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Animal and insect vectors are another way in which fungal, bacterial and viral leaf spot diseases are spread. [2] Rainwater spreads pathogens by transporting infested soil into areas that are disease-free. Infested water can also be spread by way of irrigation or transplanting. Blowing rain can also spread fungi and bacteria. [2]
Alternaria leaf spot or Alternaria leaf blight are a group of fungal diseases in plants, that have a variety of hosts. [ 1 ] [ 2 ] [ 3 ] The diseases infects common garden plants, such as cabbage, and are caused by several closely related species of fungi. [ 4 ]
Cabbage clubroot is a disease of Brassicaceae (mustard family or cabbage family) caused by the soil-borne Plasmodiophora brassicae. [9] The disease first appears scattered in fields, but in successive seasons it will infect the entire field, reducing the yield significantly and sometimes resulting in no yield at all.
Leptosphaeria maculans causes phoma stem canker or blackleg. Symptoms generally include basal stem cankers, small grey oval lesions on the leaf tissue and root rot (as the fungus can directly penetrate roots). [3] L. maculans infects a wide variety of Brassica crops including cabbage (Brassica oleracea) and oilseed rape (Brassica napus).
Rhizoctonia solani root rot on corn roots, magnified 0.63X. Damping off can be prevented or controlled in several different ways. Sowing seeds in a sterilized growing medium can be effective, although fungal spores may still be introduced to the medium, either on the seeds themselves or after sowing (in water or on the wind).
The importance of using disease-free seed and/or transplants is highlighted by the fact that "as few as three infected seeds in 10,000 (0.03%) can cause black rot epidemics in a field." [ 6 ] In transplant beds, an initial infection level of 0.5% can rise to 65% in just three weeks. [ 2 ]
The best methods for storing whole, cut, or pre-cut cabbage. The best methods for storing whole, cut, or pre-cut cabbage. Skip to main content. Subscriptions; Animals. Business. Fitness. Food ...
Plant diseases are diseases in plants caused by pathogens (infectious organisms) and environmental conditions (physiological factors). [1] Organisms that cause infectious disease include fungi , oomycetes , bacteria , viruses , viroids , virus -like organisms, phytoplasmas , protozoa , nematodes and parasitic plants . [ 2 ]