Environmental Studies · Biology

Pesticides and Pest Control

1,236 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 general knowledge resources of india and world animal husbandry and fishery green and white revolution agriculture in indian economy

When one animal is used to suppress another, it is called this. e.g., if snakes are encouraged in an area, the rodent population will be controlled. What is the term used?

  1. Technical control of pests

  2. Pest control

  3. Botanical control of pests

  4. Biological control of pests
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Biological control involves using natural predators, parasites, or pathogens to manage pest populations, such as using snakes to control rodents.

Multiple choice evs - i infectious diseases and how to prevent them energy and health infectious diseases - transmission and prevention credit communicable diseases pathogen and their mode of transmission

Vector insects are which

  1. Spread disease

  2. Destroy crop

  3. Spoil soil

  4. Act as scavengers.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • A disease vector is an agent who carries and transmits an infectious pathogen into another living organism.
  • Vector-borne diseases are human illnesses caused by parasites, viruses, and bacteria that are spread by insects like mosquitoes, sandflies, triatomine bugs, black flies, ticks, tsetse flies, mites, snails and lice. For example, Female Anopheles mosquito is a vector for malaria.
  • Hence Vector insects are which spread disease.
  • So, the correct answer is 'Spread disease'.
Multiple choice evs - i food for all improved methods of agriculture receding water table water conservation and irrigation

Which of the following bacterium is used as a biopesticide?

  1. Bacillus cereus

  2. Bacillus thuringiensis

  3. Bacillus polymyxa

  4. Bacillus anthracis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Bacillus thuringiensis, or Bt, is a soil bacterium. Thurioside is a toxin produced by the bacterium, Bacillus thuringenesis. It is used as a bioinsecticide. , when sprayed on plants, is toxic to certain pest insects. For years, farmers and home gardeners have used Bt as a microbial spray pesticide to control caterpillars, certain types of beetles, as well as mosquitoes and blackflies. 
Therefore, the correct answer is option B.
Multiple choice evs - i food for all improved methods of agriculture receding water table water conservation and irrigation

The use of a natural predation against another pathogenic organism is called as

  1. Genetic control

  2. Biological control

  3. Artificial control

  4. Pesticidal control
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The safest method of pest control is biological control. It involves the use of natural predators, parasites to prevent the growth of harmful pests like insects, mites by natural mechanism and active human control.
So, the correct answer is 'Biological control'
Multiple choice plant diseases keeping diseases away biology

Which one of the following is a copper fungicide?

  1. Boredeaux mixture

  2. Carboxin

  3. Chloropicrin

  4. Mercuric chloride
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bordeaux mixture is a classic fungicide made from copper sulfate and lime. Carboxin is a systemic fungicide, while Chloropicrin is a fumigant and Mercuric chloride is a heavy metal disinfectant.

Multiple choice zoology our environment - our concern biomagnification the effects of human activities on ecosystems bioaccumulation and biomagnification

The range of biomagnification of DDT in an aquatic food chain, if starting from 0.003 ppb level in water may go at fish-eating bird level upto:

  1. 0.3 ppm

  2. 3.0 ppm

  3. 30.0 ppm

  4. 0.003 ppm
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pesticides and nondegradable. They have much affinity for fats. Hence, they tend to move into living organisms. They get concentrated as they move up the food chains. For example at each trophic level, the accumulation of insecticide is increased by 10 times. For example, if the goat gets one part per million of DDT from the grass is it will have 10 parts per million in its tissues. The man eating the good will have 100 PPM. The man-eating tiger will have thousand PPM. If the food chain is still greater the accumulation will still be higher. Is increasing accumulation of insecticide and the higher organism is called biomagnification which is biological amplification.

So, the correct option is '3ppm'

Multiple choice zoology our environment - our concern biomagnification the effects of human activities on ecosystems bioaccumulation and biomagnification

DDT residues are rapidly passed through food chain causing biomagnification because DDT is

  1. Water soluble

  2. Lipid soluble

  3. Moderately toxic

  4. Non-toxic to aquatic animals
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
DDT is a chlorine containing pesticide used in agriculture. DDT is rapidly passed through food chain causing biomagnification because it is stable, accumulates in the soil and concentrates in the fatty tissue or internal organs of body (as DDT is fat soluble substance). So, DDT takes may years to break down and it enters into body of other organisms with predation. So the amount of DDT biomagnifies.
So, the correct answer is 'Lipid soluble'.
Multiple choice zoology our environment - our concern biomagnification the effects of human activities on ecosystems bioaccumulation and biomagnification

Which of the following causes bio-magnification?

  1. $ { SO } _{ 2 } $

  2. Mercury

  3. DDT

  4. Both (b) and (c)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Biomagnification refers to increase in concentration of toxicant at successive trophic levels. This happens because a toxic substance accumulated by an organism cannot be metabolised or excreted, and is thus passed on to the next higher trophic level. This phenomenon is well-known for mercury and DDT.

Multiple choice zoology our environment - our concern biomagnification the effects of human activities on ecosystems bioaccumulation and biomagnification

Which of the following statements is not correct regarding biomagnification?


(i) Mercury accumulated by an organism cannot be metabolised.
(ii) In the process of biomagnification, concentration of DDT is increased at successive trophic levels.
(iii) Accumulation of cadmium can cause thinning of eggshells in birds.
(iv) DDT accumulation is a major cause of a reduced population of fish-eating birds.
(v) Biomagnification occurs only in the aquatic food chain

  1. (i), (iii) and (v)

  2. (iii) and (iv)

  3. (iii) and (v)

  4. (i), (ii) and (iv)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The higher amounts of pesticide like DDT, disturb calcium metabolism of birds resulting in thinning of egg shells and their premature breaking. This is a major cause of reduction of population of fish eating birds. Biomagnification is found in all types of food chains.