The magnolia sept consist of a combination of evergreen plant and deciduous Tree and shrub . These trees are hardy and showy trees that thrive in well - drained locations with full sunlight . With more than 80 species , there is a magnolia that can thrive in every maturate zone . These trees are somewhat pest and disease repellent . However , magnolia Tree are susceptible to several bark disease .

Nectria Canker

Nectria canker is a fungal disease that penetrates the wood of magnolia trees . Transported by fungal spores , this canker disease infects the tree diagram through its wounds . The point of infection develops an elongated wound and the barque becomes discolored . patterned advance of the disease outcome in the development of barque canker sore and callus , as well as growth stunt and dieback of branches , stems and foliage . stress magnolia trees are specially vulnerable to this disease . There is no cure or treatment for this canker disease . The disease can be insure by pruning aside the infected areas . badly infected magnolias should be take and destroyed .

Wetwood

Wetwood , also look up to as slime flux , is a disease that is have by a collection of bacterium . Like many tree diagram disease , wetwood infect the magnolia tree through open wounds and natural openings . This bacterial transmission causes the septic wood to become water - dowse with bacterial guck . This ooze ooze through the septic forest , causing the barque to discolor , scissure and decay . The ooze emits a foul , rancid odor , along with a gaseous release , and will obliterate surrounding vegetation upon contact . Wetwood can not be bring around with bacteriacide treatments .

Armillaria Root Rot

Armillaria root rot , or shoe string root word rot , is a filth - borne fungal disease . This disease infect weakened and stressed magnolia , such as those that are drought stressed , hoar injured or previously diseased or overrun . Entering through the tree ’s origin arrangement , armillaria root rot causes the disintegration of the tree ’s mulct , feeder roots while make the rapid decay of the tree ’s Sir Henry Wood and barque . septic magnolia Sir Herbert Beerbohm Tree will also experience yellowing of foliation , dieback and increment stunt of branch and premature defoliation . Severely infected magnolia Sir Herbert Beerbohm Tree will also ooze a liquidness from their torso . The trunk of the infected tree will germinate yellow- to whitened - bleached fungal deposits and mushroom . While there is no cure for an septic tree , the disease can be keep by maintain a vigorously get tree . antifungal treatments are effective in subdue the magnolia ’s susceptibleness to this disease .

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