Identify and report the presence of pests, diseases and disorders
This subtopic equips learners with the skills to identify common pests, diseases, and disorders affecting trees in a work-based setting. It emphasises accurate reporting to inform management decisions, while ensuring all operations comply with health and safety legislation and environmental good practice to prevent further spread and ecological harm.
Assessment criteria
Topic Overview
The City & Guilds Level 2 Diploma in Work-based Horticulture is a vocational qualification designed for individuals working or seeking work in the horticulture industry. It covers essential practical skills and knowledge required for roles such as gardener, grounds person, or nursery worker. The diploma focuses on plant identification, soil management, plant propagation, and maintenance of gardens and green spaces, ensuring learners can contribute effectively to the sector.
This qualification is part of the City & Guilds Limited Occupational Qualification framework, which emphasises competency-based learning in real work environments. Students develop hands-on skills through workplace assessments and portfolio building, covering topics like health and safety, use of tools and equipment, and sustainable horticultural practices. Mastery of these areas is crucial for career progression and for meeting industry standards in landscaping, amenity horticulture, or production horticulture.
Understanding this diploma is vital because horticulture plays a key role in environmental sustainability, food production, and public wellbeing. By completing this qualification, students gain a recognised credential that opens doors to further study (e.g., Level 3 Diplomas) or employment in a growing sector. The work-based nature ensures that learning is directly applicable to real-world tasks, making graduates job-ready from day one.
Key Concepts
Core ideas you must understand for this topic
- →Plant identification and classification: Understanding botanical names, plant families, and key features for identifying common ornamental and productive plants used in UK horticulture.
- →Soil science and management: Knowledge of soil types, pH, nutrient content, and how to improve soil structure and fertility for healthy plant growth.
- →Plant propagation techniques: Mastery of methods such as seed sowing, cuttings, division, and grafting, including appropriate timing and aftercare.
- →Health and safety in horticulture: Compliance with COSHH regulations, safe use of tools and machinery, manual handling, and risk assessment in outdoor environments.
- →Sustainable horticultural practices: Principles of water conservation, integrated pest management (IPM), composting, and biodiversity enhancement.
Learning Objectives
What you need to know and understand
- Identify and report the presence of pests, diseases and disorders, Be able to work safely and minimise environmental damage, Know how to identify and report the presence of pests, diseases and disorders, Know relevant health and safety legislation and environmental good practice
Assessment Criteria
Key criteria assessors look for in your portfolio
- Award credit for correctly identifying the pest, disease or disorder using distinct signs and symptoms, with reference to a standard guide or digital tool.
- Award credit for producing a clear, factual report that includes tree species, location, severity rating, date of observation, and photographic evidence where possible.
- Award credit for demonstrating safe working practices, including correct use of PPE, following biosecurity protocols such as tool disinfection, and minimising impact on non-target organisms and habitats.
Assessment Guidance
Guidance for achieving higher grades
- 💡Adopt a structured inspection routine: start with overall tree vigour, then systematically check foliage, shoots, branches, trunk, collar, and root zone.
- 💡When reporting, use a standardised format (e.g., date, species, GPS coordinates, symptoms, signs, severity scale, photos) to ensure all necessary information is captured.
- 💡Explicitly reference relevant legislation and codes of practice, such as the Control of Pesticides Regulations, Wildlife and Countryside Act, and industry biosecurity guidance, to demonstrate compliance.
- 💡When answering questions about plant care, always link your answer to specific plant examples (e.g., 'Roses require deep watering at the base to avoid powdery mildew'). This shows applied knowledge.
- 💡For practical assessments, demonstrate safe working practices consistently—examiners look for correct tool handling, tidy work areas, and use of personal protective equipment (PPE).
- 💡In written exams, use horticultural terminology accurately (e.g., 'axillary bud' instead of 'side shoot') and explain the 'why' behind techniques, not just the 'how'.
Common Mistakes
Common errors to avoid in your coursework
- Confusing signs (direct evidence like frass or fungal brackets) with symptoms (host responses like dieback or chlorosis), leading to misidentification.
- Failing to clean and disinfect tools between inspections, which can spread pathogens such as Phytophthora or fire blight.
- Providing vague or incomplete reports that omit critical details such as specific location within the tree, extent of damage, or recent site history.
- Misconception: 'All plants need the same type of soil.' Correction: Different plants have specific soil requirements; for example, ericaceous plants need acidic soil, while many vegetables prefer neutral to slightly alkaline conditions.
- Misconception: 'Pruning is only for shaping plants.' Correction: Pruning also promotes healthy growth, removes diseased or dead wood, and can increase flowering or fruit yield when done correctly according to species and season.
- Misconception: 'Fertiliser is always beneficial.' Correction: Over-fertilising can harm plants, cause nutrient runoff, and damage soil microorganisms. Soil testing is essential to apply the right type and amount.
Frequently Asked Questions
Common questions students ask about this topic
Pass / Merit / Distinction Evidence Checklist
How your portfolio evidence is graded for CITY & GUILDS LIMITED Identify and report the presence of pests, diseases and disorders
Every vocational unit is marked against named criteria rather than an exam percentage. Your tutor's brief lists the exact codes for this unit — here is what each band is asking you to do.
Demonstrate baseline knowledge, accurate terminology, and core practical application.
Provide detailed analysis, structured explanations, and clear workplace reasoning.
Deliver thorough evaluation, original problem solving, and fully justified recommendations.
Before You Start
Prior knowledge that will help with this topic
- •Basic understanding of plant biology (e.g., parts of a plant, photosynthesis) is helpful before starting the diploma.
- •Familiarity with health and safety principles in a work environment, as this is a core component assessed throughout.
- •Some practical experience in gardening or landscaping can provide context, though the diploma is designed for beginners.
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Key Terminology
Essential terms to know
- Identify and report the presence of pests, diseases and disorders, Be able to work safely and minimise environmental damage, Know how to identify and report the presence of pests, diseases and disorders, Know relevant health and safety legislation and environmental good practice
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