What are plant diseases?

Plant diseases can be broadly classified according to the nature of their primary causal agent, either infectious or noninfectious. Infectious plant diseases are caused by a pathogenic organism such as a fungus, bacterium, mycoplasma, virus, viroid, nematode, or parasitic flowering plant.

What is plant disease and example?

Plant Disease. Pathogens and Cycles. Common Soybean Diseases. Frogeye Leaf Spot and Blight. Phytophthora Root and Stem Rot.

What are the common plant diseases?

Leaves develop individual spots, which eventually coalesce and kill the leaf. Once a leaf falls, filled with infection, it slowly rots and infects the rest of the plant. Gather and destroy any leaves that fall as a result of leaf spot diseases. When rain stops and plants dry out, they will usually outgrow the symptoms.

What are the main causes of plant diseases?

Most plant diseases – around 85 percent – are caused by fungal or fungal-like organisms. However, other serious diseases of food and feed crops are caused by viral and bacterial organisms. Certain nematodes also cause plant disease.

What is plant disease cycle?

Plant disease cycles represent pathogen biology as a series of interconnected stages of development including dormancy, reproduction, dispersal, and pathogenesis. The progression through these stages is determined by a continuous sequence of interactions among host, pathogen, and environment.

What does plant disease look like?

When disease attacks a plant, it’s easily visible. Growth slows, stunts or becomes spindly; leaves may yellow, show white powdery blotches or develop spots. Affected leaves eventually drop. Stems may become soft and mushy, with black tissue visible near the soil.

What is plant fungus?

Fungi constitute the largest number of plant pathogens and are responsible for a range of serious plant diseases. Most vegetable diseases are caused by fungi. They damage plants by killing cells and/or causing plant stress. Sources of fungal infections are infected seed, soil, crop debris, nearby crops and weeds.

How do you identify plant diseases?

Diseased plants can be identified by abnormal growth or by signs of the disease-causing organism, such as bacterial slime (an external sign of a disease called bacterial wet wood) or insect larvae which hatches from eggs and feeds on leaves.

How do you treat plant diseases?

Properly space the plants at the time of planting. Cut off any infected leaves. Then spray the leaves with a mixture of milk and water (around 17 ounces of milk and one gallon of water) each week. The leaves and stem wilt, turn yellow, and dry out.

How do I know if my plant is diseased?

Disease Symptoms: What To Watch For When disease attacks a plant, it’s easily visible. Growth slows, stunts or becomes spindly; leaves may yellow, show white powdery blotches or develop spots. Affected leaves eventually drop. Stems may become soft and mushy, with black tissue visible near the soil.

How do you get rid of leaf fungus?

Make a typical baking soda spray by dissolving 1 teaspoon of baking soda into one quart of water. You can add a few drops of insecticidal soap or liquid soap to help the solution spread and stick to the leaves. Only use liquid soap, like Ivory, and not laundry detergent.

What are the signs of plant disease?

Symptoms of viral diseases. Plant pathogenic viruses cause a wide range of symptoms, including: stunting, dwarfing, yellowing or chlorosis, ring spots, vein banding, flower breaks, browning or necrosis, rugosity or swelling on leaves, leaf rolling, stem pitting, and bumps or enations on leaves.

What are the main diseases found in plants?

10 Common Plant Diseases (and How to Treat Them) Powdery Mildew. Problem: Powdery mildew leaves a telltale white dusty coating on leaves, stems and flowers. Downy Mildew. Black Spot. Mosaic Virus. Damping-Off Disease. Fusarium Wilt. Verticillium Wilt. Sooty Mold. Snow Mold. Rust

What can we do about plant diseases?

Top 5 Ways To Prevent Or Stop Plant Diseases In Your Organic Garden Focus On Soil Health (Prevention) Stop Powdery Mildew on Squash, Pumpkins, Cukes, and Other Cucurbits Prevent or Stop Tomato Foliar Diseases Proper Irrigation Methods Don’t Touch and Spread!

What are the principles of plant disease management?

Principles of Plant Disease Management is intended to provide a substantive treatment of plant disease management for graduate and undergraduate students in which theoretical and practical elements are combined. Reference is made to specific diseases and control practices to illustrate basic principles or strategies.