What are the 4 types of plant pathogens?

The plant pathogens comprise viruses, bacteria, fungi, nematode, and parasitic plant.

What are the 5 classifications of pathogens?

A variety of microorganisms can cause disease. Pathogenic organisms are of five main types: viruses, bacteria, fungi, protozoa, and worms.

What is pathogen classification?

Microbes can be classified into ‘pathogens’, ‘commensals’ which are found in the normal body flora and ‘saprophytes’ which are found in environmental sites such as soil or plants.

How many plant pathogens are there?


Plant pathogenic bacteria (PPB) are important plant pathogens widely spread all over the world (Bar-On et al., 2018). It is estimated that from 7100 classified bacteria about 150 species are responsible for different plant diseases (Rajesh-Kannan et al., 2016).

What are plant pathogens?

A plant pathogen is an organism that causes a disease on a plant. Although relatives of some plant pathogens are human or animal pathogens, most plant pathogens only harm plants. Some plant pathogens can make immune-depressed people sick,however. These are called “trans-kingdom” pathogens.

What are the 7 types of pathogens?

Infectious diseases are caused by pathogens, which include bacteria, fungi, protozoa, worms, viruses, and even infectious proteins called prions.

What is a Class 2 pathogen?

Human pathogens

– Class of risk 2 : micro-organisms that can cause human disease and might be a hazard for directly exposed persons; they are unlikely to spread to the community. There is usually effective prophylaxis or treatment available.

What are pathogens and examples?

Share on Pinterest Bacteria, viruses, and fungi are all types of pathogens. A pathogen brings disease to its host. Another name for a pathogen is an infectious agent, as they cause infections. As with any organism, pathogens prioritize survival and reproduction.

What are the importance of plant pathogens?

Plant pathogens in the wild are potential sources of inoculum, of new biotypes, and of new diseases. Their importance to agriculture depends first on their host range and on the new biotypes they produce. It also depends on the feasibility of coping with these sources.

How are pathogens spread in plants?

Bacteria and fungal spores can be transferred by wind, in rain, and from soil via rain splashing onto plant tissues. Insects can vector or infect a plant with a pathogen when they feed on an infected host plant, and then move and feed on an uninfected plant.

How do pathogens enter plants?

Host-Pathogen Interactions

Bacteria can be sucked into a plant through natural plant openings such as stomata, hydathodes or lenticels. They can enter through abrasions or wounds on leaves, stems or roots or through placement by specific feeding insects.

What pathogen causes most plant disease?

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.

What are the 3 types of causes of plant disease?

Disease Triangle

These three are the virulent pathogen (one that can cause disease), a susceptible host (plant) and suitable environmental conditions.

What are the three types of plant diseases?

  • bacterial.
  • fungal.
  • viral.

What are the five causes of plant diseases?

Infectious plant diseases are mainly caused by pathogenic organisms such as fungi, bacteria, viruses, protozoa, as well as insects and parasitic plants [1].

What are the characteristics of plant pathogenic bacteria?

Plant pathogenic bacteria cause many different kinds of symptoms that include galls and overgrowths, wilts, leaf spots, specks and blights, soft rots, as well as scabs and cankers. In contrast to viruses, which are inside host cells, walled bacteria grow in the spaces between cells and do not invade them.

What does pathogen mean?

A pathogen is usually defined as a microorganism that causes, or can cause, disease.