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Northern corn leaf blight (NCLB) or Turcicum leaf blight (TLB) is a foliar disease of corn caused by Exserohilum turcicum, the anamorph of the ascomycete Setosphaeria turcica. With its characteristic cigar-shaped lesions, this disease can cause significant yield loss in susceptible corn hybrids.
Southern corn leaf blight (SCLB) is a fungal disease of maize caused by the plant pathogen Bipolaris maydis (also known as Cochliobolus heterostrophus in its teleomorph state). The fungus is an Ascomycete and can use conidia or ascospores to infect. [ 1 ]
Cercospora zeae-maydis on corn. Grey leaf spot (GLS) is a foliar fungal disease that affects maize, also known as corn. GLS is considered one of the most significant yield-limiting diseases of corn worldwide. [1] There are two fungal pathogens that cause GLS: Cercospora zeae-maydis and Cercospora zeina.
Cochliobolus, although not currently the most economically serious disease, can be a very serious crop disease. C. heterostrophus (race O) was considered a mild pathogen of corn, and was of little worry to those growing maize crops. It was not until the 1970s that C. heterostrophus (race T) destroyed more than 15% of the U.S. corn crop. Race T ...
Accordingly, many diseases that primarily exhibit this symptom are called blights. Several notable examples are: [citation needed] Late blight of potato, caused by the water mold Phytophthora infestans (Mont.) de Bary, the disease which led to the Great Irish Famine; Southern corn leaf blight, caused by the fungus Cochliobolus heterostrophus ...
[2] Corn anthracnose leaf blight is the most common stalk disease in maize and occurs most frequently in reduced-till or no-till fields. [3] Anthracnose stalk rot. Symptoms can vary depending on which part of the growing season the corn is in. [4] Early in the growing season, the main symptom is foliar leaf blight.
Symptoms can overlap across causal agents, however differing signs and symptoms of certain pathogens can lead to the diagnosis of the type of leaf spot disease. Prolonged wet and humid conditions promote leaf spot disease and most pathogens are spread by wind, splashing rain or irrigation that carry the disease to other leaves.
Often, plants that have wilt symptoms also have leaf blight symptoms. [citation needed] The second, more common phase of the disease is the leaf blight phase, which occurs on the leaves at any vegetative growth stage. [3] At first, the leaf lesions appear long and irregularly shaped and are light green to yellow and later on, straw colored.