Bio resources: Agricultural (biotic)

A Level Environmental Science revision

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Last updated: June 2, 2025

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First submitted	June 2, 2025
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Hint	Answer
Biotic factors	Pests
Biotic factors	Pollinators
Biotic factors	Soil biota
Pests reduce	Agricultural productivity
Pests reduce	Product quality
Pest types	Weeds
Pest types	Insects
Pest types	Fungi
Pest types	Bacteria
Pest types	Molluscs
Pest types	Nematode worms
Pest types	Vertebrates
Insect example	Aphids
Fungus example	Potato blight
Pest types (vs)	Endemic, epidemic
Pest types (vs)	Indigenous, Introduced
Cultural controls	Crop rotation
Cultural controls	Companion crops
Cultural controls	Barrier crops
Cultural controls	Sacrificial crop
Cultural controls	Predator habitats
Cultural controls	Biological Control Agents
Cultural controls	Sterile male techniques
Cultural controls	Pheromone traps
Cultural controls	Genetic modification
Chemical controls	Pesticide
Chemical controls	Antibiotics
Comapanion crop example	Legumes
Barrier crop example	Onion
Sacrifical crop example	Flowers
Companion crop disadvantages	Less harvestable crop
Companion crop disadvantages	Increased competition
Predator habitats disadvantages	Difficult to operate machinery
Successful BCA	Cactoblastis
Successful BCA	Parasitic wasps
Unsuccessful BCA	Cane toads
Sterile male technique	Exposure to gamma rays
Successful sterile males	Mediterranean Fruit Fly
Unsuccessful sterile males	Mosquitos
Unsuccessful sterile males	Altered behaviour caused rejection
Pesticide application techniques	Contact
Pesticide application techniques	Systemic
Antibiotic uses	Growth promoters
Antibiotic uses	Prevent infections
Antibiotic uses	Treat infections
Hormonal pesticides kill pests through...	Biochemical actions
Hormonal pesticides start...	Natural processes that cause death
Pollinator protection	Pesticide controls
Pollinator protection	Planting flowers
Pollinator protection	Providing habitats
Pollinator protection	Bee hives
Controlling food chain energy losses	Temperature control
Controlling food chain energy losses	Movement control

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