Course Content
TERMS AND CONCEPTS USED IN PLANT PATHOLOGY
0/1
CLASSIFICATION OF FUNGICIDES BASED ON CHEMICAL NATURE
0/2
CLASSIFICATION OF FUNGICIDES BASED ON METHOD OF APPLICATION
0/1
Learn introduction to plant pathology with Braimy – B.sc Agriculture
About Lesson

 

Soil inhabitants

Soil invaders / Root inhabiting fungi

1. These are unspecialized parasites with a wide host range that are able to survive indefinitely in the soil as saprophytes.

1. These are more specialized parasites that survive in soils in close association with their hosts.

2. Soil inhabitants include obligate saprophytes and facultative parasites, they are exo-pathogens.

2. Soil invaders include facultative saprophytes which are endo-pathogens (root infecting fungi).

3. Soil and plant debris serve as media for their saprophytic survival.

3. The active saprophytic phase remains as long as the host tissue in which they were living as parasites is not completely decomposed.

4. They have high competitive saprophytic survival ability.

4. They have low competitive saprophytic survival ability.

5. Species of Pythium, Rhizoctonia,Sclerotium, etc., survive as soil inhabitor considerable length of time in absence of the host.

5. Most plant pathogenic fungi and bacteria are soil invaders. Many tants vascular wilt causing species of Fusarium,Verticillium, etc., are soil invaders.

Join the conversation