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Although cotton plant resistance may be to a particular Xcm race, it reveals how the physiological characteristics of plants can effectively aid in plant resistance to diseases and pest attacks. Cloning of the R genes can be used to develop multi genetic resistance. Further research should focus on establishing the relationships between cotton ...
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]
Further investigation of pathogenicity profiles and multilocus sequencing typing suggested that the list could be narrowed down to just three main pathovars with the different symptoms being black rot, leaf spot, and bacterial blight. [8] Both X. campestris pv. campestris (known for causing black rot of crucifers) and X. campestris pv.
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]
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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]
Halo blight of bean is a bacterial disease caused by Pseudomonas syringae pv. phaseolicola. Halo blight’s pathogen is a gram-negative, aerobic, polar-flagellated and non-spore forming bacteria. This bacterial disease was first discovered in the early 1920s, and rapidly became the major disease of beans throughout the world.