Question

A widely but periodically occurring plant disease is said to be
A. Endemic
B. Epidemic
C. Sporadic
D. Epiphytotic

Answer 1

Hint: The infectious plant maladies are caused by living (biotic) factors or pathogens. These pathogens can be spread from a contaminated plant or decomposed plant to a solid plant. Microorganisms that cause plant infections to incorporate are bacteria, fungi, nematodes and mycoplasmas.

Complete answer:
Endemic maladies: When the infection is displayed in a specific nation or district. Epidemic malady: This malady happens broadly, but occasionally in a dangerous frame. The pathogen may be displayed as in endemic maladies, but the natural variables mindful for the advancement of the illness happen as it were periodically. Sporadic illness: They have a place in the scourge bunch. The term is connected to those illnesses that happen at exceptionally sporadic interims and areas and in moderately fewer occasions. Pathogens such as microbes, organisms, infections are dependable for various sort of plant maladies and the thought about infections in plant populaces is known as plant malady the study of disease transmission. They are classified on the premise of the mode of disease, side effects, plant, the organ they assault, event and dispersion. Epiphytotic is classified concurrent to event and conveyance which is characterized as a malady that happens intermittently in serve shape including a major region of trim. e.g. Rust, Late blight

Hence, the correct answer is option (D).

Note: Pandemic diseases: Widespread flare-up is a plague which happens over tremendous and broad ranges causing extreme misfortunes. These happen all over the world and result in mass mortality. Epiphytotics may happen in cycles. When a plant malady to begin with shows up in a modern range, it may develop quickly to epiphytotic extents. In time, the malady melts away, and, unless they have species has been totally wiped out, the illness dies down to a moo level of rate and gets to be epiphytotic.