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Stem rust on wheat is characterized by the presence of uredinia on the plant, which are brick-red, elongated, blister-like pustules that are easily shaken off. They most frequently occur on the leaf sheaths, but are also found on stems , leaves , glumes and awns .
Some rust species form perennial systemic infections that may cause plant deformities such as growth retardation, witch's broom, stem canker, galls, or hypertrophy of affected plant parts. Rusts get their name because they are most commonly observed as deposits of powdery rust -coloured or brown spores on plant surfaces.
Ug99 is a lineage of wheat stem rust (Puccinia graminis f. sp. tritici), which is present in wheat fields in several countries in Africa and the Middle East and is predicted to spread rapidly through these regions and possibly further afield, potentially causing a wheat production disaster that would affect food security worldwide. [1]
Stem rust = black rust Puccinia graminis. Puccinia graminis f.sp. tritici (Ug99) Storage molds Aspergillus spp. Penicillium spp. and others; Stripe rust = yellow rust Puccinia striiformis; Uredo glumarum [anamorph] Take-all Gaeumannomyces graminis var. tritici; Gaeumannomyces graminis var. avenae; Tan spot = yellow leaf spot, red smudge ...
Poria root rot and stem canker Poria hypobrunnea. Purple root rot Helicobasidium compactum. Red leaf spot Phoma theicola. Red root rot Ganoderma philippii Poria hypolateritia [1] = Ceriporiopsis hypolateritia [1] Red rust (alga) [2] Cephaleuros virescens = Cephaleuros parasiticus. Rim blight Cladosporium sp. Root rot Cylindrocarpon tenue ...
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Barberry was known as an alternate host of the closely related stem rust (Puccinia graminis) and for many years, when infection was observed on barberry, it was assumed to be stem rust. [4] Then P. striiformis was accidentally discovered to also have the same alternate host when scientists observed rust infection on various barberry species ...
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