Animals are not typically considered plant pathogens as they do not cause diseases directly to plants. Instead, they may act as vectors, transmitting pathogens from one plant to another.

Resistance refers to a plant's ability to actively defend itself against a pathogen, preventing or minimizing infection and disease development.

Powdery mildew is a common fungal disease that affects a wide range of plants. It is characterized by a white or gray powdery growth on the leaves and stems.

Infection refers to the process by which a pathogen successfully enters and establishes itself within a plant host, initiating the disease process.

Vaccination is not typically used as a disease management strategy in plant pathology. Instead, methods such as chemical control, biological control, cultural practices, and genetic engineering are commonly employed.

Symptoms are the visible or detectable signs of a plant disease, such as wilting, yellowing of leaves, or the presence of lesions or spots.

Bacterial wilt is a common disease caused by bacteria that infect the vascular system of plants, leading to wilting and eventual death.

The disease cycle refers to the sequence of events in which a pathogen infects a plant, multiplies, and spreads, leading to the development of disease symptoms.

Drought stress is not a plant disease but a physiological condition caused by a lack of water. It can lead to wilting, yellowing of leaves, and reduced plant growth.

Pathogenicity refers to the ability of a pathogen to cause disease in a plant, including its ability to infect, multiply, and spread within the host.

Human activities are not typically considered a common method of disease dispersal in plant pathology. Instead, natural factors such as wind, water, insects, and animals are the primary means of pathogen dispersal.

The disease triangle refers to the relationship between a pathogen, a host plant, and the environment in the context of plant disease. It illustrates the factors that contribute to the development and severity of a disease.

Nutrient deficiency is not a plant disease but a physiological condition caused by a lack of essential nutrients. It can lead to yellowing of leaves, stunted growth, and reduced yields.

Disease severity refers to the degree of damage or loss caused by a plant disease, including the extent of tissue damage, yield reduction, or economic impact.

Fertilization is not typically considered a common method of disease prevention in plant pathology. Instead, methods such as crop rotation, resistant varieties, sanitation, and chemical control are commonly employed.