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 evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

Weeds, insects and diseases can be controlled by _____

  1. Use of pesticides

  2. Sprayed on crop plants

  3. Herbicides, insecticides and fungicides

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Integrated pest management involves using various methods, including chemical agents like herbicides, insecticides, and fungicides, to control weeds, insects, and diseases.

Multiple choice evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

Weeds can be removed by using

  1. Pesticides

  2. Weedicides

  3. Antibiotics

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

Weeds are the undesirable plants that are not cultivated. They are the plants at the wrong place. They compete with the crop for nutrients and space. Hence, they are harmful to the crop. These weeds can be controlled by using weedicides.

Multiple choice evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

Which of the following is important to prevent the growth of weeds?

  1. Insecticides

  2. Pesticides

  3. Biofertilizers

  4. Weedicides
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Insecticides and pesticides are used to kill the insects and the pest that harm the crops . While biofetilizers are the manure (contains living microorganisms) . On the other hand , weedicides are used to kill the weeds .

So the correct option is 'Weedicides' .

Multiple choice evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

The prodigious spread of prickly pear (Opuntia) in South India was controlled by

  1. cochineal insect

  2. colchicine

  3. DDT

  4. 2, 4-D
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When the invasive species prickly pear was introduced it possessed a threat to the native species. The growth Opuntia is then controlled by the introduction of the species of the cochineal insect.

This was the biological methods of the plant management.
So, the correct option is 'cochineal insect'

Multiple choice evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

Which of the following groups of herbicides is derived from urea, and is used for controlling weeds in tea, tobacco and cotton?

  1. Carbamates

  2. Triazines

  3. Pyrethroids

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

A carbamate is an organic compound which is derived from carbamic acid (NH$ _{2}$COOH). 

A pyrethroid is an organic compound similar to the natural pyrethrins produced by the flowers of pyrethrums (Chrysanthemum cinerariaefolium and C. coccineum). Pyrethroids now constitute the majority of commercial household insecticides. 
An organophosphate or phosphate ester is the general name for esters of phosphoric acid. 
Triazines show antimalarial, antibacterial, and antimicrobial activities. They are derived from urea and used in tea, cotton and tobacco plantation and some orchid plantation. Thus, option B is correct.

Multiple choice evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

Weeds affect the crop plants by

  1. Killing the crop plants before they grow

  2. Secreting poisons which cause diseases in crop plants

  3. Competing for various resources of crop plants causing low availability of nutrients

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Weeds are unwanted plants in the cultivated field. They compete with the crop plants for food, space and light. They take up the nutrients and reduce the growth of the  crop.

Multiple choice evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

The most important weed against which eradication measures would be taken on war footings is

  1. Eichhornia

  2. Dactylis

  3. Parthenium

  4. Ageratum
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Parthenium is most common weed which grows anywhere on the land like roadsides, war footings etc.  It releases chemicals to supress the growth of plants and allergents toxic to other livestock. Thus it is important to supress  this weed first. Thus the correct answer is 'Parthenium'. 

Multiple choice evs whose forests? improved methods of agriculture cropping patterns food for all conservation of forest and wildlife wildlife deforestation and conservation

The common weedicide used in cultivating fields is 

  1. 2, 4 - D

  2. 2,4,5 - T

  3. IAA

  4. ABA
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Weedicides can be defined as the pesticides used to kill the weeds. Bio-weedicides are called herbicides. Herbicide also commonly known as weedkillers, are pesticides used to kill unwanted plants. 2,4-D (2,4-dichlorophenoxy) is a systemic phenoxy herbicide developed in the 1940s and still in use today. The low cost of 2,4-D has led to continued usage, and it remains one of the most commonly used herbicides in the world. 
Multiple choice botany option b: biotechnology and bioinformatics gram staining microbiology: organisms in industry cell wall and cell membrane

____________ is a microbial bio-control agent.

  1. Pseudomonas

  2. Penicillium

  3. Bacillus thuringiensis

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

Pseudomonas are aerobic, gram-negative bacteria, ubiquitous in agricultural soils, and are well adapted to growing in the rhizosphere. Pseudomonads possess many traits that make them well suited as biocontrol and growth-promoting agents. 

Multiple choice zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

The greatest threat to genetic diversity in agricultural crops is

  1. Extensive use of insecticides and pesticides

  2. Extensive mixed cropping

  3. Introduction of high yielding varieties

  4. Extensive use of fertilisers
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Genetic diversity is the diversity in the number and types of genes present in different species and variations in the genes of the same species. The greatest threat to genetic diversity in agricultural crops is introduction of high yielding varieties. High yielding varieties contains the required traits and therefore are always bred purely. This reduces the genetic diversity within a particular species.

Thus, the correct answer is 'Introduction of high yielding varieties.'

Multiple choice zoology soil pollution industrial chemicals and their harmful effects toxic wastes and their effects soil pollution-causes

Which of these is made by using chemicals?

  1. Organic manure

  2. Biofertilizers

  3. Natural insecticides

  4. Pesticides
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Organic manure is the substance made up of animal and human excreta and plants wastes. Biofertilizer is the fertilizer made up of living or dried microorganism. Natural insecticides are the substance used to kill the harmful insect. It is made up of plant products and microorganisms. They have no negative impact on the environment. While pesticide is the synthetic substance used to kill the harmful pest. It is made of a chemical in factories. It can involve in the food chain and cause harmful effects to the environment.