Agricultural Science

Prevention and Control of Crop Pests

len Alfred Ajibola - Tue, 10th March, 2020 @ 12:31: PM

Topics in Agricultural Science

Prevention and Control of Crop Pests Economic Importance of Crop Pests Classification of Insect Pests and their Economic Importance Agricultural Machines and their Uses Soil Erosion: Causes of Soil Erosion Ways to prevent Soil Erosion Asexual Propagation in Plants, Types and Examples Differences between Gymnosperms and Angiosperms Scheme of Work, Agricultural Science, SS1, First Term Scheme of Work, Agricultural Science, SS1, Second Term Scheme of Work, Agricultural Science, SS1, Third Term Len Academy Agric Science exam questions, JSS1, First Term Len Academy Agric Science exam questions, JSS1, First Term, part 2 Agriculture Terms - Definitions and Meanings of Agricutural Terms (P - Q) Agricultural Terms: Definition and Meanings of Agricultural Terms (P and Q), part 2 Len Academy questions for Agric Science JSS1, 2nd Term Len Academy questions for Agric Science JSS1, 2nd Term, Part 2 Roles of Government in Agriculture Agricultural pest and Crops attacked Agriculture Terms - Definitions and Meanings of Agricutural Terms (I - O)


Academic Questions in Agricultural Science

Please check out our Test Your Knowledge page to see all Questions and Answers

Which of the following is an example of oil crop?

  • A. Melon

  • B. Rubber

  • C. Flax

  • D. Moringa

  • E. Ginger

  • F. Coffee

Concerning crops and plants, which of the following statement is incorrect?

  • A. All plants are not crops

  • B. All crops are plants

  • C. Cactus can be a crop

  • D. Corpse flower is not a plant

  • E. Venus flytrap is not a crop

  • F. All the options are correct

Which of the following is not a problem associated with agriculture?

  • A. Superfluous research facilities

  • B. Poor road network

  • C. Illiteracy

  • D. Lack of storage facilities

  • E. Limited mechanized farming

  • F. Bad government policies

Mallet - Len Academy

The above image is a _____.

  • A. Hammer

  • B. Crowbar

  • C. Shear

  • D. Secateur

  • E. Bolo

  • F. Mallet

Cutlass - Len Academy

The agricultural tool shown in the image (above) is used for the followings except _____.

  • A. For cutting tree branches, weeds, and other plant materials in farmland

  • B. To remove dirts from the top soil

  • C. For harvesting crops like sugarcane

  • D. To clear bushes

  • E. For planting crops like melon

  • F. To dig superficial holes for the planting of seeds

Which of the following statement is false concerning soil erosion?

  • A. The top soil is moved from one point to another

  • B. Man is an agent that bring about soil erosion

  • C. Wind and water are natural agents of soil erosion

  • D. Sheet erosion is said to occur when the surface of a land is eroded at an unequal levels

  • E. Deforestation will increase the likehood of wind erosion

  • F. Rill erosion results in the formation of miniature dongas on land

Gully erosion - Len Academy

The above diagram shows a _____ erosion.

  • A. Wind

  • B. Sheet

  • C. Rill

  • D. Gully

  • E. Landslide

  • F. Crooked

An instance of farming whereby a farmer uses animal and green manure as fertilizers in place of chemicals like NPK is termed _____.

  • A. Reformative farming

  • B. Alternative farming

  • C. Crude farming

  • D. Retrogressive farming

  • E. Non-Chemical farming

  • F. Agro-farming

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Prevention and Control of Pest:

Prevention of crop pest refers to the various steps taken to keep crops intact (when they are yet to be attacked by pests). They are therefore done to prevent pests from acting on crops and other agricultural produce.

The control of crop pest refers to the various actions taken by the farmer to minimize or stop the actions of pests (already acting) on agricultural produce.

Please read on the Agricultural Pests and the Crops they attack here.

Crop pests can be prevented and controlled through a variety of methods. These are:


1. Physical Control

This process involves the physical or mechanical removal of pest from an agricultural land via various techniques such as:

  • Hand picking.
  • Setting of traps to catch rats and rodents.
  • Fencing the farmland.
  • Use of guns to kill monkeys.
  • Contaminating food with poisons to kill certain pest; for instance, rodents.

Please read on Agricultural Tools and their Uses here.


2. Biological Control

This method of pest control require the use of animals (or other organisms) that act as a natural enemy to pest. By nature, these animals enjoy eliminating pest. The animals used in biological control of pests typically act as a predator, parasitoid or pathogen to the appropriate pest.

You can read on Amazing Facts in Biology here.

Below are some examples of the biological control of pests:

  • Placing hen in a farmland to eat insects. The hen acts as a predator to various insects. (Crops planted on the farmland should not be a meal to the hen, for example, maize).
  • Putting parasitic wasps on a farmland to infect aphids and their eggs. They also infect and kill caterpillar worms, clearwing moth larvae, elm leaf beetle, giant whitefly, mealybugs and lace bugs.
  • The proliferation of the European rabbit (a pest in Australia) can be controlled by introduction of myxoma virus. The virus causes a disease termed myxomatosis to the rabbits, ultimately leading to their deaths.
    Please read on various Agricultural Terms and Meanings here.

Note: Any new method to be implemented in the biological control of pest must be carefully analysed and considered before they are released into the environment. This is done to prevent an attack on useful and other harmless organisms within the environment.

Please read on the Economic Importance of Crop Pests here.


3. Chemical Control

Chemical control of pest involves the use of toxic substances (chemicals) to eliminate pest within an environment. Such toxic substances or chemicals are generally referred to as pesticides. The pesticides can take different forms; (That is; they can exist in liquid, powdered, granular or gaseous forms).

Please read on Agricultural Pest and Crops Attacked here.

In summary, chemical control of pest involves the use of:

  • Pesticides: A chemical generally used to kill pests.
  • Insecticides: A chemical that kills insect.
  • Fungicides: A chemical that kills fungi.
  • Avicides: A chemical used for killing birds.
  • Rodenticides: A chemical used for killing rodents.
  • Nematicides: A chemical that kills nematode.

4. Cultural Control

Cultural control of pest is a method that requires the application of various farm practices to control pest. The application of these farm practices functions to interrupt the life cycle of the pest; thus significantly decreasing their proliferation on agricultural land.

You can read on Agricultural Land and its Uses here.

The various farm practices that interrupts the life cycle of pests include:

  • Crop rotation
  • Bush fallowing
  • Regular weeding
  • Use of disease resistant seeds
  • Strategic planting dates
  • Timely harvesting

Please read on the Differences between Plants and Crops here.

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Alfred Ajibola is a Medical Biochemist, a passionate Academician with over 7 years of experience, a Versatile Writer, a Web Developer, a Cisco Certified Network Associate and a Cisco CyberOps Associate.


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Amazing facts in Agricultural Science

🥜 Peanuts 🥜 are legumes and not nuts

Although plants neither see nor hear, they can recognize their siblings and even give them preferential treatments 🤔

Squirrels do plant more 🌲 trees 🌲 (through their actions) than an average human in their lifetime. They often hide their acorns and nuts underground and forget about them 😁

🐄 Cows 🐄 have got the ability to walk up stairs, but not down stairs

A group of cows 🐄 🐄 🐄  is called a team, drove or herd.

People just prefer to call them herd


NOTABLE POINTS IN Agricultural Science

Below are some common types of erosion:

  • Water Erosion: It is caused by rainfall and flooding on the topsoil. As a result of water erosion, some layers of the topsoil are lost.

  • Sheet Erosion: When an entire surface of land becomes eroded at a uniform (equal) level, such is referred to as sheet erosion.

    Sheet Erosion - Len Academy

  • Wind Erosion: It results from the actions of wind on a bare land. Wind erosion is often seen in deserts. Overgrazing and lack of vegetation cover will also enhance wind erosion on topsoil.

​​​Please read more on types of soil erosion here.

Soil erosion is defined as a process through which the topsoil is removed or moved from one point to another by agents like wind, water, man and animals.

Soil erosion occurs naturally (wind and water) and may also be facilitated by living organisms.

Soil erosion is more likely to occur on a sloppy land and land with no vegetation cover. When this occurs, the nutrient rich layer of the topsoil is washed away; and this ultimately results in fewer plants growing on such eroded soil.

Please read more on soil erosion here

There are about 630 different kinds of carnivorous plants.

Carnivorous plants are plants that derive some or most of their nutrients by consuming small animals, especially insects.

Carnivorous plants are also referred to as insectivorous plants.

Some example of carnivorous plants include sundew and Venus flytrap.

Please read more on Carnivorous Plants here