Some of the mental illnesses that can be associated with the existence of synthetic marijuana abuse can include: 1  Bipolar disorder. 2  Schizophrenia. 3  Posttraumatic stress disorder. 4  Attention-deficit/hyperactivity disorder. 5  Anxiety disorders. 6  Depressive disorders. 7  Oppositional defiant disorder. 8  Conduct disorder.
Corn smut, also known as common smut, is a common disease of sweet corn caused by the fungus Ustilago maydis.This disease rarely kills corn plants, but usually causes the production of smaller ears. Corn smut commonly develops on the tassels, ears, leaves, and shoots of corn as a gall.rystal Floyd. Photo by M. Grabowski. Corn smut, also known as common smut, is a common disease of sweet corn caused by the fungus Ustilago maydis. This disease rarely kills corn plants, but usually causes the production of smaller ears.
Types of Diseases in Corn Plants. The many types of corn diseases are caused by bacteria, viruses, nematodes, fungi and mycoplasms. These are the common causes of diseases in corn crops to watch out for. Throughout the growing season, it is important to maintain a good weed control, fertility and irrigation system.