Symptoms of Peach Tree XDisease. Initially, Xdiseaseinpeaches is indicated by discoloration of infected leaves on a few branches.TreatingXDisease of Peach Trees. However, long-term studies are necessary to evaluate the cumulative effect of injections. Literature Cited Allen, W.R. and T.R. Davidson. 1978. Dosage response and duration of symptom remission in X-diseasedpeach trees treated with oxytetracycline-HCI in Ontario. X-disease spreads in mid-summer to late October when specific leafhopper species spread the pathogen from infected to healthy hosts. Monitoring weather and preventing infection. Weather monitoring does not play a role in X-disease management. Treated Water Use Restrictions (Number of Days). Treatment of Aquatic Weeds.This slide is labeled Hale peach from The Dalles with western Xdisease." OSU Extension Plant Pathology Slide Collection, 1950. Tattered leaves due to X-disease. Infected trees cannot be treated or cured, and the only effective management strategy is to identify and remove infected trees and apply insecticides to suppress vector populations.Lacy, G. H. 1982. PeachX-disease: Treatment site damage and yield response following antibiotic infusion. ... PeachX-disease, caused by a mycoplasma-like organism (MLO) (Jones et al., 1974), can severely damage peaches.In four sessions, the panel of tasters discerned between pears from trees treated with OTC and pears from untreated diseased trees. X-diseasedpeach trees with 9- to 17-cm trunk diameters were treated at various times during the growing season with five rates of oxytetracycline-HCI (OTC). Injections of 1.25, 2.5, and 3.75 g OTC per tree in September induced remission. In Ontario (Canada), losses due to the disease are increasing. Microinjection capsules of oxytetracycline have been used successfully to treatpeach trees (Cooley et al., 1992). PeachX-disease: Treatment site damage and yield response following antibiotic infusion. .In Virus Diseases and Other Disorders with Viruslike Symptoms of Stone Fruits in North America United States Department of Agriculture Agriculture Handbook, vol. 10, pp. 37–42. PeachX-disease often follows a 10-15- year cycle. The disease will be very severe for 4-6 years, then will gradually disappear as a commercial problem until the next cycle begins. The reason for this cyclical pattern has never been determined.
