Pests Of Crops


Pests of crops are a significant challenge in agricultural production, causing immense damage to crops and posing a threat to food security. Understanding the concept of pests is vital in effective crop protection strategies. Pests are defined as organisms that cause harm to crops, leading to reduced yield and quality.

These can be classified into insect-pests and non-insect pests based on their characteristics and feeding habits. Insect-pests are further categorized based on their mouthparts, including biting and chewing, piercing and sucking, and boring types. Each category plays a specific role in damaging crops. For example, stem borers, army worms, and ear worms are common insect-pests affecting cereals like maize and wheat. They have distinct life cycles, economic impacts, and modes of damage, making them crucial targets for preventive and control measures. Moreover, legumes, beverages, tubers, fibre crops, fruits, and vegetables also face infestations from various insect-pests such as pod borers, aphids, grasshoppers, and leaf beetles.

Understanding the nature of damage caused by these pests is essential in implementing appropriate control strategies to mitigate their impact on crop production. Additionally, stored produce like grains and beans are vulnerable to pests like weevils and beetles, emphasizing the need for post-harvest pest management techniques. Non-insect pests, including birds and rodents, also contribute to crop damage, especially in the field and during storage. Their presence poses a significant challenge to farmers, requiring innovative approaches to deter their harmful effects on crops. Considering the side effects of pest control methods is crucial in sustainable agriculture practices.

Chemical control methods may lead to pollution and poisoning risks, affecting the environment and human health. Biological and cultural control measures can disrupt the ecosystem balance if not implemented thoughtfully. Understanding the economic importance of pests in agriculture is essential for farmers to appreciate the significance of pest management practices. Pests can lead to substantial yield losses, affecting food availability and market prices.

By identifying, classifying, and implementing preventive and control measures against pests, farmers can safeguard their crops and optimize agricultural productivity. Ultimately, a comprehensive understanding of pests and diseases is fundamental in ensuring sustainable crop production and food security. [[[Include a diagram here showing the classification of insect-pests based on mouthparts]]]


  1. Understand the meaning of pests
  2. Implement preventive and control measures against pests
  3. Identify and classify insect-pests based on mouth parts
  4. Analyze the economic importance and nature of damage caused by pests
  5. Evaluate the side effects of different pest control methods
  6. Appreciate the general effects and economic importance of pests
  7. Recognize important insect-pests of major crops

Lesson Note

Not Available

Lesson Evaluation

Congratulations on completing the lesson on Pests Of Crops. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.

You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.

Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.

  1. What is the meaning of pests in the context of crop protection? A. Beneficial organisms B. Harmful organisms that damage crops C. Soil nutrients D. Crop enhancers Answer: Harmful organisms that damage crops
  2. Which of the following is not a classification of pests based on mouth parts? A. Biting and chewing B. Piercing and sucking C. Pecking and scratching D. Boring Answer: Pecking and scratching
  3. Which insect-pest is known for boring into plant stems and roots? A. Stem borer B. Army worm C. Aphids D. Thrips Answer: Stem borer
  4. What is the economic importance of controlling pests in crop production? A. Increase yield and quality of crops B. Decrease crop losses and damage C. Promote natural selection of pests D. Maintain pest population balance Answer: Decrease crop losses and damage
  5. Which of the following is a non-insect pest that can damage crops? A. Grasshoppers B. Aphids C. Birds D. Thrips Answer: Birds
  6. Which side effect is associated with the use of chemical pest control methods? A. Increase in beneficial organisms B. Pollution C. Promotion of biodiversity D. Ecosystem balance Answer: Pollution
  7. What is the general effect of pests on crop production? A. Decrease in yield and quality of crops B. Increase in crop resistance C. Promotion of plant growth D. Reduction of soil fertility Answer: Decrease in yield and quality of crops

Recommended Books

Past Questions

Wondering what past questions for this topic looks like? Here are a number of questions about Pests Of Crops from previous years

Question 1 Report


(a)(i) Name the toxic substance found in specimen G (FRESH CASSAVA TUBER).
(ii) Suggest four ways of removing the toxic substance named in (a)(i).

(b) State two uses each of specimens I (ONION BULBS) and J (PEPPER FRUITS).

(c) List four pests of specimen I.

(d) Name two groups of crops to which specimens I and J belong based on their uses.

Practice a number of Pests Of Crops past questions