List of top Agricultural Science Questions on Plant Pathology

The classification of fungi is based mainly on

Red rot disease of sugarcane is caused by

Match the LIST-I with LIST-II. LIST-I: A. Loose smut, B. Karnal bunt, C. Powdery Mildew, D. Leaf rust. LIST-II: I. Erysiphe graminis tritici, II. Puccinia recondita tritici, III. Tilletia indica, IV. Ustilago nuda tritici.

Which of the following is an example of polycyclic pathogen? A. Pythium species, B. Phytophthora infestans, C. Ustilago hordei, D. Ustilago segetum tritici.

Arrange the sequence of events occurring in plant disease cycle. A. Disease development and spread, B. Inoculum, C. Latent phase, D. Infection on plant, E. Appearance of symptoms.

The term virus was coined by:

A disease occurring severely and confined to small locality area is:

In case of resistance, the rate of reproduction of a plant pathogen will be:

Given below are two statements:
Assertion (A): Horizontal resistance is durable as it is non-race specific.
Reason (R): Race specific resistance puts pressure on the pathogen to evolve more virulent races.

Important characteristics of phytopathogenic bacteria are- A. They are saprophytes
B. They do not infect animals
C. They are invariably rod-shaped and flagellate
D. All are Gram -ve

Match the LIST-I with LIST-II and choose the correct answer from the options given below: \[ \begin{array}{|l|l|} \hline \textbf{LIST I (Common powdery mildews)} & \textbf{LIST II (Causal organism)} \\ \hline A.\ \text{Powdery mildews of barley} & I.\ \text{Cercosphaera leucotricha} \\ B.\ \text{Powdery mildews of peas} & II.\ \text{Uncinula necator} \\ C.\ \text{Powdery mildews of grape vines} & III.\ \text{Erysiphe polygoni} \\ D.\ \text{Powdery mildews of apple} & IV.\ \text{Erysiphe graminis var. hordei} \\ \hline \end{array} \]

The Irish potato famine that occurred in North Europe during 1845 was caused by-