Q20 of 67 Page 434

Differentiate between pathogens and pests. How does an insect-pest attack the plants?

Difference between


Insect-pests attack the plants in three ways:


i. They cut the root stem and leaves.


ii. They suck the cell sap from various parts of the plant.


iii. They bore into stem and fruits.


More from this chapter

All 67 →
18

A farmer wants to improve the cattle for getting higher yield and increased resistance to diseases. Name the method he should adopt to get animals of desired qualities. Illustrate it for the cows.

 19

What is bee-keeping? Which variety of bee is commonly used for commercial honey production?

 21

Explain composite fish culture system with examples. State the major problem associated with this system. Can fish culture be done in any type of combination? If yes, explain.

 22

(i) What are the common names of Apis dorsata, Apis florae and Apis cerena indica?

(ii) Name one Italian bee variety. Also, justify the use of the Italian bee for honey production giving two reasons.


(iii) State one factor, which affects the quality of honey produced.