Events in Disease Cycle

Question 1

Primary Events in the Disease Cycle

Answer 1

) Inoculation
ii) Penetration
iii) Establishment of the infection
iv) Colonization (invasion)
v) Growth and reproduction of the pathogen
vi) Dissemination of the pathogen
vii) Survival of the pathogen in the absence of the host i.e.
overwintering and over-summering (over-seasoning) of
the pathogen

Question 2

The inoculum that survives dormant in the
winter or summer and brings about original infections in the spring and autumn is called primary inoculum, and the infections it causes are called primary infections.

Answer 2

Primary Inoculation

Question 3

The inoculum produced from primary infections and in turn causes secondary infections.

Answer 3

econdary inoculums

Question 4

chemotaxis

Answer 4

attracted to the host plant by chemical substances like sugars and amino acids diffusing out of the plant roots