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Bacterial blight of cotton is a disease affecting the cotton plant resulting from infection by Xanthomonas axonopodis pathovar malvacearum (Xcm) a Gram negative, motile rod-shaped, non spore-forming bacterium with a single polar flagellum
1 Bacterial. 2 Fungal. 3 Parastic. 4 Viral. 5 Phytoplasmal. 6 References. Toggle the table of contents. ... This article is a list of diseases of cotton (Gossypium ...
Bacterial seedling blight of rice (Oryza sativa), caused by pathogen Burkholderia plantarii [4] Early blight of potato and tomato, caused by species of the ubiquitous fungal genus Alternaria; Leaf blight of the grasses e.g. Ascochyta species [5] and Alternaria triticina that causes blight in wheat [6]
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Plants become stunted and at times, the whole plant may wilt and die. Dwarfed, bleached tassels are common. 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]
As the pathogen proceeds from the leaf margins towards the veins, water stress and chlorotic symptoms develop due to occlusion of water-conducting vessels by bacterial exopolysaccharides and components of degraded plant cell walls. [1] [6] The darkening of vascular tissues following bacterial invasion gives the black rot disease its name. [2]
Bacterial wilt is a disease of the vascular tissue. When a plant is infected, E. tracheiphila multiplies within the xylem , eventually causing mechanical blockage of the water transport system. The first sign of infection, which appears about five days after acquisition, is the wilting of individual leaves on a single stem.
Other symptoms include stunting, chlorosis or yellowing of the leaves, necrosis or tissue death, and defoliation. Internal vascular tissue discoloration might be visible when the stem is cut. [2] In Verticillium, the symptoms and effects will often only be on the lower or outer parts of plants or will be localized to only a few branches of a ...