Preventing and Controlling Plant Disease Flashcards

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Note: We may include questions that have multiple correct answers. It's useful to remember specific examples to understand these concepts better.

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Why is it important to prevent plant diseases in crop plants?

Plant diseases can reduce yield, waste food, and cost farmers and countries money.

It removes the source of pathogens, so they cannot spread to healthy plants.

Crop rotation means changing the type of crop in a field each year. It stops soil pathogens building up that attack one type of plant.

These plants have traits that make infection less likely, so fewer plants become ill.

Fungicides are chemicals that kill or stop fungi, which can cause plant disease.

Many plant viruses are carried by insects. Killing or removing the insects stops them passing on the virus.

Biological control uses living organisms, such as ladybirds, to eat pests that damage plants or spread disease.

Cleaning tools, boots, and machines and removing dead plant material reduce the spread of pathogens.

They are checked to be free of important pathogens, so new diseases are less likely to enter a field.

The closed space keeps out many pests and wind-blown spores, and conditions can be controlled.

New plants are kept apart for a time and watched for disease. This helps stop hidden infections reaching other plants.