Q26

Criteria	Marks
Describes a named plant disease and its effects on agriculture	4
Outlines a plant disease and its effect on agriculture	3
Demonstrates some understanding of a plant disease or its effects on agriculture	2
Provides some relevant information	1

Sample answer:

Stone fruit scab

This is a fungal disease that affects stone fruit such as plums, peaches and nectarines. It starts as small dark spots on the fruit which later become scabby and may cause the fruit to crack, shrivel and fall off the plant.

It causes downgrading of fruit quality and decreased fruit yield, leading to economic losses.