time of year, as bud break is nearing (I began to see budbreak on Cape Fear last week), I send out an example fungicide program. 8. Pecan scab control and fungicide coverage from ground-based sprayers Clive H. Bock, Mike W. Hotchkiss, Ted E. Cottrell, and Bruce W. Wood USDA-ARS-SEFTNRL, 21 Dunbar Rd., Byron, GA 31008 . April 6, 2018 By Lenny Wells, University of Georgia Pecan Specialist. It is one of many great products we carry for scab on pecan trees and should do a great job for you when used as directed on the product label. I have been using an off the shelve product (Ferti-lome liquid systemic fungicide II - 1-55% Propicanzole). Organic growers may spray trees with the Bordeaux mixture (copper sulfate and hydrated lime). Emergence should be monitored in each infested grove with traps, knockdown sprays or a combination of these methods. To control pecan scab on susceptible varieties, spray a fungicide on foliage and the developing nuts multiple times during spring and summer, depending on the frequency of rainfall. For organic control, spray the affected trees with copper fungicide at two week intervals until the conditions subside. Teviotdale, Beth L., Themistocles John. Not much has changed from … . 225-578-4161 Hi-Yield® zinc sulfate is critical in growing pecan trees. The important thing to remember is to rotate chemistries and use the fungicides to their strengths. A list of fungicides recommended for pecan scab disease control is included at the end of this article. Zinc Sulfate will prev ent rosetting in pecans along with keeping the leaves pretty and green. This fungicide combines difenoconazole (a group 3) and pydiflumetofen (group 7), the latter of which is a new chemistry for pecans, which should strengthen our resistance management programs. Kphite 7LP is the best choice for all. From diseases to pests, many potential issues can be prevented with spraying before they even begin! Set your store to see local availability Add to Cart. Pecan tree stems, buds and leaves coated in white powder are suffering from a powdery mildew outbreak. A rampant fungal infection can keep you from enjoying fruit off your tree when harvest time arrives, and it can sometimes kill the tree. Description; Product Description. Keep trees healthy, providing good drainage and apply appropriate fungicide … Miravis Top is a superb new material that provides an additional chemistry to throw in the mix and should be focused on nut scab. F-Stop Fungicide Granules . Safer Brand 32 oz. Fung-onil Fungicide Concentrate Model# 880 $ 20 70 $ 20 70. Phosphites make a great leaf scab material and can be used alone at the 2 qt rate. Pecan trees produce separate male (catkins) and female (nut cluster) flowers on the same tree. Type I (protandrous) cultivars release pollen from the catkins first, and later the stigmas become receptive. Every tree has the future potential for disease and insect damage. F-Stop Lawn & Garden Fungicide . In the right temperatures, stroma is infested with fungal spores that, in turn, spread over the tree, causing infection. It is probably best not to use these groups when there is a lot of scab disease already present on the trees, because higher pathogen populations increase the odds for resistance selection. Apply in early spring to prevent a disappointing crop. Spray at once if excessive nut drop results from pecan weevil feeding punctures before pecan shells begin to harden. Scab is a fungus which invades the young rapidly growing shoots and leaves and later the developing nuts. Lineup – DTN, North Carolina Cotton: 2020 On-Farm Variety Trial Results, DTN Cotton Close: Market Settles Fractionally Higher, Illinois Corn, Soybeans: Reduce Disease Risk with Hybrid/Cultivar Selection, Want To Quit Farming? To protect your pecan trees against galls, water and fertilize them regularly. Absolute. Fungicide Application Recommendations for Pecan Disease Control. Share 101. Control of pecan scab disease depends primarily on protection of tender leaf, nut, and shoot surfaces with application of an effective fungicide. Emergence should be monitored in each infested grove with traps, knockdown sprays or a combination of these methods. 1 Pint Liquid Concentrate (treats at least 5-6 large trees) Liquid Copper Fungicide Spray is a key tool in disease prevention and treatment on a large variety of trees. 6. For more information. It also lasts with 14-day residual control of leaf scab and 21-day protection against nut scab. Hi-Yield Zinc Sulfate For Pecans. Even some organic sprays contain harsh chemicals. F-Stop Lawn & Garden Fungicide RTS . The responsible fungus is most active in warm, humid conditions with temperatures between 60° and 80°F (15.5 to 26.6°C). We suggest Fruit Tree and Plant Guard Concentrate? Captan 50W Fungicide . 2. If they are not pretty and green, chances are the tree is lacking Zinc. NOTE: This is part 9 in a series of 11 articles. Crown Gall. Neem Concentrate . Fungicides applied in the course of the regular scab spray program will control powdery mildew. Crown gall is caused by the bacterial pathogen Agrobacterium tumefaciens. Fungicide Schedule Example follows: Moderately susceptible cultivars or those under less scab pressure. Set your store to see local availability Add to Cart. Tips For Cushioning Tax Obligations – DTN, Arkansas: Winter County Production Meetings Move Online, Crop Insurance: Breaking Down The Enhanced Coverage Option, Ag’s Role In Climate Change: Small Steps Taken, California Almonds: Determining Honeybee Hive Needs – 6 Factors, North Carolina: Cinara Aphid – Early Christmas Visitors, DTN Retail Fertilizer Trends: Market Movements Remain Erratice, Texas: 3 Counties Designated Natural Disaster Areas to Drought, Texas: Cattle Producers Face Decisions as Drought Intensifies, https://site.extension.uga.edu/pecan/2020/03/example-fungicide-program-for-2020/, New Head of Rabo AgriFinance, Ag Lending Veteran Shawn Smeins, Rice: Horizon Ag Rolls Out Two New Clearfield Varieties, Texas: Meadow FFA Wins PhytoGen Cottonseed’s Denim Drive, California: Syngenta’s Aprovia Top Fungicide Gains State Registration, Helm Gains EPA Registration For Reviton Herbicide, Soybeans: Bayer Clears Major Hurdle For Rollout of XtendFlex Technology, Stephen Censky Returns as CEO of American Soybean Association, DTN Livestock Close: Contracts Find Support Before Closing, DTN Grain Close: Prices Sag Lower a 2nd Day. Pecan scab is by far the most economically significant disease that infects pecans in the southeastern United States and is the focal point in developing a fungicide spray program. You may also plant disease resistant trees when replacing those in the orchard. Root bark is decayed and brownish, and bronze colored wooly strands of the fungus are frequently visble on the root surface. Group 3 + Group 11 materials are excellent on leaf scab when combined and work well on nut scab too. However, the best bets for home growers are to select resistance cultivars and to use good cultural practices. Tebuconazole is a systemic fungicide sold for use on fruit trees under the brand name Elite. The fruit tree spray will prevent pecan casebearers. To try to reduce the development of strains of the scab pathogen that are resistance to a particular fungicide group, it is recommended that a single fungicide not be used as the only fungicide in a seasonal application program. You have to follow up with a continuation of sprays, rotating three different fungicides. . Baton Rouge, LA 70803 Winds and rain pass the fungal spores through the air and infect surrounding trees. Enable® 2F fungicide provides excellent control of pecan scab both on the leaf and on the nut. This highly concentrated formula contains the broad spectrum bio fungicide, Bacillus subtilis, which is highly effective at attacking and suppressing harmful garden diseases. A rampant fungal infection can keep you from enjoying fruit off your tree when harvest time arrives, and it can sometimes kill the tree. More important in years with heavy rainfall. Dr. Brenneman’s work has demonstrated very good results on nut scab with as much as 98%-100% reduction under heavy pressure situations. Treatment to control scab includes removing affected leaves and husks and applying a fungicide such as benomyl, fenbuconazole or propiconazole, beginning when the leaves sprout and continuing every 2 to 3 weeks … Free delivery . Compare. Fungicide applications should be made before infections take place in order to prevent disease buildup. 12). All of our pecan fungicides have begun at this point. The group with the lowest tendency appears to be Group 30, with Group M in the middle. Email . For information on pecan scab disease and tips on preventing pecan scab in your orchard, click here. 7. To reap its benefits, spraying should be done consistently and thoroughly following the guidelines below. I have a small pecan orchard (23 trees). In Oklahoma, this disease is usually … Fortunately, disease or a combination of diseases never reach a level that kills the tree. Moss and Algae Killer and Surface Cleaner Ready-to-Spray Concentrate Model# 5324-6A $ 16 98 $ 16 98. Tweet 1. The average cost of pecans ranges from $2.86–$3.50 per … You will see one program for highly scab susceptible varieties (think Desirable, Pawnee, Cunard) and another for more moderately susceptible varieties. Bonide 16 oz. Elast and Tin both work better on nut scab than on leaf scab and when combined are an excellent choice for nut scab. Prevention & Treatment: Some pecan cultivars are more susceptible to powdery mildew than others. Pecan trees are susceptible to several diseases in our area due to the hot and humid environmental conditions typical of the state. One of my pecan trees has a black spot fungus on the outer covering that developed 3 years ago. Although there is no guarantee that any method of use will delay resistance development, it is recommended that each fungicide application be made with a product from a different group than was used in the previous application. Elast/Tin. Mix the solution thoroughly and continuously throughout application. Group 3 + Group 11 materials are excellent on leaf scab when combined and work well on nut scab too. Elast/Tin. Pecan trees are prone to fungus diseases such as scab, powdery mildew, crown gall and wood or heart rots, according to the North Carolina Cooperative Extension Service. Because good spray coverage is required and trees may be very large, only special spray equipment can be used. The inner shell was good and the pecans were fine. ), Absolute (or Miravis Top if pressure is high), Group 3 + Tin (or Elast/Tin if pressure is high). Promptly removing leaves, nuts and twigs from beneath the tree as they fall also discourages the disease. The Pecan ipmPIPE program was organized during 2008 and winter/spring of 2009 by scientists (S-1049) and pecan producers (Pecan ipmPIPE Producer Advisory Board with representatives from pecan producer organizations) to plan, develop and launch the initial Pecan ipmPIPE Web site in April 2009. Systemic Fungicide Movement in Pecans •Abound, tebuconazole and phosphites show some movement up into existing foliage, and excellent movement into new leaves not present when sprayed •Phosphites also move down (at least 2 leaves) into existing foliage •Can a highly mobile fungicide (ie. I attended the Texas A&M Pecan Orchard in 2013 and ever since have had a difficult time finding a fungicide I can afford. The pecan is the state tree of Texas and has an important place in the state’s history. Young Trees All of our pecan fungicides have begun at this point. It is also important to follow a fungicide spray program throughout the season. Michailides, and … 1. Growers should consult Extension. Absolute. Kphite 7LP is also the better choice of fungicides for protecting pecan trees after hedging, trimming, or whisping. Fruit Tree Spray . Pecan tree stems, buds and leaves coated in white powder are suffering from a powdery mildew outbreak. Symptoms of infection are similar on all parts of an infected plant. Zinc Sulfate can be applied along with both fungicide and insecticide spray, which should be applied any time spraying is warranted. Pecan scab disease is an extremely destructive disease affecting pecan trees. In addition, the cost of fungicide application reduces the profitability of pecan production. There are several other fungal diseases that can infect pecan, but they are usually controlled when using a fungicide spray program to control pecan scab. Share with friends: $ 16.00. Native and improved pecan trees are grown commercially on about 70,000 acres in Texas. Georgia Pecans: Fungicide Schedule – Spray When You Need, but Not More than Neccessary. Elast/Tin *Check mixing compatibility of your phosphite and foliar zinc (or other foliar nutrient) choices prior to application. Last year I had a ZERO crop due to SCAB. There are several fungicides labeled for control of pecan scab disease. Water Stage (mid-late July): Apply Bonide Fruit Tree Spray or Fung-Onil to prevent pecan scab. In some regions of the state, pecans are also attack… Hi-Yield® zinc sulfate is critical in growing productive pecan trees. Vein spot is a common disease of pecan leaves. If your veggies, flowering plants, trees, or shrubs are wilting and dying due to disease or fungus, then take action with Serenade Garden AGRSER32 Disease Control Effective Organic Fungicide. Similarly using different products from the same fungicide group will not reduce the chances of developing resistance to the entire group. Stuart and Schley are extremely susceptible. Approximately 12,000 acres of pecans are managed commercially in three areas of the state: southwest, southeast lowlands and central Missouri. Factors such as location and weather will play a part in which issues your tree encounters. Certain fungicide groups have a greater tendency for pathogens to develop resistance to them. Big commercial growers spray fungicides repeatedly on their pecan trees in an attempt to reduce pecan scab symptoms. Based on Dr. Tim Brenneman’s research results, I feel that the following would be good choices. Mid-season (mid-late June): Six weeks after the last sprays, re-apply Bonide Fruit Tree Spray. Conference. The spread of disease-causing organisms is sometimes associated with the presence of certain insects and weeds. A thin film of the fungicide prevents the scab fungus from developing by killing spores before they can invade susceptible tissues. Variety selection and fungicide applications. Home Pecan Diseases ... not foolproof, so preventative fungicide applications may become necessary for control of scab. SKU: Growth, Fungicide and Herbicide:Zinc Sulphate Categories: Fertilizers & Soil Care, Growing Supplies. Diseases like phytophtora (soil-borne disease) and Botryosphaeria (wood rot organism) maybe factors as our pecan trees recover. Although fungicides are available, the average home grower lacks the equipment necessary for application. Store-bought fungicides can be horribly expensive and many contain chemicals that aren’t good for your health or the environment. trees the foliage is receptive to zinc during the entire growing season. Spring rains likely provide the needed moisture for infection to occur. It should be noted that resistance to all of these groups has been reported with pathogens on other crops. A list of fungicides recommended for pecan scab disease control is included at the end of this article. One of my pecan trees has a black spot fungus on the outer covering that developed 3 years ago. Vein spot infections (lesions) are very similar to those caused by the scab fungus. For very young trees, a few fungicide applications in a season with some Tin is good. Spectracide Immunox Multi-Purpose Fungicide 16 oz Spray Concentrate For Gardens Model# HG-51000-2 View the Spectracide Complete Garden Insect Control $ 14 99 $ 14 99. Today, multiple fungicides are used to control pecan scab. Leaves will turn yellow or brown and will remain attached to the tree. Control of pecan scab with fungicide is expensive because multiple applications of fungicides are required from the time trees begin to grow in the spring until the nuts mature in the fall. Pecans (Carya illinoensis) are common as a shade and nut tree in the southeastern U.S., where they also grow wild in native bottomland forests. We have lots of newer planted trees in the county, here are some being sprayed last week. The fungicide groups with the highest tendency for resistance selection should be used in the first half of the growing season which is when scab disease intensity is usually lowest. SKU: Growth, Fungicide and Herbicide:Zinc Sulphate. The bacteria transform normal plant cells into tumor cells, … The 1st year (3 years ago) 2014, the fungus grew on the outer covering after pecans had developed. It effectively controls diseases such as anthracnose, bacterial leaf spot, fireblight, and botrytis among many others. I don't know the type of pecan but bought it at a nursery. Works well with others. Another approach is to use products that contain a combination of two groups of fungicides. Bonide Captan Fungicide is not specifically labeled for pecan scab. Photo: Andrew Sawyer, Extension Agent, Thomas County, Georgia: By Lenny Wells, University of Georgia Extension Pecan Specialist, Corn: Final Syngenta Payments Coming – DTN, Dec. 11 Deadline Approaching for USDA COVID Relief, Farmer Sentiment Pulls Back Post-Election – Ag Barometer, Huge Australian-Type “Mother Bins” Promise Increased Harvest Efficiency – DTN, Crop Progress: Cotton Harvest Ahead of Pace, Improvements to Wheat Conditions – DTN, HORSCH Adds Multi-Soil Tillage System To U.S. Water Stage (mid-late July): Apply Bonide Fruit Tree Spray or Fung-Onil to prevent pecan scab. Therefore, homeowners and commercial growers alike should be aware of … While commercial pecan growers have the this is not the case for homeowners with only a few trees. Pecans are susceptible to several foliage, fruit, and root diseases in Texas. Dusting Wettable Sulfur . The LSU AgCenter and the LSU College of Agriculture, 101 Efferson Hall Control of pecan scab with fungicide is expensive because multiple applications of fungicides are required from the time trees begin to grow in the spring until the nuts mature in the fall. More important in years with heavy rainfall. It is one of many great products we carry for scab on pecan trees and should do a great job for you when used as directed on the product label. I hope you all are staying safe amid the coronavirus concerns out there right now. He and his collaborators are working toward developing a method for inoculating pecan trees with the fungus in order to produce truffles consistently. Growers who have pruned in the winter months will benefit from … The fruit tree spray will prevent pecan casebearers. Pecan, Winter Tree Stress Recovery Austin, Texas, How to mulch tree, Tree Fertilization, Austin, Texas, Lawn Fertilization, Certified Arborist, weed and feed, Live Oak fertilizer, weed control, Austins finest locally owned Lawn Care company. But it is not the only disease that growers may face in the new season. Pecan trees are prone to fungus diseases such as scab, powdery mildew, crown gall and wood or heart rots, according to the North Carolina Cooperative Extension Service. Livestock: Record High U.S. Red Meat Production in Oct. DTN Cotton Open: Rebounds to Begin New Month, Dissecting Unexpected Movements In Wheat Prices – DTN, DTN Livestock Open: Technical Support Developing in Lean Hog Futures, DTN Grain Open: Dec. Begins on Higher Note, Shurley On Cotton: 74-Cent Potential If The Right Factors Align, Ag Trade: Chinese Imports of U.S. Corn Could Hit 30 Mln Tons, Texas: Annual Farm and Ranch Seminar, Online, Dec. 10, DTN Livestock Midday: Contracts Looking for Support, DTN Grain Open: Markets Mixed to Close Out Month. Vegetable, Flower, Fruit and Ornamental Fungicide . Nebraska: Soybean Cyst Nematodes Updates – Video, Corn Market: Oil Prices Exerting An Effect – DTN, Nebraska Soybeans: Gall Midge Control – Successful And Unsuccessful Approaches – Video, Minnesota: Performance Comparisons of Soybeans Varieties, North Carolina: 2020 Crop Protection School Will Be Online, Dec. 2, Texas: Online Pesticide Applicator Program, Dec. 3, Texas: Online High Plains Ag Conference, Dec. 4, Minnesota: Online Crop Pest Management Connect Conference, Dec. 8-10. Photo: Andrew Sawyer, Extension Agent, Thomas County, Georgia: I have had many requests to provide a pecan fungicide schedule example for 2018. Pecan scab , caused by the fungus Cladosporium caryigenum, has been a known problem in pecan production since 1888 and is recognized as the most destructive disease of pecan trees. UGA Extension Horticulturalist Dr. Lenny Wells says trees in the first few years need to be sprayed but not on a detailed spray program. The group with the lowest tendency appears to be Group 30, with Group M in the middle. Infected trees die suddenly. With increased acreages of pecans in commercial production, diseases, insects, and weeds are becoming major problems. Severe scab can reduce pecan nut size and result in a total crop loss. We will be getting the county meeting presentations up on our website soon. Miravis Top (this should be about the time nut sizing begins), (Continue with Elast/Tin or rotate with Absolute if additional sprays needed beyond this point. Neem RTU . Triadimefon is a systemic fungicide that’s sold under several brand names, but only Bayleton 50% DF is labeled for use on fruit trees. Thus, use a variety of fungicide groups for pecan scab disease control and make applications in a preventative manner before disease builds up to levels that will harm the crop and make control difficult.For the list of the currently recommended fungicides for scab control, please see the above mentioned Fungicide Application Recommendations for Pecan Disease Control on the Plant Pathology page of the Pecan Station website.Question answered by Dr. Randy Sanderlin, Pecan Research-Extension Station plant pathologist. Call Us: (800) 733-0324 Log In/Register Blog View My Cart ( 0 ) Items 225-578-4143 Set your store to see local availability Add to Cart. Make a fungicide solution by infusing 3 ounces of minced garlic in 1 ounce of mineral oil for at least 24 hours. Dr. Brenneman discovered pecan truffles (Tuber lyonii) in Georgia in the late 1980s. Broad Spectrum Landscape & Garden Fungicide RTU . Vein spot lesions, however, tend to be linear rather than round and also tend to be restricted to veins (Figure 2). Fungicides labeled for treating scab include Benlate 50WB, Enable 2F and Orbit 3.6EZ. If that’s the case, homemade fungicide sprays could be the solution you’re looking for. In Louisiana, control of diseases is required for consistent production of high quality pecans. Triple Action RTS . The 1st year (3 years ago) 2014, the fungus grew on the outer covering after pecans had developed. Fungicide Application Recommendations for Pecan Disease Control.