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Rust, common corn Puccinia sorghi: Rust, southern corn Puccinia polysora: Rust, tropical corn Physopella pallescens. Physopella zeae = Angiopsora zeae. Sclerotium ear rot Southern blight Athelia rolfsii: Seed rot-seedling blight Athelia rolfsii. Bipolaris sorokiniana Bipolaris zeicola = Helminthosporium carbonum Diplodia maydis Exserohilum ...
Phyllachora maydis is a plant pathogen causing ascomycete diseases in maize/corn, and is more commonly referred to as tar spot. [1] [2] Identified by the distinctive development of stroma, this pathogen in itself is of little economic importance in the production of corn.
If infection of the shank occurs early enough the ear may be killed prematurely which causes the ear to drop. SCLB affected kernels will be covered in a felty, black mold, which may cause cob rot. [1] Ear rot is more extensive with Race T on T-cms corn. [8] Seedlings that become infected may wilt and die within a view weeks of the planting date ...
The infection causes the corn kernels to swell up into tumor-like galls, wherein the tissues, texture, and developmental pattern are mushroom-like. The galls grow to 4 to 5 inches in diameter. These galls are made up of hypertrophied cells of the infected plant, along with resulting fungal threads and blue-black spores. [14]
Because of their shape, corns intensify the pressure at the tip and can cause deep tissue damage and ulceration. [2] Hard corns are especially problematic for people with insensitive skin due to damaged nerves (e.g., in people with diabetes mellitus), as they more readily become infected and potentially lead to gangrene. In others they may ...
E. turcicum causes disease and reduces yield in corn primarily by creating the necrotic lesions and reducing available leaf area for photosynthesis. [5] Following conidia germination, the fungus forms an appressorium, which penetrates the corn leaf cell directly using an infection hypha. Once below the cuticle, the infection hypha produces ...
Occasionally the infected areas have a reddish tinge. [3] Some authorities [3] make a distinction between "black point" and "smudge". For them the disease is "black point" from initial infection until more than half of the kernel is infected, or when the disease has entered into the seed's crease. [3]
[2] [16] In sweet corn, reflective mulches can be an effective way to control D. maidis and the disease it vectors, compared to insecticides. [17] Mulching should be performed early in the plant's development to properly control this disease, as greater damage happens if the plant host is younger when infected with corn stunt disease.