37+ Magnolia Leaf Spot Fungus. Banner maxx at 5 to 8 fl oz/100 gal water. Have been found by the osu plant clinic.
Department of agriculture plant hardiness zones 5 through 9. It is one of the most destructive tomato plant diseases and affects a wide range of other vegetables and garden plants as well. The leaves of deciduous magnolia trees naturally turn brown and fall every autumn.
Fungal leaf spot disease may be responsible for this condition.
While various types of fungi can infect magnolia trees, phyllosticta, septoria and coniothyrium are the most common among others. These trees are susceptible to various problems and diseases. Leaf spots rarely require chemical controls. These infected areas start to turn yellow and die before long and gives the appearance that your lawn is not being watered enough.