The willow oak tree Sir Herbert Beerbohm Tree is a fast - develop tree that can attain ripe tiptop up to 75 foot . This deciduous refinement Sir Herbert Beerbohm Tree create bare , rich - unripened foliage that turns to showy yellows in the downslope . Although the willow tree oak is drought - tolerant , it thrives in most land conditions and prefer moist , well - drained soils . Similar to its oak relatives , the willow oak is susceptible to several tree disease . Some of these disease can be injurious , if not fatal , to the Sir Herbert Beerbohm Tree if left untreated .

Armillaria Root Rot

Armillaria theme rot , or shoe lace root rot , is a common disease amongst oak trees . This soil - borne fungal disease attacks the willow tree oak through its root system . The disease not only causes the decay of the roots , it also decay the interior woody tissue , or cambium , of the tree ’s trunk . willow tree oak trees that have experienced previous tension , such as tenacious time period of drought and former disease , are most susceptible to armillaria root rot . The septic willow tree oak tree will feel discolored foliage , previous defoliation , growth stunt and overall personnel casualty of vigour . The badly infected oak tree will also build up creamy white fungal ontogenesis on and around the base of the tree . The appearance of these growths indicates severe trunk rot and decay . There is no cure for armillaria root rot and the infected trunk , including the stump , should be take away .

Oak Leaf Blister

oak tree folio bleb is a spore - borne fungous disease that is particularly active during the coolheaded , pissed geological period of spring . These spore jaunt by wind and rain down onto the foliation and buds of the willow oak tree . There , the spores germinate and spread contagion . The leaves of the infected oak develop little , icteric blisters that appear scattered throughout the leaves . Severely infect leafage will live leaf curl after becoming overwhelmed with blister . Although unsightly , oak tree leaf blister will not do permanent injury to the willow oak tree tree . This disease can be prevented with an annual fungicidal treatment that is applied in the early outflow , just before the onset of the growing season .

Hypoxylon Canker

Hypoxylon canker is a fatal oak tree disease . This spore - borne fungal disease infects the willow oak through natural orifice , wounds and other points of injury . The disease infects the DoI of Sir Herbert Beerbohm Tree and causes the decay of its sapwood . willow tree oak trees that are infect with hypoxylon canker will experience yellowing and wilt leafage . The discolored foliage will begin at the top of the willow oak and solve its means down , branch by arm . The tree diagram will also experience dieback and growth stunt which is often accompany by lightened barque that takes on a faded show . There is no cure for hypoxylon pestilence . However , vigorously growing , healthy willow oak trees are capable to defend themselves against the disease . The High Plains / Midwest AG Journal explicate that trees should be removed and destroyed if 15 percent or more of the tree ’s crest displays symptom of contagion .

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