The quake aspen tree ( genus Populus tremuloides ) , also known as the trembling aspen , acquire in most of North America . Quaking aspen trees develop up to 60 metrical foot marvellous and 30 foot broad . The wood from the aspen is used mostly to make newspaper products . During the winter , deer use up the bark for food and birds eat up the buds .
Hypoxylon Canker
Hypoxyon canker is one of the big killers of quaking aspen trees in North America . Symptoms of this disease admit : yellow - orange indented area on the trunk of the tree ; beat branches ; irregular bumpy edges around the diseased area ; and invasion by insects .
The aspen ’s bark becomes dappled as the disease progress and acidic - odorous sap flows from the hurt area . blister appear under the dead barque after two old age of disease . The bark bursts receptive and underneath are small bristle called hyphal pegs .
The hyphal rowlock produce spores which then crumble . After the spores decay , the inside barque becomes glistening with black and yellow fleck . canker look after two to three age from the onset of the disease . Black , crusty , toxic fungus forms cankers that encroach upon the healthy bark of the tree , cracking it along the edges of the pestilence . The beat bark drops off the tree diagram , leaving a checkered radiation diagram behind . Cankers can be up to 3 feet blanket . After suffering for age with the disease , the cankers besiege the tree diagram , wipe out it . The weakened country of the pathologic aspen also causes it to be susceptible to wind damage before the cankers actually destroy the Sir Herbert Beerbohm Tree .
Cytospora Canker
Cytospora canker , a fungous disease , affects quaking aspen trees as well as spruce , cherry red , birch , Tilia heterophylla and poplar . The disease causes cankers to form on the trunk and branches of the tree . The Cystospora canker disease is easily placeable on quiver aspen trees because the orange cankers stand out against the calorie-free bark .
Cytospora symptom in aspen tree diagram appear as bark that has orange fleck and shades of yellowish , orangish and fatal on the branches and on the tree diagram luggage compartment . A sticky liquid also flows from the cankers . The canker appear as indented , black areas on the dead bark . The cankers also present black hickey that reproduce more kingdom Fungi . Dampness get the pimples to produce vast amount of spores that seep from the pimples in long , orangish thread .
The cankers countermine the resistance of the aspen trees , stool them meridian hosts for insect plague . The disease eventually kills the tree diagram .
Heartrot
Heartrot is triggered by the fungus Phellinus tremulae . The disease spreads quickly , specially if the quaking aspen tree is already under stress from drouth , insects or root impairment . Heartrot prevents the Sir Herbert Beerbohm Tree from eliminating waste by cause disintegration in the duramen of the tree where waste is deposited . When the heartwood becomes pathologic , the tree can not move waste products and eventually dies . The aspens become so weakened by heartrot that they are easy knocked down by strong wind .
