WebOct 16, 2013 · Air pollution Certain chemicals such as O3, SO2 and NO2 are released into the air from factories, power plants and automobile exhausts. These chemicals can accumulate in the atmosphere insufficient concentration to cause damage to plants. Ozone damage … WebFeb 6, 2012 · Important Plant Diseases-TurfPythium Blight • Symptoms • Large areas can die in 24-48 hours when conditions favoring pythium blight occur • Round to irregular, dark and water-soaked, greasy or slimy • Sunken patches 6-12 inches wide • Reddish brown areas fade to tan and die • Causes • Several species of Pythium fungi.

Causes of Plant Diseases SpringerLink

WebPlant problems are caused by living organisms, such as fungi, bacteria, viruses, nematodes, insects, mites, and animals. Abiotic disorders are caused by nonliving factors, such as drought stress, sunscald, freeze injury, wind injury, chemical injury, nutrient deficiency, or improper cultural practices, such as overwatering or planting conditions. WebPlant viruses can cause major crop losses and greatly reduce quality and storage or products (vegetable/ornamentals and grains). Viruses can remain dormant and express when plants are unhealthy or stressed. They can join with other pathogens and plant viruses to form disease complexes that can decimate crops. da beef rifle co

Signs and symptoms of plant disease: Is it fungal, viral or bacterial ...

WebDAV College For Girls, Yamunanagar WebOct 29, 2001 · In humans, the flu virus an d streptococcal bacteria cause infectious diseases, and they spread from person to person. In contrast, non-infectious (abiotic) … Websimple way to define a plant disease is a change in the host plant that causes abnormal growth or a disruption of normal plant function. Diseases may be biotic (living) or abiotic (nonliving). Diseases are among the most important factors that significantly diminish growth and yield. In addition to a reduction in growth, yield, and the economic or bing universal credit login