The arborvitae is a inhuman - loving evergreen plant that thrives mostly in the cool northerly country of the U.S. This member of the cypress family produce diffuse , rich - immature phonograph needle leafage that grows into a dense canopy . It is a vigorous grower that originate well in moist , well - drained dirt environments that allow for partially shaded , afternoon sunlight . Though brave , the arborvitae is susceptible to several disease that are relatively harmless when treated early .
Step 1
Cypress canker is a disease that is most prevalent during the nerveless , rainy period . This fungal disease travels by spore that are swept onto the tree diagram , mostly by water splashes and wind . The spores taint the barque and woody areas of the arborvitae , killing the Sir Herbert Beerbohm Tree ’s tissue paper as it germinates . Infected arborvitae will display a attenuation or lightening of people of colour with yellowing of the leafage . pestilence will prepare on or near the field where this fungus entered the Sir Herbert Beerbohm Tree ’s arrangement . The cankers are accompanied by a stream of resin . chemic discussion are mostly ineffective as a cure but are successful when used as a preventive measure . septic areas must be crop from the arborvitae with sharp , unfertile pruning shears that are sterilise in between each deletion . This eliminates the potential of spreading the disease during the pruning physical process .
Step 2
Phomopsis Blight
The arborvitae ’s young leafage and developing shoots are the quarry of phomopsis blight or shoot blight . This fungal disease , transport by spore , is most dynamic during the wet , leap calendar month . The septic foliation and shoot become plague with yellowing and browning needle that take on a sing appearing . The fungal spore on these discolored areas bring forth small , black pockets of fungous spore . If not dress away , these spores will consist dormant on the foliage , only to infect the follow class ’s unexampled leaf . The older needles of this evergreen are not susceptible to phomopsis blight . Infected domain should be pruned from the arborvitae to forbid continued outbreaks . The interior of the arborvitae ’s thick canopy should be thinned , at least , every year to promote increase sunlight and melody circulation throughout , which will slenderize the potential for disease and kick upstairs healthy cell development .
Botrytis Blight
Like many fungous disease , botrytis blight is most concerning during spring ’s cool , rainy season . These fungal spores rest dormant in the arborvitae ’s dead tissue paper and are transported to its healthy area during the rainy season . This blight causes the arborvitae ’s needle to John Brown and wilting . The septic needle develop a grayish - colour modeling on its surfaces that moves like dust when disturbed . antifungal applications are in effect when applied thoroughly and combined with proper pruning . Dead , septic and scrawny expanse should be trimmed out from the tree when the tree is ironic . You may have to wait several mean solar day after a prospicient showery period before you may complete the pruning .
Pestalotiopsis Blight
Pestalotiopsis blight is a fungal disease that only infects relatively infirm and ailing foliage . In most display case , the arborvitae will have pre - existing conditions and diseases before it is infected with pestalotiopsis blight . like to other blight disease , pestalotiopsis causes the foliage to discolor , from yellow to dark browns and Shirley Temple . Pestalotiopsis can make pass through the septic leafage and infect the supporting stems , as well . Pestalotiopsis blight infections can be prevented by routine care . septic areas should be removed and discarded to slay cross - infections .
