Disease monographs are short summaries organized by common plant disease name in alphabetical order. If you have any questions or additional information about a particular disease, please email us at info@earthwiseagriculture.net.

brown rot symptoms on a peach tree

Brown Rot

Monilinia fructicola

Brown rot is one of the most important and devastating diseases of stone fruit.

Early blight symptoms on tomato fruit

Early Blight

 Alternaria Solani

Early Blight (Alternaria Solani), despite its name, usually causes infection and symptoms on mature plants and plant parts, often after fruit set.

Symptoms of fusarium wilt in tomato plant

Fusarium Wilt

Fusarium Oxysporum

Fusarium wilt is similar symptomatically to Verticillium wilt. Early signs include wilting in the heat of the day and yellowing of lower, older leaves.

Late blight (Phytophthora infestans) infection of  a potato leaflet.

Late Blight

Phytophthora infestans

Late blight is classified as a water mold, not a fungus, and appears on foliage as irregular brown or black spots on top of leaves and stems.

Belly rot of cucumber caused by Rhizoctonia solani


 Rhizoctonia Solani

Rhizoctonia (with Fusarium and Pythium) is a major cause of “damping off” seedling disease. Can cause stem and stolon canker in potatoes, pod rot in peanuts.

crown with wilt symptoms

Verticillium Wilt

Verticillium albo-atrum    Verticillium dahliae

Verticillium wilt is similar symptomatically to Fusarium wilt. Lower leaves develop irregular yellow blotches that eventually turn brown and die.