Pyrenochaeta lycopersici is a fungal plant pathogen, infecting tomatoes and causing corky root rot.

The most susceptible host to Pyrenochaeta lycopersici is tomato, but the pathogen can also infect and cause damage to members of the families of Solanaceae and Cucurbitaceae such as pepper, eggplant, cucumber and melon.

[1][2] Wilt, stunting and lack of vigor can be observed as the primary symptoms, and infected leaves can possibly show interveinal chlorosis that leads to premature defoliation.

[2] Once the infection progresses, these lesions become wrinkled and dark brown, making cracks that prevent hosts from acquiring nutrients and water.

[3][6] These microsclerotia can survive under harsh environments such as temperature changes and drought, and they can maintain the ability to infect other hosts in the soil for up to 15 years.