Magnolia tree are large , ornamental shade trees that provide the garden with clusters of clean , pink or ruddy flowers in the spring . During the summertime , they have thick , glossy - unripened leaves , and when you notice white gunpowder on them , it is significant to take action at once . Magnolia Tree are among the trees most susceptible to powdery mildew , and to see the tree ’s wellness , powdery mold should be treated right aside .
Step 1
Powdery mould look as a white or grayish - blank powder that covers the top surface of the magnolia leaf , though it might also affect the root word and the flowers . Though it can be well brushed away , it quickly becomes prevailing enough that this is not an pick . As the powdery mold infests the magnolia tree , the leaves become twisted and warped , turning yellowed or brown . A grave infection of powdery mildew can cause leaf drop and prevent the bud from gap . The character of fungus that causes powdery mold on magnolia does not affect trees other than magnolias .
Time Frame
Powdery mildew is typically most obvious during the late summertime and the early declination . During the wintertime , powdery mildew takes the var. of tiny black spheres which bunch in prow , in dormant buds and in the leafage bedding on the earth . When the days are growing warmer but the Nox are still cool , they begin to infect and spread throughout the magnolia tree diagram .
Step 2
Prevention
Practice expert garden sanitation to prevent powdery mould from taking a hold in your garden . Do not set aside leaf bedding material to sit on the ground over the wintertime , and do not use leaf bedding material as a compost or a mulch , especially if there has been powdery mould in the year before . Give your magnolia plenty of space to spread , so that it does not easy pick up fungi from other tree . Check the gap of the mature magnolia that you are planting and give it at least that much space .
Solution
Prune out any affected shoots that show powdery mildew , taking care to dispose of them off from your holding . When the infection is severe , use a chemical fungicide that is approved for your area . A fungicide will vote out the powdery mildew , but you should spray the full tree diagram , not just the affected expanse . Spray every one to two workweek to keep young magnolia fully covered and protect from the powdery mildew .
