Level: JHS, Basic 9 | Subject: Integrated Science | Strand: Cycles | Topic: Life Cycle of Crop Pests and Integrated Pest Management
Read the summary notes first: Basic 9 Integrated Science Summary Notes: Crop Pests and Integrated Pest Management
Test Yourself: 20 Objective Questions
Tick one answer for each question, then press Review answer. If your answer is wrong, it will be marked first, then the correct answer will show in green.
Essay Questions
- Describe the life cycle of the maize stem borer and state two ways it reduces the yield of maize. (6 marks)
- Explain how weevils damage stored grain and give three ways of protecting stored grain from them. (5 marks)
- What is integrated pest management (IPM)? Describe any four methods used in it. (6 marks)
- State four ways in which crop pests affect farmers and the nation. (4 marks)
- State four safety rules a farmer should follow when using pesticides. (4 marks)
Essay Questions: Marking Guide for Teachers and Parents
- (6 marks) Complete metamorphosis with four stages (1). Egg: the adult moth lays eggs on the leaves (1). Larva: the caterpillars hatch, bore into the stem and feed inside (1). Pupa: the larva changes into a pupa in the stem or in crop residue, and then the adult moth comes out (1). Any two effects on yield (1 each): dead heart in young plants, broken stems, poor cobs.
- (5 marks) Damage, any two (1 each): the grubs feed inside the grain and hollow it out, holes appear, weight is lost, flour dust forms. Protection, any three (1 each): dry the grain well, clean the store, use airtight (hermetic) bags, use neem or wood ash, sun dry again from time to time.
- (6 marks) IPM is the use of several pest control methods together to keep pests below harmful levels with the least harm to people and the environment (2). Any four methods (1 each) with an example: cultural (crop rotation, early planting), mechanical (hand picking, traps), biological (natural enemies, neem extract), chemical (pesticides used only when needed), legal (quarantine).
- (4 marks, 1 each) Lower crop yield and quality; food shortage and higher prices; money lost buying pesticides and storage materials; loss of income for farmers; less export income for the nation.
- (4 marks, 1 each) Read the label and follow the dose; wear gloves, mask and protective clothing; do not spray near rivers, ponds or food; never reuse empty pesticide containers; keep children and animals away; wait the stated time before harvesting.
Education Always (education.inspiringalways.com). Original practice questions, not official WAEC or BECE questions.