![]() ![]() If possible, spray plants when you’ll have at least 12 hours of dry. If the fungus is on fruit trees or vegetable plants, you can safely continue to spray every seven to ten days until harvest. Otherwise, apply the product immediately when you first notice signs of fungal disease. Based on the results, more precise fungicide use recommendations and fungicide programs can be developed for early blight management.Ĭhemical disease management field crops fungi vegetables. Ideally, apply copper fungicide before fungus is visible. Specialty fungicide programs increased overall tuber yields by 4 and 9% over standard fungicides and nontreated control, respectively. Furthermore, control efficacy of both fungicides was higher (3 to 9%) at late bulking and tuber maturation when compared with early bulking crop growth stage. Select the Right Fungicide to Protect Your Potatoes Know the Pathogen. A low-cost tool helps solve the problem by. ![]() They are often unsure of which type of fungicide to use (systemic or contact) and the appropriate time to use it. For both potato growth stages, specialty fungicides performed better than standard protectant fungicides. Small-scale potato farmers in developing countries use fungicides to control late blight, increasing production costs and exposing their health by applying the toxins without protection. Control efficacy of fungicides ranged from moderate to very high (>30 to 75%) compared with the nontreated control. As a result, throughout much of the potato growing regions of the United States where early blight is an important foliar disease, boscalid replaced the QoI fungicides in the foliar fungicide pro-gram. Control efficacy at two crop growth stages (tuber initiation/early bulking and late bulking/tuber maturation) and the overall tuber yield response to standard and specialty fungicides were assessed using network metaanalytic models. United States for use on potato in 2005 and proved to be an excel-lent fungicide for early blight disease management (18,19). For fields with history of scurf, the cut sprouts or vines should be dipped to a depth of about 5 inches in a. Sprouts cut above the soil level, or vine cuttings, of healthy plants will be scurf-free. To manage early blight, standard protectant fungicides and single-site mode-of-action "specialty" fungicides are applied either alone or incorporated into a fungicide rotation program. Unseen contaminating spores can be killed by dipping the roots in a fungicide. Because of the lack of resistant potato cultivars, fungicides are applied extensively to obtain adequate control. Early blight is an economically important foliar disease of potato in the United States. ![]()
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