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Fusarium wilt is a common vascular wilt fungal disease, exhibiting symptoms similar to Verticillium wilt. This disease has been investigated extensively since the early years of this century. The pathogen that causes Fusarium wilt is Fusarium oxysporum (F. oxysporum). [1] The species is further divided into formae speciales based on host plant.
Fusarium oxysporum f.sp. lycopersici is a fungal plant pathogen. It is a big pathogen to the tomato plant. It has a violet to white color on most media but does not produce a pigment on King's B medium .
Bacterial diseases; Bacterial spot ... Fusarium wilt Fusarium oxysporum f.sp. capsici. ... Tomato spotted wilt genus Tospovirus, ...
Tomato mosaic Tomato mosaic virus Tomato mottle Tomato mottle geminivirus: Tomato necrosis Alfalfa mosaic virus: Tomato spotted wilt Tomato spotted wilt virus: Tomato yellow leaf curl Tomato yellow leaf curl virus: Tomato yellow top Tomato yellow top virus: Tomato bunchy top: Potato spindle tuber viroid [5] Tomato planto macho Tomato planto ...
In tomato plants, the presence of ethylene during the initial stages of infection inhibits disease development, while in later stages of disease development the same hormone will cause greater wilt. Tomato plants are available that have been engineered with resistant genes that will tolerate the fungus while showing significantly lower signs of ...
These diverse and adaptable fungi have been found in soils ranging from the Sonoran Desert, to tropical and temperate forest, grasslands and soils of the tundra. [10] F. oxysporum strains are ubiquitous soil inhabitants that have the ability to exist as saprophytes, and degrade lignin [11] [12] and complex carbohydrates [13] [14] [1] associated with soil debris.
Spores spread to healthy tomato leaves by windblown water, splashing rain, irrigation, mechanical transmission, and through the activities of insects such as beetles, tomato worms, and aphids. [1] Provided the environment is conducive for disease development, lesions usually develop within 5 days of infection.
Fusarium oxysporum is a common soil inhabitant and produces three types of asexual spores: macroconidia, microconidia and chlamydospores. [1]The macroconidia are straight to slightly curved, slender and thin-walled, usually with three or four septa, a foot-shaped basal cell and a tapered and curved apical cell.