MCQ ON AGRICULTURAL PESTICIDES

 

 

 

 

 

 

1. Which of the following pesticide is of lipophilic nature

(a)   2,  4 – D                                  (b)   DDT

(c)  BHC                                         (d)   All the above

2. Most of the insecticides affect on [MP PMT 2000]

(a)   CNS                                         (b)   Liver

(c)   Body                                       (d)   Stomach

3. Resistance in mosquitoes has been developed against

(a)   DDT                                        (b)   BHC

(c)   (a) and (b) both                  (d)   None

4. Difference between Burgundy’s mixture and Bordeaux mixture is the presence of …….. in the former

(a)                                     (b)

(c)   Both (a) and (b)                  (d)   Water

5. Malathion, parathion and fenitrothion belong to the group of [MP PMT 1984, 94; AIIMS 1998]

(a)   Carbamates                          (b)   Organophosphates

(c)   Prytheroids                          (d)   Triazines

6. DDT concentration in the human body is

[RPMT 1998; MP PMT 2000]

(a)   0.3-0.7 ppm                          (b)   1.3-3.1 ppm

(c)   13-31 ppm                            (d)   30-70 ppm

7. Gossypleure H.F. is a

(a)   Enzyme                                  (b)   Synthetic hormone

(c)   Both                                        (d)   None

8. Lady bug is used for the control of

(a)   Mosquito                               (b)   Aphids

(c)   Sparrow                                 (d)   Parakeet

9. Biological control component is central to advanced agricultural production. Which of the following is used as a third generation pesticide          [CBSE PMT 1998]

(a)   Pathogens                             (b)   Pheromones

(c)   Insect repellants                 (d)   Insect hormone analogues

10. BHC was first synthesized in 1825 by

(a)   Schrader                                (b)   Zeidler

(c)   Paul Muller                           (d)   Michael Faraday

11. The pesticides highly toxic and quite expensive are

(a)   DDT                                        (b)   Triazines

(c)   Pyrethroids                          (d)   All of these

12. Food mixed with toxin to kill insects is called

(a)   Pesticide                                (b)   Bait

(c)   IPM                                         (d)   All the above

13. The mode of action of insecticides is through the attack on

(a)   Respiratory system            (b)   Nervous system

(c)   Muscular system                 (d)   Both (a) and (b)

14. IPM involves use of

(a)   Biological control

(b)   Mechanical control

(c)   Modification of cultural practices and carefully planned use of pesticides

(d)   All of the above

 

 

 

 

 

1	d	2	a	3	c	4	b	5	b
6	c	7	b	8	b	9	d	10	d
11	c	12	b	13	d	14	d

 

1. (d) All belongs to the group `organochlorines’; members of which are lipophilic compounds showing much affinity for the fatty tissue of animals and can accumulate inside the bodies of herbivorous animals. For this reason, they are now banned in western countries.
2. (b) Bordeaux mixture consists of copper sulphate lime and water and Burgundy’s mixture is copper sulphate, sodium carbonate, and water.
3. (b) Major organophosphates used in India are malathion, parathion and fenitrothion.
4. (c) In India as a result of prolonged use of DDT 13-31 ppm of DDT can be detected in the body fat of the people.
5. (d) Inorganic substances, oils, plants extracts used as insecticides are called first generation pesticides synthetic organic. Compound as second generation pesticides insect hormone as third generation pesticides.
6. (d)BHC was first synthesized by Michael Faraday in 1825
7. (c) Pyrethroids are highly toxic and quite expensive not used on a large scale in India at present.

 

 

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