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Phytophthora capsici is an oomycete plant pathogen that causes blight and fruit rot of peppers and other important commercial crops.It was first described by L. Leonian at the New Mexico State University Agricultural Experiment Station in Las Cruces in 1922 on a crop of chili peppers.
Once a plant is infected, the bacteria spread through the xylem vessels from the area of infection to the main stem, and the entire plant wilts and dies. Initial symptoms may include the wilting of single leaves and smaller stems. Infected plants may produce a creamy white bacterial ooze when cut.
Fusarium wilt Fusarium oxysporum f.sp. capsici. Gray leaf spot Stemphylium solani Stemphylium lycopersici. Gray mold Botrytis cinerea. Phytophthora blight Phytophthora capsici. Powdery mildew Oidiopsis sicula Oidiopsis taurica [synanamorph] Leveillula taurica [teleomorph] Southern blight Sclerotium rolfsii Athelia rolfsii [teleomorph ...
It colonises the xylem, causing bacterial wilt in a very wide range of potential host plants. It is known as Granville wilt when it occurs in tobacco. Bacterial wilts of tomato, pepper, eggplant, and Irish potato caused by R. solanacearum were among the first diseases that Erwin Frink Smith proved to be caused
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.
Pepper infected with Tomato spotted wilt virus. Plant of Pimiento L sweet pepper. Early symptoms of infection are difficult to diagnose. In young infected plants the characteristic symptoms consist of inward cupping of leaves and leaves that develop a bronze cast followed by dark spots.
The virus is widespread and is found almost anywhere peppers are grown, this is because the virus is most often introduced with the pepper seed. The virus moves long distances on the seed and moves short distances via plant-to-plant contact, handling of plants by contaminated implements and workers aids in the spread of the virus. [9]
Impatiens necrotic spot orthotospovirus (INSV) is a plant pathogenic virus of the order Bunyavirales. It was originally believed to be another strain of Tomato spotted wilt virus, but genetic investigations revealed them to be separate viruses.