
Name some agricultural pests.
Important Questions on Production of Food from Plants




Crop plants may be attacked by pests which affect the crop production. Fungi are such type of pests which cause diseases like

What are used to protect plants from various pests?






Statement 1: Pheromones are used as biological method to control pest.
Statement 2: Statement 2: Pheromones lure adult male insects into special traps and prevent them from breeding.



Write the quadrants in which the following points lie:

Complete the following table of harmful effect of synthetic substances on living organisms.
Synthetic substance | Living being affected directly | Harmful effect |
DDT, methyl parathion pentachlorophenol | ||
Aldrin, Heptachlor |



Match the following.
Column I | Column II |
1. Bio-pesticide | a. Neem leaves |
2. Bio-predators | b. Bacillus thuringiensis |
3. Bio-fertilizer | c. Control whiteflies |
4. Bio-indicators | d. Improve soil fertility |
5. Bio-repellants | e. Quality of environment |

Given below is a list of few chemicals that are used for protection of crops
(i) Dalapon
(ii) Butachlor
(iii) Malathion
(iv) Simazine
(v) Disyston
(vi) Gammexane
How many of these are used as insecticides?
