WorksheetsCrop Protection
Total questions: 10
Worksheet time: 8mins
Which statement is correct for all weeds in a crop?
They compete for moisture
They contaminate seed samples
They make crop poisonous
They slow the rate of harvesting
How does a herbicide improve crop yield?
It adds nutrients to the soil
It controls plant diseases
It destroys pest organisms
It reduces weed competition
A herbicide is sprayed to kill weeds. It is absorbed by the leaves and moves through the stem to all parts of the plant. What is this type of herbicide called?
Contact
Residual
Selective
Systemic
A growing cereal is infested with broad-leaved weeds. Which type of herbicide that can be used to kill this weed?
Contact
Pre-emergent
Selective
Systemic
What best controls sap-sucking pest on a cereal crop?
Contact fungicides
Contact insecticides
Systemic fungicides
Systemic insecticides
What may be controlled by spraying a crop with systemic insecticide?
Broad-leaved weeds
Fungal disease
Grass weeds
Viral diseases
A cereal crop has been sprayed with a chemical insecticide. Why should it be left two weeks before harvesting?
Spraying slows the ripening of the grain
The insecticide is harmful if eaten by mammals
Time is needed for the insects to drop off
Time is needed for the insecticide to take effect
What describes a biological control of a crop pest?
Introducing predators of the pest to the crop
Planting the crop when the pest is not present
Rotating the crop to break the life cycles of the pest
Spraying the crop with natural pesticide
A crop is sprayed with insecticide. After spraying, what damage will it do to the environment?
Leaving the crop two weeks before harvesting
Not wearing protective clothing when spraying
Spraying close to the ground
Washing the sprayer in a stream
What is a method of biological pest control?
Catching the pest in traps
Introducing a predator which eats the pest
Killing the pest with pesticide
Removing the pests with a hoe
