Pathogen Survival and Dissemination Quiz

Seed-borne pathogens can only survive in infected soil and plant parts.

Crop monoculture leads to lower disease severity and yield losses.

Systemic fungicides act on plant surfaces to protect against infection.

Seed treatments can control soil-borne pathogens but not surface-borne or internally-borne pathogens.

Fungicide selection should not consider the growth stage of the crop for efficacy.

According to Integrated Pest Management principles, growers should integrate as many different management tools as possible for long term success.

Necrotic refers to tissue that is dead and discolored.

Spores are the reproductive units of bacteria.

Mycelium refers to the fruiting bodies of fungi.

Viruses are single-celled organisms with a protein coat.

Mycoplasmas have a definite shape and a cell wall.

Polycyclic pathogens only have one disease cycle in one year.

Non-infectious diseases are caused by living parasitic organisms.

Excessive water can lead to deficiency and stunting in plants.

Frost damage is an example of a non-infectious disease.

Infectious diseases are caused by organisms that get their nutrition from the plants.

Obligate parasites can live on living or non-living hosts.

Facultative parasites are always parasites and can only live on living hosts.

Crop sequence is not important in disease management programs.

Variety selection does not play a role in resistance to diseases.

Inoculum-free seed/plant source is not a factor to consider in disease management programs.

Timeliness of harvest has no impact on seed inoculum.

Weed control does not contribute to disease management.

Inoculum refers to the material that causes infection in plants.

Crop rotation is not beneficial for managing diseases.