Agricultural Science

Classification of Insect Pests and their Economic Importance

len Alfred Ajibola - Thu, 05th March, 2020 @ 11:45

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

A female chicken less than one year old is referred to as a _____.

  • A. Poult
  • B. Pullet
  • C. Poulta
  • D. Chicken
  • E. Hen
  • F. Fowl

Small plants that grow via vegetative propagation from the parent plants are called _____.

  • A. Child Plants
  • B. Crop Plants
  • C. Plant Crops
  • D. Croplets
  • E. Plantlets
  • F. Progeny

The female part of the flower comprising the stigma, style and ovary is the _____.

  • A. Ovule
  • B. Androecium
  • C. Stamen
  • D. Petal
  • E. Sepal
  • F. Pistil

Which of the following food is best preserved through pasteurization?

  • A. Rice
  • B. Beans
  • C. Coconut
  • D. Meat
  • E. Milk
  • F. Tomatoes

The total number of parasites that are present in a host organism is termed  _____.

  • A. Parasite
  • B. Parasite Count
  • C. Parasite Number
  • D. Parasite Load
  • E. Parasite Value
  • F. Parasite Figure

All plants are crops.


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Classification of Insect Pests:

An insect pest can simply be defined as any insect capable of causing damage to crop plant.

Please read on the Differences between Plants and Crops here.

It is important to state that we have other organisms that aren't insects (insect pests) but are also capable of causing damage to crop plants. Such organisms include:

Our classification of insect pest will be based on their mode of feeding. These group of insect pests will include:

1. Biting and Chewing Insects

A major characteristic of the biting and chewing insect pest is the possession of mouth-parts such as a strong mandible and maxillae.

You can read on the Skeletal Material (Chitin) which is typically found in Insects here.

The image below shows the mouth parts of a biting and chewing insect:
Mouth parts of biting and chewing insect - Len Academy

Please read on Pest of Agricultural Importance and Crops Attacked here.

Note: The mandibles and maxilla of insect pests are used for biting and chewing plant parts.

Examples of biting and chewing insects include grasshoppers, termites, army worms, locust, beetles, leaf worms and so on.


2. Piercing and Sucking Insects

Piercing and sucking insects possess a strong mouth part called proboscis.

The proboscis is a tiny and elongated mouth-part which enables certain insects to pierce through plants in order to suck the liquid substances from their tissues.

You can read on various Agricultural Terms and Meanings here.

The image below shows the proboscis of a piercing and sucking insect:
Mouth parts of piercing and sucking insect (Proboscis) - Len Academy

Examples of piercing and sucking insects include aphids, cotton strainers, butterflies, mealy-bugs and white flies.


3. Boring Insects

Boring insects will bore or make holes into crop plants. They end up destroying the tissues of plants, fruits and seeds through this process.

Please read more on the Problems of Agriculture in Nigeria here.

Examples of boring insects are stem borers, bean beetles and weevils.


Economic Importance of Insect Pest

Below are some of the economic importance or effects of insect pest in crop production:

  1. They reduce the farmer’s profit.
    You can read on Roles of Government in Agriculture here.
  2. They cause reduction in the viability of stored produce.
  3. Some are vectors of diseases. A vector is an organism that carries and transmits a disease causing organism into another organism (called the host).
    Please read more on Vectors of Diseases here.
  4. They destroy crops through their biting, chewing, boring, sucking and defoliation activities.
  5. While attempting to control them, the cost of production is increased.
    You can read on Agricultural Tools and their Uses here.
  6. They render vegetables and fruits unattractive and unmarketable.
  7. They generally reduce the yield of crops.
  8. They may bring about the death of crop plants.
    You can read on the Characteristics of Living Organisms 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

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

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