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 zoology sustainable agriculture microbes and farming biopesticide environmental protection

Identify the set which has all organisms used in biological control of pests.

  1. Trichoderma, Nucleopolyhedro virus, Bacillus thuringiensis, Lady Bird (Lady Bug) beetle

  2. Dragon flies, Bacillus thuringiensis, Lady Bird, Aphids

  3. Lady Birds, Penicillium, Baculovirus, Aspergillus

  4. Trichoderma, Aspergillus, Bacillus thuringiensis, Nucleopolyhedro virus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Trichoderma,Nucleopolyhedro virus,Bacillus thuringiensis,Lady Bird beetle are all used as biopesticides.

Correct answer-A

Multiple choice zoology sustainable agriculture microbes and farming biopesticide environmental protection

An earliest natural bioinsecticide of chinese origin is ________________.

  1. Rotenone from derris roots

  2. Azadirachtin from margosa leaves

  3. Pyrethrin from chrysanthemum

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

Rotenone, derived from Derris roots, has been used as a fish poison and insecticide in China for centuries, predating modern synthetic pesticides.

Multiple choice zoology sustainable agriculture microbes and farming biopesticide environmental protection

Bt toxin kills insect by

  1. Inhibiting protein synthesis

  2. Generating excessive heat

  3. Creating pores in the midgut epithelial cells, leading to cell swelling and lysis

  4. Obstructing a biosynthetic pathway
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Soil bacterium Bacillus thruingiensis (Bt) produces proteins that kill certain insects like lepidopterans (tobacco budworm, armyworm), coleopterans (beetles) and dipterans (flies, mosquitoes). Bacillus thuringinesis forms some intracellular protein crystals. These crystals contain a toxic insecticidal protein. The Bt toxin protein exists as an inactive toxin and is converted into an active form due to the alkaline pH of the alimentary canal that solubilities the crystals. The activated toxin binds to the surface of midgut epithelial cells and creates pores which cause cell swelling and lysis and finally cause the death of the insect.

So, the correct answer is 'Creating pores in the midgut epithelial cells, leading to cell swelling and lysis.

Multiple choice zoology sustainable agriculture microbes and farming biopesticide environmental protection

Which of the following is not used as a biopesticide?

  1. <p>Trichoderma harzianum</p>

  2. <p>Nucleopolyhedrovirus</p>

  3. <p>Xanthomonas campestris</p>

  4. <p> Bacillus thuringiensis</p>
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Xanthomonas campestris is not used as a biopesticide. Bacillus thuringiensis is used as a microbial biocontrol agent. Trichoderma harzianum is a free-living fungi, common in soil and root ecosystems. It is an effective biocontrol agent of several plant pathogens. Viruses of the family Baculoviruses are pathogens that attack insects and other arthropods. The majority of baculoviruses used as biological control agents belong to genus Nucleopolyhedrovirus. So, the correct answer is 'Xanthomonas campestris'.

Multiple choice zoology sustainable agriculture microbes and farming biopesticide environmental protection

Biopesticides are:

  1. The chemicals which are used to destroy the pests

  2. The living organisms or their products which are used for the pest control

  3. The organisms which destroy the crops

  4. None of these.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Biopesticides are those biological agents or their products that are used for the control of weeds and insects (pathogens). A most important example is the soil bacterium, Bacillus thuringiensis.

Multiple choice zoology sustainable agriculture microbes and farming biopesticide environmental protection

Given below is the list of few chemicals that are used for protection of crops
i) dalapon 

ii) butachlor 
iii) malathion 
iv) simazine 
v) disyston 
vi) gammexane
How many of these are used as insecticides?

  1. 3

  2. 4

  3. 2

  4. 5
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
 Name of the compound  uses
 Dalapon It is used as a herbicide and acts on the perennial grasses. It controls the specific weed species and leaving the desired crops relatively unharmed.
 Butachlor It is used as a herbicide. It is mainly used in the form of granules in rice.
 Malathion It is used as an insecticide. It is basically used in mosquitoes eradication. 
 Simazine It is used as a herbicide. It is used to control broad-leaved weeds and annual grasses.
 Disulfoton It is used as an insecticide. It is effective against the sucking insects e.g. beet flies, 
 Gammexane It is used both as an agricultural insecticide and pharmaceutical purpose.

So, the correct answer is ' 3'.

Multiple choice zoology sustainable agriculture microbes and farming biopesticide environmental protection

A biological control which is effective biocontrol agent for several plant pathogens : 

  1. Nucleopolyhedrovirus

  2. Tirchoderma

  3. Agrobacterium

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

Trichoderma are fungi and present in the soil as avirulent symbionts.

Agrobacterium has a unique ability to transfer its DNA to the plants and hence it is manipulated by genetic engineering to make the crop pathogen resistance.
But the biocontrol agent for several plant pathogens is Nucleopolyhedrovirus. It is a virus that infects the pests like butterfly, moth, etc.
So the correct answer is ' Nucleopolyhedrovirus'. 

Multiple choice zoology sustainable agriculture microbes and farming biopesticide environmental protection

Third generation pesticides are

  1. Pheromones

  2. Juvenile hormone analogues

  3. Insect repellents

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

The third generation pesticides are basically the modified forms of the insect hormones that show a great specificity to the pest or insect targetted. The juvenile hormone analogues such as methoprene, hydroprene and fenoxycarb do not kill the insect directly but prevent the development of their larvae. Gradually, they decrease the population of the insect as the adult insects will never be formed.

Hence, the correct answer is 'Juvenile hormone analogues'

Multiple choice zoology sustainable agriculture microbes and farming biopesticide environmental protection

Microbe used for biocontrol of pest butterfly caterpillars is 

  1. Saccharomyces cerevisiae

  2. Bacillus thuringiensis

  3. Streptococcus sp.

  4. Trichoderma sp.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Bacillus thuringiensis , a soil-dwelling bacterium, is the most widely applied species of bacteria used for biological control,  used against Lepidopteran, Coleopteran and Dipteran.
So, the correct answer is 'Bacillus thuringiensis'
Multiple choice zoology sustainable agriculture microbes and farming biopesticide environmental protection

Which of the following statements regarding baculoviruses as biocontrol agents is/are correct ?

  1. The majority of baculovirus used as biocontrol agents are included in the genus - Nucleopolyhedrovirus

  2. Infection with baculoviruses occurs when susceptible hosts (e.g., some specific insects) eat virus particle present on foliage and dies.

  3. These are important in organic farming because of their specific action on harmful insects without causing any damage to beneficial insects as well as to the environment.

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

Baculoviruses are pathogens that attack insects and other arthropods. The majority of them used as a biological control agents are in the genus Nucleopolyhedrovirus.These viruses are excellent candidates for species-specific, narrow spectrum insecticidal applications. Infection with baculoviruses occurs when susceptible hosts eat virus particle present on foliage and dies. These are important in organic farming because of their specific action on harmful insects without causing any damage to beneficial insects as well as to the environment.

So, the correct option is 'Option D' .

Multiple choice

What is the process of applying chemicals to fruit trees to control pests and diseases called?

  1. Spraying

  2. Dusting

  3. Fertilizing

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

Spraying is the process of applying chemicals to fruit trees to control pests and diseases.

Multiple choice

Which federal law regulates the use of pesticides and other agricultural chemicals?

  1. Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA)

  2. Clean Air Act

  3. Clean Water Act

  4. Resource Conservation and Recovery Act (RCRA)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) is a federal law that regulates the use of pesticides and other agricultural chemicals to protect human health and the environment.

Multiple choice

What is the primary active compound in garlic that contributes to its pest-repelling properties?

  1. Allicin

  2. Capsaicin

  3. Piperine

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

Allicin is a sulfur-containing compound that is responsible for garlic's pungent odor and its pest-repelling properties. It is released when garlic is crushed or chopped.

Multiple choice

What is the purpose of a sprayer in agricultural machinery?

  1. Applying pesticides

  2. Harvesting crops

  3. Fertilizing crops

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

A sprayer is used to apply pesticides, herbicides, and other chemicals to crops, protecting them from pests and diseases.