What are the 5 plant diseases?
Fungal Diseases: Black spot, Rust, Botrytis blight, Powdery mildew. Bacterial Diseases: Black rot, Bacterial canker, Soft rot, Leaf spot wilt, Blight. Common plant diseases include fungal diseases, bacterial diseases, and viral diseases. Fungal Diseases: Black spot, Rust, Botrytis blight, Powdery mildew. Bacterial Diseases: Black rot, Bacterial canker, Soft rot, Leaf spot wilt, Blight.Fungi and Fungal-like Organisms (FLOs) Collectively, fungi and FLOs cause the most plant disease than any other group of plant pathogens. These organisms cannot make their own food, lack chlorophyll, have filamentous growth, and may or may not reproduce by spores.Fungal diseases are the most common infection in plants. There are some characteristic symptoms, or observable effects of the disease, in plants. Fungi infections can be recognized by symptoms like spots on plant leaves, yellowing of leaves, and birds-eye spots on berries.Pathogens include fungi, bacteria, nematodes, and viruses, all biological organisms that can cause disease symptoms and significantly reduce the productivity, quality, and even cause the death of plants.
What are two main causes of plant disease?
Infectious plant diseases are mainly caused by pathogenic organisms such as fungi, bacteria, viruses, protozoa, as well as insects and parasitic plants [1]. With the development of agriculture, infectious plant diseases have become an increasingly significant factor affecting crop yield and economic efficiency. These three are the virulent pathogen (one that can cause disease), a susceptible host (plant) and suitable environmental conditions. Figure 1. Disease Triangle. The three factors that have to coexist are presence of a pathogen, proper greenhouse environment for disease development and a susceptible host plant.
What are the three symptoms of plant disease?
Symptoms include chlorosis, necrotic spotting, marginal scorch, twisting, growth abnormalities, leaf or needle drop, dieback, general decline, and plant death. As with environmental factors, cultural factors can affect plant health in many ways and result in a wide range of symptoms. COMMON SYMPTOMS OF PLANT DISEASE: Leaf spot: dead, discolored, or injured areas of tissue that usually have distinct margins; spots often appear on leaves or fruit. Blight: rapid yellowing, browning, collapse, and death of leaves, shoots, stems, flowers, or the entire plant.How can you tell if a plant is diseased? There are several signs that can indicate a plant is diseased, including changes in leaf color, shape, or texture; wilting or yellowing of leaves; and the presence of spots, blotches, or lesions on the plant.A symptom is a change in plant growth or appearance that may indicate or describe a plant health problem. Examples of symptoms include yellowing, wilting, dieback, galls or blight.