Plant defences and disease

Question 1

How plants protect themselves using physical barriers and chemical substances

Answer 1

plants release hydrogen cyanide to ward off insects and fungi

Question 2

How do we use some of the substances plants make to protect themselves

Answer 2

Plants use epidermic to protect themselves from pathogens and humans use it for general protection

Question 3

How does observing visible symptoms help in the identification of plant disease

Answer 3

gives us idea of
- how bad disease is
- how infection happened
- when it got infected

Question 4

how does distribution analysis help identify plant disease

Answer 4

pattern of infected plants indicate whether pathogen is airborne or in soil

Question 5

How does diagnostic testing help identify plant disease

Answer 5

Rapid testing, detecting pathogens in plants during growing season