Generally farmers use synthetic pyrethroids like pesticides, insecticides to control pests on crops.

Question

Read the paragraph carefully and answer the questions given below.

Generally farmers use synthetic pyrethroids like pesticides, insecticides to control pests on crops. Farmers are also using so many natural pest controlling techniques. 

1. Which concept in agriculture explains the above information? 

2. Name some synthetic pesticides and insecticides. 

3. Distinguish between synthetic insecticides and natural insecticides. 

4. Write about any two natural insect control methods.

Answer 1

1. Crop protective methods. 

2. D.A.P. super phosphate, D.D.T, Heptachlore. 

3. Artificial pesticides are nothing but poisonous chemicals. They harm and kill the pests but also the useful friendly insects which are useful in pollination. Natural pesticides are the insects which feed on pests that destroy crops. 

Ex : 

Dragon fly, spiders, mirids, lady bird beetle. 

4. 

a) By introducing “Bacillus thuringiensis” we can protect our crops, 

b) By adapting mixed crop cultivation we can reduce pests naturally.