The beautiful lawn can be quickly destroyed by brown patch or large patch, which are serious fungal diseases (each caused by different strains of Rhizoctonia solani). Disease can develop rapidly when daytime temperatures are warm (75 to 90 °F) and humid, nighttime temperatures

Leaf spot diseases affect the foliage of ornamentals and shade trees especially during the rainy season. The majority of leaf spots are caused by fungi, but some are caused by bacteria. The spots vary in size and color depending on the plant