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.
Common rust, caused by Puccinia sorghi, can be a yield-limiting disease of sweet corn. Sweet corn yield is reduced about 6% for each 10% rust severity (leaf area infected) at harvest (Figure 1).Severity of rust is affected by the growth stage at which plants are first infected, weather, and host resistance.Severe infection must be prevented in order to avoid yield reductions due to rust.weet corn hybrids with compound rust resistance are being developed presently. Prior to 1999, the Rp1-D gene effectively controlled common rust on sweet corn in North America. In 1999 and 2000, a population of P. sorghi that was virulent against the Rp1-D gene occurred in North America.