![]() ![]() Vine weevils usually start to damage the leaves around spring and summer. I do not recommend using chemical control, as this isn’t a reliable method in controlling bacterial blight, nor will the chemicals be healthy for the tree in the long run.However, if you have holes in the leaves it is the adult beetles that crawl up the plant at night to feed, leaving behind devastated leaves with holes in them or edges that have been eaten away. Isolate all affected leaves and burn them to avoid them from spreading anywhere else in the garden. Make sure that the pruning tools used are disinfected with fungicides to make sure there aren’t any infectious diseases spread in the equipment. You can prevent this disease from spreading with proper pruning tools and pruning your tree during the dry seasons for better airflow between its branches. You will know if it’s leaf blight when there is a thread-like appearance under the leaves, and affected leaves look matted, sticking together. Leaf blight is probably one of the most common diseases of Magnolia trees, a fungus disease that usually attacks them when they are young. You can also hose down the tree to wash the fungus away. You can have predatory insects around to feed on the pests naturally, and also apply neem oil thoroughly on the Magnolia tree to chemically control the pests.Īfter the pests are gone, the sooty mold goes away. The sooty mold would rarely threaten the life of Magnolia trees, only if the growth has covered the entire leaves, blocking the sunlight required for photosynthesis.īefore you can get rid of sooty mold, you’ll need to deal with the pests that secrete honeydew. This is a sticky substance, causing a black and velvet-lick fungus to grow, which is known as sooty mold. When the Magnolia tree is infested with pests like aphids, mealybugs, or spider mites, it would secrete honeydew over the leaves and tree stems. Make sure that you separate all the affected leaves from the affected tree, as well as other plants and trees around it.Īlso, you should take preventative measures such as ensuring your plants have proper space between one another for better air circulation and to avoid excessive watering to keep away any fungus from attacking your Magnolia tree. What you can do to treat powdery mildew is by applying fungicide like horticultural oil, neem oil, or potassium bicarbonate. Unlike other fungal diseases, moisture isn’t required for the fungus to grow. Too much shade and mild temperatures of 60-80 degrees would promote the growth of powdery mildew. It would appear as a fuzzy or powdery white growth on branches and leaves, causing the foliage to discolor, eventually wilting and falling off branches. This is a contagious fungal disease that would infect a lot of plants like the Magnolia trees. You should plant Magnolia trees in disease-free soil to prevent the chance of this fungal disease and sterilize the soil before planting using solarization to kill any pathogens that live on top of the soil. Unfortunately, there isn’t accepted fungicide control that can treat verticillium wilt, though you can try cultural control to prevent the damaging fungal disease from further attacking the tree. Verticillium wilt isn’t present in cooler temperatures, with the first signs of this disease unnoticeable until the weather begins to warm. The infected leaves will then wilt, die, and fall from the tree prematurely. It would show if you see any yellowing on the tree’s leaf margins and between the veins. This is a fungal disease that would begin at the tops of the leaves, working its way towards tree branches. Furthermore, keep the ground around and under the Magnolia tree free from any fallen plant matter to prevent infestations and problems like these. You can treat it by providing better ventilation to the tree, pruning it regularly, as well as spraying the tree using multidimensional fungicides. Usually, your tree can tolerate the disease as long as it’s healthy. They may also cause brown or yellow irregular discolorations on the leaves, with some of the leaves falling from their branches prematurely. ![]() These like wet conditions and you will know if your tree has it if its leaves have tiny purplish or black spots with a white center and purple edges as it matures. Lead spot diseases are caused by various fungi and bacteria called the Pseudomonas. Here are the different fungal problems to learn about and how you can treat it: 1. The treatment done for fungus depends on the condition it suffers from. It may also fall victim to fungal issues. Just like many other plants and trees, Magnolia trees are usually attacked by various diseases and pest infections. How Do You Treat Fungus on a Magnolia Tree? ![]()
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