Plant Diseases

Question 1

What is powdery mildew?

Answer 1

A fungal disease that causes small patches of grey fluffy fungi to grow on the upper surface of barley plant leaves

Question 2

How is powdery mildew spread?

Answer 2

It’s lightweight spores are carried by workers or by the wind and infects other barley plants

Question 3

What is tobacco mosaic disease?

Answer 3

A disease that discolours plant leaves from green to yellow or white in mosaic pattern

Question 4

What causes tobacco mosaic disease?

Answer 4

Tobacco mosaic virus

Question 5

What are the effects of tobacco mosaic disease?

Answer 5

Discolouration of plant leaves is due to prevention of chloroplast formation

Results in stunted growth due to lower rate of photosynthesis

Question 6

How is tobacco mosaic disease spread?

Answer 6

Direct contact between infected plants, seeds of an infected plant.

Sap of infected plant can also infect others