Question Constellation Sign up for free AQA · GCSE · Geography · Higher
Pests, diseases and food supply
Explain how pests and diseases can affect food supply.
Write your answer first. You can study the marking guidance whenever you need it.
Study the marking See what earns credit and compare it with a full-mark answer.
Marking points
- 1 Explains at least one way pests or diseases reduce food supply; two basic points or one developed point can earn full marks.
Full-mark answer
Pests such as locusts can eat crops before harvest, so less food is available for people. Plant diseases can also reduce yields or destroy crops, which lowers total food supply.
Why this answer loses marks
Pests are bad for farms.
It needs the mechanism, such as crops being eaten, yields falling, or stored food being lost.