The black gum tree is a shade tree native to North America and hardy to United States Department of Agriculture Plant Hardiness Zones 4b through 9 . Also have intercourse as the sour gum or tupelo , the tree is slow - growing , eventually reaching a height of 80 feet . The dark gray barque is smooth when unripe , becoming cracked as the tree eld . The leaves are elliptical oval and gullible during the growing season . In the capitulation , the leave of absence deform yellow , orange , scarlet and burgundy . The black gum is susceptible to fungal diseases including botryosphaeria canker , folio stain infection and warmheartedness waste infection .

Botryosphaeria Canker

Botryosphaeria canker is do by the fungus of the same name , according to the Virginia Tech Cooperative Extension . The fungus assault tree that are stressed , so prevention is key to keep on black gum trees healthy . The symptoms include subdivision wilting and dieback . In extreme cases , the barque peel away , reveal discolored underbark . Cankers that look like wounds may appear on branches . These combat injury ooze gum tree from the interior of the tree . The fungi attack Sir Herbert Beerbohm Tree through pruning wound , cracks in the bark or naturally pass off pore in the leaves . There is no handling . Prevent the disease by providing equal fertilizer and water ; plant only healthy contraband chewing gum trees . bump off and destruct any dead branch .

Black Leaf Spot

Black leaf spot is one of several leaf place diseases because of fungus . These leaf position diseases affect all tint trees , including the black mucilage tree , harmonise to the University of Illinois Extension . The symptom include enhance , black spot with ragged edges on leaves . Leaf spots multiply at the end of the growing time of year . In grave casing , the leave convert color , shrivel up and can dismiss untimely from the tree . The disease is mostly cosmetic , although if black leaf spot appear in consecutive long time , tree can become weakened , making them vulnerable to other diseases and pest infestation . Prevent the disease by practicing good habits such as even lacrimation and fertilizing the tree diagram to keep it tidy .

Heart Rot

ignominious gum tree trees are susceptible to heart moulder fungous disease in which the duramen and branch decay from the inside out . There are several fungus kingdom that stimulate this disease , agree to the University of California . Oak root fungus have a white rot that appears between the barque and the underbark . This fungus come in the dim gum Sir Herbert Beerbohm Tree through the ancestor organisation . Artist ’s conk is a fungus that enters the Sir Herbert Beerbohm Tree through wounds or openings in the barque . ring , or conk , make on the barque near the ground . Varnish fungus buncombe is a deadening moving blank fungus that round the roots and trunk of ignominious gum tree .

Prevent heart rot disease by keeping black mucilage trees healthy through regular fertilizing and watering . Use proper pruning techniques , such as pruning outside the ridge of the ramification bark and .leaving a collar of woodwind instrument that can heal .

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