OCR Text |
Show Ornamental tree damage discussed BMVarga.U.S.U. Steven Cox, Uintah County Agent Many shrubs and ornamental trees, Eluding shade trees, have been Imaged by the cold temperatures of toe winter 1978-79. As you observe the browning of Junipers, you may think these shrubs are completely killed, but vou should check more carefully to see the buds have also been killed. If the foliage is brown, but the buds are yet creen it is possible that these ornamentals or-namentals will recover. It is also possible that portions of ornamental shrubs and trees of the evergreen type, will have relatively large branches that were killed, whereas other branches will have new growth in the buds or candles which will develop relatively normally. It would be well to wait then before making a certain decision as to whether evergreen shrubs or trees should be removed until you are able to observe the degree of recovery. If all limbs are dry and brittle, it is dead and can be removed. Spider mites have caused extensive damage to Rocky Mountain Junipers in Vernal and Manila. This can be mistaken for winter damage. To inspect in-spect these trees, place a white piece of paper under a limb, tap the limb firmly and look for mites slightly smaller than a pin head. Plictran, Isotox or other chemicals registered for mite control, can be sprayed on these trees to control the mites. Be sure mites are on the lable or you could cause a mite build- UD. Certainly shade trees are susceptable to winter damage. Blue ash,' a short lived tree that is susceptable to many disease problems, received severe injury. Most of these trees have leaves on the lower branches, but many of the upper branches have been killed. The dead branches need to be trimmed out either now or in the spring. Do not trim out live branches now, wait until spring. You have probably observed certain branches on the trees leaf out then the leaves dry up and the limb becomes dry. One of the reasons for this happening hap-pening is that the cambium layer under the bark that carried nutrients, dies in spots. If too many spots occur on a limb, the limb dies. Earlier it can transport enough nutrients to cause the leaves to form, but later the limb dies because nutrients cannot move along the cambium layer under the bark. Trees such as Syberian Elm, Willow, Poplar, Black Walnut, Box Elder, Quaking Aspen, Cottonwoods, Silver Maple, Norway Maple, Blue and' Norway Spruce, and American Elm lave, in general survived the winter without serious injury. Considerable winter damage appears evident in the following: Blue Ash, Austrian Pine, Chinese Junipers, Scotch Pine, European Ash, Arborvitae, EasternRed Cedar and Siberian Elm. t would be well to observe the types o' trees which have been seriously damaged and during the past winter, then avoid replanting those which have sustained serious injury. Freeze such asoccured during the winter of 1978-79 wcur approximately once every 20-30 years, so that this would be a time for observation and making of decisions of which trees and shrubs to plant for ig-range landscaping for homes in we Uintah Basin. If you are uncertain e names of the trees which you ""We, it would be well to contact urserymen or knowledgable men, or v.duals who can help to identify l"s and ornamental plants so that you y readily observe those which have Tl ? the harsh winter. and those racn have sustained serious damage. tal tf?ho are Particularly in-sd? in-sd? . m the growing of fruit trees, wSu J668' and ornamentals, might ' take a tour around the Basin, in-' g the f00thi11 areas and several of canyo with good air drainage, to jwve the differences which are Wa nt at this time of year. You will climl lu-See tne effects of mycro-t mycro-t m "teh,ch influences differences of (Ei S in rent locations, tte yyouwillnote that locations in theromof the valley are colder, and oftrrg?,'Smore severe- The growth the cam he foothills and the mouth of will all0"8 15 considerably better. You wen ri I tC that fruit trees grown in the B'in I0'1' a,on8 the edges of !Perv L!here they have have ,L har!ened in some instances , Mttr"Ved the winter better than ' it is n1i;grownon heavier soils where There arp t0 harden these trees, i PeraturJ exceP'ons where the tem-fr'inEnrn tem-fr'inEnrn S0 cold that even ap-denX ap-denX rticultural Practices in ' to prevent6 'fees' was not sufficient i Possibly .Some winter damage, and i damage (l" very severe winter 1 Much P0'"1 of killing of the j the effect:n can he learned however in 1 fxtent in th ocation and to a certain : Adenine tt advantages of properly . Futures t trees for cold tem" I anynewhn .Wlnter to encourage ! oftreeSan7 ls "Crested in the growth i! techr?""1611131 Pnts, to learn -1 year as C S ,and aPP'y them each ; early a, of summer approaches ly autumn begins. |