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As one of the most devastating pathogens of sweet corn, C. carbonum causes Northern leaf spot and ear rot disease [1] while the asexual stage causes Helminthosporium corn leaf spot. [2] Cochliobolus carbonum is pathogenic to all organs of the corn plant including root, stalk, ear, kernel, and sheath. [ 3 ]
It is a pathogen of the maize, causing a disease known as brown spot of maize or brown spot of corn. [1] This species was first labeled in 1910 in India, then again a year later in Illinois. [ 2 ]
Corn grey leaf spot can be an extremely devastating disease as potential yield losses range from 5 to 40 US bushels per acre (440 to 3,480 L/ha). At higher disease levels, even greater losses can result. When a corn plant's ability to store and produce carbohydrates (glucose) in the grain is diminished, yield losses take place.
Small water-soaked lesions, maturing into sunken and brown spots with or without a yellow halo. May show concentric rings with purple margins. Necrotic tissue may fall out to appear shot-holed. Leaf spot on many plants and crops. Septoria: Small brown spots, that turns light tan to white in the centre. Leaf spot on many crops Bipolaris
Northern corn leaf blight. White blast Crown stalk rot Stripe Setosphaeria turcica. Exserohilum turcicum [anamorph] = Helminthosporium turcicum. Northern corn leaf spot. Helminthosporium ear rot (race 1) Cochliobolus carbonum. Bipolaris zeicola [anamorph] = Helminthosporium carbonum. Penicillium ear rot. Blue eye Blue mold Penicillium spp ...
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 ]
5. Low Humidity. Light brown spots scattered across fiddle leaf fig leaves can be caused by dry air. If the brown spots in question have a pox-like look instead of being in a single area of the ...
Spots first appear on the upper surface of lower leaves as faint brown to black pinpoint dots. As the dots enlarge to become brown to dark-brown circular spots, a yellow "halo" generally develops as a border around each spot. This disease is frequently seen as early as June 1 in both North Carolina and Virginia.