The LSU AgCenter and the LSU College of Agriculture, 101 Efferson Hall DMI Fungicide (Tebuconazole or Propiconaole, etc.) The fungicide groups with recommended products labeled for pecan that have the highest tendency for resistance include Group 3 (DMIs) and Group 11 (Strobilurins). Elast/Tin. There are several fungicides labeled for control of pecan scab disease. Again, there are many such programs that one could put together. 6. I prefer the basic recipes, but sometimes you need to hit a fungicide with the big guns. I list it here for spray number 2 but it should work for spray 3 or possibly number 4 as well, depending on how soon you get to spray 4. A pecan with brown spots on leaves may be suffering from this fungus, but it also could be cultural, chemical or even pest related. Elast/Tin. b * indicates that the fungicide is also labeled for control of scab. Other common diseases are downy spot, powdery mildew, shuck dieback, stem-end blight, and bacterial leaf scorch. I have been using an off the shelve product (Ferti-lome liquid systemic fungicide II - 1-55% Propicanzole). This means the tree is simply too big for your average home garden to begin with. Hypothetically, the chances of resistance selection are reduced when the number of fungicide groups used in a group rotation schedule increases. Plant Food Systems, Inc., manufacturer of Kphite 7lP Fungicide/Bactericide says the product is moving into the southeast as pecan growers initiate their 2020 fungicide program. Was this answer helpful to you? 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. Tebuconazole+Topsin M+Phosphite. control of pecan powdery mildew in Oklahoma, despite a legal use label. Absolute+Phosphite @1 qt/acre. web@agcenter.lsu.edu, 106 Martin D. Woodin Hall 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. Schedule delivery. Quadris Top. Fruit Tree Spray Concentrate Model# 202 $ 15 42 $ 15 42. Elast/Tin. We’ve seen shifts in the sensitivity of the pathogen to some of our main fungicides. 2) Downward from 1 leaf to another on the same shoot? The group with the lowest tendency appears to be Group 30, with Group M in the middle. Gary Veal, Georgia based Technical Sales Agronomist, says that pecan growers are increasing the use of Kphite 7LP planning multiple applications in pre-pollination sprays. Pecan trees (Carya illinoensis) are widely grown in South Carolina mainly for both their tasty edible nuts and shade. Table 1 shows the critical periods for scab development during the growing season. Pecan trees are susceptible to several diseases in our area due to the hot and humid environmental conditions typical of the state. The most damaging fungal disease in the Central and East regions is pecan scab (Fig. 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. 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. Based on Dr. Tim Brenneman’s research results, I feel that the following would be good choices. Use Bonide Fruit Tree Spray after the Zinc Sulfate spray has dried to prevent pecan scab and webworms. *azoxystrobin (Abound), tebuconazole & phosphite . For homeowners, this becomes a difficult task once pecans reach their mature height of over 50 feet. 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 … Baton Rouge, LA 70803. 10. All these diseases can cause serious issues with your garden, algae on your lawn, or the trees on your property. Absolute. 11. Free delivery. 12). Vein spot is a common disease of pecan leaves. The 1st year (3 years ago) 2014, the fungus grew on the outer covering after pecans had developed. This represents a ten year average and should be reviewed with the realization that … 6. Pecan trees can grow to 100 feet tall, the height of a 10-story building. 7 Homemade Fungicides. Southern AG Insecticides Liquid Copper Fungicide is the best way to protect all kinds of plants from problems caused by bacteria and fungi, including all kinds of algae and ball moss. I don't know the type of pecan but bought it at a nursery. 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