Show Utah U tah ards W Vill I 11 Gei k 1 f I J F For or Di sease II ns ate under way for a com com- complete complete survey to be made through through- Utah for the detection of peach mosaic disease a according cording to Dr A L Stark horticulturist at at the Utah S State Sate ate Agricultural College The survey which will be- be begin begin gin in May will under the direction of- of entomology of the United States de- de of of agriculture in Cooper cooper- cooperation ati with the th state department of agriculture the college experiment station and the college extension service Dr Stark said that in early spring it is easier to detect trees with peach mosaic When the leaves develop at this time of year they are arc small narrow crink crink- crinkled led irregular in outline and deli mottled with yellow light and amI dark green gre-cn mosaic The yellow light areas are most evi evident ent in streaks to the midrib of the leaf Later in the summer a marked shortening of the internodes is noticeable Due to this shortening of the inter inter- internodes internodes nodes the leaves of the trees clus clus- cluster tel ter to give the general appearance ance aiice of the common poinsetta The mosaic is caused b by a virus which if present in th living tissues tissue s of diseased trees Dr Stark ex plains It may be transmitted from fromI fro m I tree to tree by j if iii material is used Conse Conse- fluently in budding in slid and grafting every precaution should be taken take n to use only health healthy stocks an d scions It is also possible that the c virus may be transmitted by in- in insects in insects sects Often trees become infect infect- infected infected ed in one season and nd do not show alto w the symptom until the following g season There is no known cure for fo r peach mosaic according to Dr D I Stark The only wa way to combs combat t I the disease is through n and burning of diseased trees and an d branches The cutting off of the th e affected branches will not control of the disease as the virus irus is likely likel y to be in all tissues of the tree Since peach pach mosaic is a 3 newly newt y discovered disease growers in this thi s section arc not thoroughly familia r with its appearance Dr Stark Star h urges that suspected mosaic trees tree s be reported to lO him at the Utah Uta h State Agricultural college e at Lo- Lo Logan gm gan or to the county a agent ent |