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Erysiphe graminis f.sp. tritici is a plant pathogen that causes a fungal infection known as powdery mildew. It is most common in grains, and it can be identified by the characteristic white spots on leaves and stems that appear to be made of powder. Powdery mildew is one of the most widespread and easily recognizable plant diseases.
Curtobacterium flaccumfaciens can overwinter in plant debris, diseased plants, wild hosts, seeds, or vegetative propagative organs. The bacteria can survive only a couple of weeks as free bacteria in soil. Multiple factors go into survival of a bacterial population, including temperature, humidity, and soil characteristics.
It also helps if plants are planted in well-drained soils, at intervals appropriate for adequate ventilation between plants. Few varieties are resistant to the disease and none are immune, so rotating susceptible plants with non-susceptible ones like cereals is a practice positive to limiting soft rot infection.
Clubroot is a common disease of cabbages, broccoli, cauliflower, Brussels sprouts, radishes, turnips, stocks, wallflowers and other plants of the family Brassicaceae (Cruciferae). [1] It is caused by Plasmodiophora brassicae , [ 2 ] which was once considered a slime mold but is now put in the group Phytomyxea . [ 3 ]
The Phytomyxea are a class of parasites that are cosmopolitan, obligate biotrophic protist parasites of plants, diatoms, oomycetes and brown algae. [1] They are divided into the orders Plasmodiophorida ( ICZN , or Plasmodiophoromycota , ICBN ) and Phagomyxida . [ 2 ]
The bacterium can't penetrate the host plant without an entry point such as a wound. Factors leading to wounds in plants include cultural practices, grafting, freezing injury, growth cracks, soil insects, and other animals in the environment causing damage to the plant.
In this work, he gave descriptions of 1900 plants, of which about 1400 were described for the first time. Among these were 900 fungi and lichens , accompanied by 73 plates. He included information on "the planting, origin and growth of fungi, mucors, and allied plants", and was the first to point out that fungi have reproductive bodies or ...
First and foremost, each season should begin as pathogen-free as possible. This can be accomplished by burning or destroying all infected plant tissues to prevent the spread of the primary innoculum. [1] Crop rotation is also encouraged to avoid the re-infection of new foliage from overwintered inoculum.