Carya ovata hickories are deciduous trees in the Juglandaceae menage . These tree typically wax to between 70 and 90 feet and scatter up to 70 feet . The shagbark Sir Herbert Beerbohm Tree bloom green - white-livered flowers in the outflow and edible nuts that ripen in the fall . These hickory Tree are typically plant as ornamental trees in large area . Shagbark trees are susceptible to numerous diseases .
Hickory Anthracnose
Hickory anthracnose , sometimes caused leaf spot , is a fungal disease ( Gnomonia caryae ) that can cause utmost defoliation during ice chest , smashed weather . Initial symptom let in bombastic , flushed to purple spot seem on the upper leaf open while brown spot shape on the undersides . Other signs include dying buds , premature foliage driblet and dying twigs . These spots often merge to imprint gravid splotch . While one anthracnose attack normally does n’t harm the tree , chronic infections causes scrubby leaf growth . The hickory anthracnose pathogen overwinter in pass leaves . Control typically includes run down up and disposing of the leaves each fall .
Trunk Rot
tree trunk rot is a canker disease due to a fungus ( Poria spiculosa ) . This disease kills the affected tree diagram ’s bark , which causes cankers to form around the dead branches . These cankers often sprout fungal , fruiting body that spread in the wind . The fungal pathogens cause a heart rot that spreads throughout the entire trunk . There is presently no therapeutic for trunk rot , but removing infect tree will thin out the hazard of spreading the pathogens .
Hickory Downy Leafspot
Hickory fluffy leaf spot , also called white leaf spot and white mould , is a fungal contagion ( Microstroma juglandis ) that often attacks shagbark tree . Initial symptoms typically include discolour spots on leave of absence . These billet often merge to work large lesion . foggy , white point look on the undersides of the leaves close to the veins . Small , lily-livered Scots heather often appear near branch crest . Control includes pruning the brooms from the tree diagram .
Leaf Blotch
Leaf blotch is a fungal disease ( Mycosphaerella dendroides ) that typically attacks shagbark hickories in the early summer . Initial symptoms include small-scale , olive - colored spots forming on the undersides of mature folio . These spots plow a shining black when the wind blows the fungal spore off of the leaves . Severe leaf blotch cause trees to defoliate by previous summer or other autumn . foliage blotch is commonly controlled with applications of fungicide .
Verticillium Wilt
Verticillium wilt is because of a soil - borne fungus ( Verticillium dahliae ) that attacks stressed Sir Herbert Beerbohm Tree radical . The pathogens then work their manner up , plugging the tree ’s vascular system . Above ground signs of this disease admit wave , yellowing and wilting leave . decease leave often stimulate the shagbark hickory to defoliate . Branch kick the bucket back is also common . Control include removing the septic trees .
Powdery Mildew
Powdery mildew is a fungal growth ( Microstroma juglandis ) that often looks like junk accumulation on the tree ’s leave . Initial symptoms include the formation of small-scale , white leafage spot that enlarge and merge to produce a continuous mat of white or grey-headed mould . This disease also induce stunted and malformed flower buds and fruits . Some trees hurt from untimely folio fall . Powdery mildew typically attacks shellbark hickory hickory trees recently in their growing season . The pathogens thrive in humid weather and overwinter in fallen leave . Control includes rake up and burning fallen leaves .
