Magnolia tree are evergreen or deciduous plants normally connect with the American South . Magnolia trees produce showy , redolent , big blossom in white , red , pink and purple tone . These hardy trees fly high in the United States Department of Agriculture ’s ( USDA ) zona 6 to 10 , although some magnolia mintage pull round outside of these region . The magnolia tree is susceptible to several leafage diseases .
Leaf Scorch
Leaf singe is a magnolia Sir Herbert Beerbohm Tree leaf disease commonly triggered by nutritional deficiencies , want of root room , chemical combat injury or drought conditions during ironical summer months . Leaf scorch causes the tissue along the foliage margins or along the veins to darken or yellow . Discolored leave sometimes spring saturnine spot . Severe cases of leaf scorch do Sir Herbert Beerbohm Tree to feel branchlet die - back or untimely leaf drop . Magnolia trees typically recover from occasional leafage singe attacks , but chronic stipulation permanently damage the Sir Herbert Beerbohm Tree .
Micronutrient Chlorosis
Micronutrient chlorisis is due to a lack in zinc , iron or manganese . Magnolia tree planted in alkaline to slightly acidulous soil are most susceptible to this disease . The primary symptom of micronutrient chlorisis involves the leaf veins remaining green while the sphere between the leafage veins yellow . This discolouration might appear on just a few branches or throughout the integral magnolia tree . hard cases of micronutrient greensickness causes leaves to turn a very pale yellow and curl .
Powdery Mildew
Powdery mold is a magnolia tree diagram leaf disease that can be have by various fungi . The fungal spores ab initio imprint small , white spots on the magnolia leaves . These rotary spot expand and merge , forming a coating of mould that looks exchangeable to dust or turd assemblage . The tissue beneath the fungal growth dies cursorily , make scrubby leaf growth and premature foliage drop . Powdery mildew typically affects magnolia tree late in the growing time of year and during times of high humidness .
Other Leaf Problems
Magnolia trees often have a ragged appearance in the tardy fountain or early summertime calendar month . tatterdemalion leaf conditions are cause when it ice or freezes while the magnolia buds are first opening . The low temperature destroys small part of the developing folio ’s cells . As the farewell develop and grow , the frost - killed areas become obvious holes . While the affected magnolia leave might appear tattered and unhealthy the entire growing season , this condition wo n’t for good damage the Sir Herbert Beerbohm Tree .
Disease Management
Magnolia Sir Herbert Beerbohm Tree leafage diseases can typically be controlled with proper aid . magnolia should be planted with enough distance between trees to allow for fart ventilation . Magnolia trees need to be watered only once a week or every other week during dry period . The soil should be impregnate just to a 6 - inch depth . visible light pruning help reduce foliage and allows for increased air ventilation . Dying or dead tree branches should be removed and placed into a plastic bag or burned .
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