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Over time, these blister-like bumps can change from brown to black, changing from urediniospores to teliospores. [6] The most common place to find these spores is on the plant leaf, but they can develop on husks, tassels, and stalks as well. P. sorghi has two hosts making it a heteroecious rust. Maize and Oxalis are the two hosts for P. sorghi.
Although an excised corn resembles a barleycorn in shape, the two words 'corn' are unrelated. The word 'corn' for a callus derives from the Latin cornus 'horn', and is related to the Greek keras (whence keratin). The 'corn' of 'barley corn' descends from the Indo-European word for 'grain'. The similarity in form is a historical accident.
[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.
This ear of corn has been infected with Mycosarcoma maydis. The fungus infects all parts of the host plant by invading the ovaries of its host. 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.
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 ...
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.
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.