Common Diseases of Corn and Their Control: Smut
Karen Meyers Caused by the fungus Ustilago maydis, this disease can affect all above ground parts of the plant but is most economically significant when it attacks the ears. It causes the…
Common Diseases of Corn and Their Control: Sooty Mold
This fungal disease appears as a black powdery coating on leaves and is caused by one of several different sac fungi (Ascomycetes), often Cladosporium and Alternaria. The appearance on corn…
Common Diseases of Corn and Their Control: Rust
The most common corn rust is caused by the fungus Puccinia sorghi and usually appears after tasseling as dark, reddish-brown pustules on the upper and lower surfaces of the leaves.…
Common Diseases of Corn and Their Control: Gray Leaf Spot
Gray leaf spot is one of two common foliar fungal diseases of corn. It is caused by either Cercospora zeae-maydis or Cercospora zeina and appears as grey rectangular, brown to…
Common Diseases of Tomato and Their Control: Early Blight
Early blight of tomato is a fungus disease usually caused by Alternaria solani or the more virulent A. tomatophila, and can also effect potatoes, peppers and other members of the…
Common Diseases of Tomato and Their Control: Anthracnose
Anthracnose is a fungal disease that affects tomato and potato as well as plants in several other plant families including cucumber, onion and bean. The pathogen specific to tomato, Colletotrichum…
Common Diseases of Tomato and Their Control: Septoria Blight
Septoria blight is fungal disease caused by Septoria lycopersici and primarily affects tomatoes but can also infect other members of the nightshade family such as potato and eggplant. The main…
Common Diseases of Tomato and Their Control: Botrytis Gray Mold
Caused by the fungus, Botrytis cinerea, gray mold is responsible for a variety of diseases including damping off and blights. It affects the flowers, fruits, stems and foliage of over…
Common Diseases of Tomato and Their Control: Fusarium Wilt
Caused by one of three races of the fungus Fusarium oxysporum, this warm weather disease affects peppers, eggplant, potatoes, and legumes as well as tomatoes, and survives on weeds such…
Common Diseases of Tomato and their Control: Buckeye Rot
Buckeye Rot of tomato is caused by three species of the soil borne fungus-like water mold, Phytophthora: P. capsici, P. drechsleri, and P. nicotiana var. parasitica. The disease is common…