Timing was critical, and repeated sprays were needed to have any effect at all. Pyramidal in youth, it develops a spreading rounded or irregular crown with age, supported by a few very large diameter branches. are deciduous trees prized as shade trees for their fast growth rate, attractive, unusual bark and large, lobed leaves. London planetree (P. × acerifolia) exhibits varying degrees of resistance while Oriental planetree (P. orientalis) is considered resistant. This not only shapes the canopy well but helps maintain the street trees at the optimum height. For all anthracnoses, a fungicide application at leaf emergence (chlorothalonil, tebuconazole or for homeowners, Spectracide Immunox) can reduce the incidence of infection. This fungus overwinters in fallen leaves, so these diseases are the most severe in natural or wooded areas where the fallen leaves collect from year to year. We recommend a trunk injection with a systemic fungicide, either PHOSPHO-jet or Propizol Fungicide. They tend to congregate in sunny areas in early spring, such as on the south side of houses. Let’s explore these issues. They feed on tissue just below the terminal bud, and soon afterward, females lay their eggs within the feeding sites. Sycamores (Platanus sp.) Sycamore anthracnose is a fungal disease that can cause leaf drop, twig dieback, cankers and the sudden death of more than 90% of a tree’s new shoot growth. Posted September 23, 2015 at 3:30 pm by Emerald Tree Care, LLC & filed under Anthracnose. Sycamore is a massive tree reaching 75 to 90 feet in height, has a rapid growth rate, and tolerates wet and compacted soil. 12-hr reentry. REI = 12 hours), and copper fungicides. Phytophthora. It seems to be particularly troublesome in the Park City area. They need to be applied at bud break the following year to prevent infections of newly forming leaves and of young, growing shoots. Your sycamore tree is particularly susceptible to anthracnose —a fungus that turns leaves black and brown in summer. SYSTEMIC FUNGICIDE for fungi infecting vascular tree tissues causing wilt and tree dieback such as: Laurel wilt (Raffaelea spp.) (When the leader dies, a lateral branch curves upward and becomes a new tree leader.). Since 2000, a new generation of phosphonate fungicides has been developed, the phosphite salts, which contain potassium and/or ammo- Figure 1. Group 3 fungicide. Sycamore Anthracnose (fungus – Gnomonia plantani): Sometimes called blight and scorch. diseases in a wide variety of trees and palm plants in urban environmental, residential areas and interior plantscapes. Other terms are “horticulture oil,” “superior oil,” “mineral oil,” “spray oil,” “all seasons oil,” etc. F and 3336. Remove the injection tees once you finish injecting the fungicide. At the same time, very few beneficial insects are active at this time, making this application a safe tool in pest management. Always follow the recommendations of the fungicide and injection system manufacturers. Fungicides registered for the control of sycamore anthracnose include chlorothalonil (Daconil Zn, Daconil Ultrex and Daconil Weathe… REI = 12 hours), thiophante-methyl (3336. Use a rate of 2% oil in water (2 oz oil in 100 oz water; or 2 gal per 100 gal). Insert an injection port, or tee, with connected tubing into each drilled hole, gently tapping it in with a hammer to make a secure, airtight connection between the tee and the active xylem. The ideal time to treat for scale is when the buds start to swell and the leaves just begin emerging (budbreak). Boxelder bugs are slowly becoming active as the temperatures warm. Repeated infections can happen all spring until rains end and temperatures rise above 80F. Group 3 fungicide. History of Sycamore Anthracnose Treatment In the past, the only real option open to arborists for the treatment of Sycamore Anthracnose was to spray various fungicides on the leaves and twigs to try and control the disease. 12-hr reentry. This insect will attack white pine, Austrian pine, blue spruce (shown), limber pine, scotch pine, Norway spruce, Douglas-fir, and others. H; Tebuject 16 is registered for tree injections. Direct-Inject Tree Injection System. An American sycamore (Platanus occidentalis) provides shade and beauty in large backyards for up to 250 years. 12-hr reentry. Most can be used during both the dormant and summer seasons (but the rate may differ). The treatment for anthracnose is to clean up fallen, diseased leaves and cut off dead twigs and branches. Fungicide. On valuable or highly-prized sycamores, an injection of fungicide into the sycamore's root flare in late summer or fall can protect the tree from anthracnose for multiple years. H; Tebuject 16 is registered for tree injections. Avoid overhead watering to help reduce humidity. Improves the appearance of infected sycamores over multiple years. Believed to be native to the United States, it is found throughout the range of sycamores. For example, the fungicide label may recommend that you inject 8 ounces of chemical diluted with 20 parts water per every 5 inches of trunk diameter. Arbotect 20-S Arbotect 20-S is the industry standard fungicide for the prevention of Dutch elm disease and suppression of sycamore anthracnose. Trigo at 3 to 9 oz/100 gal water. Signs & Symptoms of Red Oaks With Oak Wilt, Kansas State University Agricultural Experiment Station and Cooperative Extension Service: Anthracnose of Shade Trees. One application of Arbotect by macro-infusion protects the entire canopy for multiple growing seasons.Dutch elm Anthracnose can usually be prevented by taking good care of the tree and making sure it has enough water and fertilizer. 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