Plant Diseases - Causes Of Plant Disease

disorders noninfectious viruses plants

Plant diseases can be infectious (transmitted from plant to plant) or noninfectious. Noninfectious diseases are usually referred to as disorders. Common plant disorders are caused by deficiencies in plant nutrients, by waterlogged or polluted soil, and by polluted air. Too little (or too much) water or improper nutrition can cause plants to grow poorly. Plants can also be stressed by weather that is too hot or too cold, by too little or too much light, and by heavy winds. Pollution from automobiles and industry, and the excessive application of herbicides (for weed control) can also cause noninfectious plant disorders.

Infectious plant diseases are caused by pathogens, living microorganisms that infect a plant and deprive it of nutrients. Bacteria, fungi, nematodes, mycoplasmas, viruses and viroids are the living agents that cause plant diseases. Nematodes are the largest of these agents, while viruses and viroids are the smallest. None of these pathogens are visible to the naked eye, but the diseases they cause can be detected by the symptoms of wilting, yellowing, stunting, and abnormal growth patterns.

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User Comments

almost 5 years ago

Edmond Walasi

Plant Diseases - Causes Of Plant Disease

almost 5 years ago

Edmond Walasi

Plant Diseases - Causes Of Plant Disease

over 2 years ago

crop disaeses caused by viruses

almost 6 years ago

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almost 5 years ago

Edmond Walasi

Plant Diseases - Causes Of Plant Disease

over 2 years ago

crop disaeses caused by viruses

almost 3 years ago

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about 6 years ago

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over 8 years ago

material is good but in noninfectious disease add role of farmer in causing diseses.

almost 5 years ago

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Plant Diseases - Causes Of Plant Disease

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about 1 year ago

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about 1 year ago

kudakwash woyo

the information is very valuable ,useful .well explained and straight to the point

about 1 year ago

kudakwash woyo

the information is very valuable ,useful .well explained and straight to the point

over 2 years ago

crop disaeses caused by viruses

over 2 years ago

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about 3 years ago

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almost 5 years ago

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almost 5 years ago

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Thank you very much for your time and acceptance.

almost 6 years ago

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