Health Issues in Crop Production · SHS2 Agriculture

Lesson notes

Learning Objectives

Indicator: 2.4.1.LI.3 - Examine the preventive and control measures in controlling diseases in crop production under food safety measures.

By the end of the lesson, learners can:

Distinguish between preventive measures and control measures for crop diseases and explain why prevention is preferred in food safety management.
Describe at least five cultural, physical, biological, chemical and legislative methods used to prevent and control crop diseases.
Analyse the food safety implications of each disease control method, including withholding periods and residue management.
Evaluate the merits and demerits of different disease control strategies in terms of cost, effectiveness, environmental impact and food safety.
Demonstrate correct and safe procedures for applying disease control measures on the farm, observing personal protective equipment (PPE) and chemical safety rules.

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Curriculum details

Strand: Agriculture and Health (Strand 4)
Sub-strand: Health Issues in Crop Production (4.1)
Content standard: 2.4.1.CS.1 - Demonstrate knowledge, understanding and skills of the effects of common pests and diseases of crops and their causes, symptoms and prevention and control measures. 2.4.1.LO.1 Use the knowledge acquired to analyse the economic importance of pests and diseases in crop production and apply appropriate measures in the prevention and control of crop pests and diseases.
Indicator: 2.4.1.LI.3 - Examine the preventive and control measures in controlling diseases in crop production under food safety measures.
Suggested placement: Semester 2, Week 9 (Week 29 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: NaCCA curriculum document, p. 159

Exemplars (from the NaCCA curriculum)

Experiential learning: Learners in mixed-ability groups embark on a field trip to a nearby crop farm to observe the control and preventive measures of plant diseases and pest or watch video/pictures on control and preventive measures of plant diseases and pest.
Collaborative learning: Learners in mixed-ability groups discuss the control and preventive measures for crop diseases and pests applied in crops production and make a presentation in class.
Initiating talk for learning: Learners discuss the merits and demerits of the various methods of prevention and controlling crop diseases and pests.
Experiential learning (Homework): Learners in gender-based groups under the guidance of a technician/master craftsman undertake some of the control and preventive measures of crop diseases and pest in crop production on the field observing the necessary safety measures. Teacher should encourage all learners to participate in the hands-on practices of controlling pests and diseases in crop production.
Assessment (2.4.1.AS.3). The document marks these depth-of-knowledge levels for this indicator: Level 4 Extended critical thinking and reasoning.
Teaching and Learning Resources:
- Functional internet connectivity
- Pictures of symptoms of diseases and pest infestation on vegetables, arable, cash crops
- Video/picture of control measures of crop diseases and pest
- Knapsack sprayer
- Agro chemicals for treating diseased and pest infested crops