Until the Irish Great Famine of 1845-1852, the commonest cause of disease in potatoes was not the mould that causes blight but a virus.

F. graminearum can also cause root rot and seedling blight.

It causes seedling blight, leaf spot, blackarm (on stem and petioles) and boll rot.

In eastern Pennsylvania, heavy rain caused blight and rot in potato crops and delayed winter wheat seeding.

Alternaria alternata - Causes early blight of potato, Leaf spot disease in Withania somnifera and can infest many other plants.

Some protists are significant pathogens of both animals and plants; for example Plasmodium falciparum, which causes malaria in humans, and Phytophthora infestans, which causes late blight in potatoes.

However, when weather conditions, insect damage, and the appropriate fungal and plant genotype are present, it can cause seedling blight, stalk rot, and ear rot.

Tomato (Solanum lycopersicum): P. capsici can cause crown infections, leaf spot, and foliar blight in tomato.

Apiospora montagnei is a plant pathogen that causes kernal blight on barley but is more often seen aa saprophyte or secondary invader of many other plant species.

Wheat mildew is a wheat disease that affects the ear, and is brought on by causes somewhat similar to those that cause blight, though at a more advanced period of the season.