primordia. It only becomes visible after head emergence. The teliospores that are formed on systemically infected seeds then infect neighbouring new…
Mycosphaerella fijiensis also known as black sigatoka, is an ascomycete fungus that causes leaf-spot of banana. Life cycle and appearance of Black…
graminea Leaf stripe General Pyrenophora graminea is a disease of Barley that causes significant yield losses. Life cycle and appearance of Leaf…
the closer the temperature is to this, the shorter the leaf wetness period that is required. Inside the plant, the pathogens produce haustoria, small…
blight, leaf and pod spot General Ascochyta pisi is a fungal plant pathogen that causes A scochyta blight on pea (leaf blight or pea blight) and…
roots as microsclerotia. The microsclerotia germinate and produce mycelium that in turn infect the roots of tomato and other hosts. Several alternate…
These spots can be distinguished by the dark and brown concentric rings that are caused by sporulation. Species may differ in specific symptoms. Life
plants die. Also, in many regions there is no overwintering of adult vectors that may cause early infection in the new season. Therefore, the bacteria…
light-brown. The lesions can be enclosed by pseudostromata: dark coloured tissue that looks like black stripes. The disease is usually restricted to a…
foot by overwintering inoculum. On the infected foot, conidia are produced that further spread the disease. Gibberella zeae (Fusarium graminearum )…
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