Environmental Studies · Biology

Pesticides and Pest Control

1,208 Questions

Pesticides and Pest Control focuses on the management of invasive species through chemical, biological, and cultural methods. It includes topics like integrated pest management, herbicide targets, and the ecological impacts of toxic chemicals. This subject is frequently tested in environmental science and agriculture exams.

Integrated Pest ManagementBiological Control AgentsHerbicide MechanismsChemical Pesticide ToxicityGenetic Pest ResistanceInvasive Species Management

Pesticides and Pest Control Questions

Multiple choice

Match the following:

a. Insecticide 1. It is a biocidal chemical compound or biological organism used to kill or inhibit fungi or fungal spores.
b. Weedicide 2. It is any pesticide used to kill, deter or control insects.
c. Fungicide 3. It is a chemical agent that destroys unwanted plants, but not wanted ones.

  1. a - 2, b - 1, c - 3

  2. a - 2, b - 3, c - 1

  3. a - 3, b - 2, c - 1

  4. a - 1, b - 2, c - 3

  5. a - 1, b - 3, c - 2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option. Insecticide is any pesticide used to kill, deter or control insects. Weedicide is a chemical agent that destroys unwanted plants, but not wanted ones. Fungicide is a biocidal chemical compound or biological organism used to kill or inhibit fungi or fungal spores.

Multiple choice

Which algae is used for the production of the insecticide 'Insecto'?

  1. Diatoms

  2. Rhodophyta

  3. Pyrrhophyta

  4. Phaeophyta

  5. Charophyta
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Insecto is a diatomaceous earth product isolated from diatoms and is used to control the insects, which have their soft body parts exposed but covered by a waxy film to prevent dehydration. When they came in contact with diatoms in Insecto, the silica frustule break the waxy film on the insects causing them to dehydrate and die.

Multiple choice

I am a chemical, I get sprayed in fields to kill natural enemies. I am harmful to the natural enemies but not to crops and humans, but my overuse may destroy the crop and harmful to humans too. Who am I?

  1. Compost

  2. Manure

  3. Bio fertilizers

  4. Pesticides

  5. Organic fertilizers
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pesticides are chemicals, get sprayed in fields to kill natural enemies like insects.  It is harmful to the natural enemies but not to crops and humans. Its over use may destroy the crop and can also be harmful to humans too.  So this is the correct answer.

Multiple choice

Which of the following is commonly used as a pesticide by farmers?

  1. Blue vitriol

  2. DDT

  3. Potassium nitrate

  4. BHC

  5. None of these
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Blue vitriol, DDT, BHC and potassium nitrate, none of these are common used pesticides. Pesticides are substances or mixture of substances intended for preventing, destroying, repelling, or mitigating any pest. Pesticides are a special kind of products for crop protection. Some common pesticides are glyphosates, atrazine, metolachlor, etc.

Multiple choice

DDT comes under which category of pesticides?

  1. Organochlorines

  2. Rodenticides

  3. Insecticides

  4. Herbicides

  5. NA
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

DDT is an organochlorine. Organic compounds that have been chlorinated, have very low biodegradation, get accumulated in environment and cause many problems. DDT comes under these. Hence, it is correct.

Multiple choice

Excessive use of pesticides pollutes the ________.

  1. atmosphere

  2. biosphere

  3. lithosphere

  4. stratosphere

  5. hydrosphere
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Excessive use of pesticides pollutes the lithosphere. Lithosphere is the solid crust from the center of the earth to the outer surface. It gets polluted due to dumping of pesticides and herbicides.

Multiple choice

Weedicides are sprayed in the fields during the vegetative growth of weeds _________.

  1. before sowing seeds

  2. after flowering

  3. just before harvesting

  4. before flowering

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This question is essentially identical to 228906. Weedicides are sprayed during the vegetative growth of weeds before flowering occurs. This prevents seed production and breaks the weed life cycle. The timing is critical - applying weedicides after flowering allows seeds to mature and disperse, reducing effectiveness.

Multiple choice

Which is an insect repellant?

  1. Citronella oil

  2. Pyrethrum

  3. Wormwood

  4. Reserpine

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Citronella oil is an insect repellant.