plant diseases

Question 1

give details of ring rot (5)

Answer 1

it is a bacterial disease caused by gram positive bacteria, it damages leaves, tubers and fruit, there is no cure. it affects potatoes, aubergines and tomatoes.

Question 2

give two plant diseases caused by fungi and give details.

Answer 2

potato blight when fungus hyphae penetrates host cell destroys leaves, tubers and fruit. no cure but resistant strains and chemicals can help manage.

black Sigatoka - affects bananas, hyphae penetrates and digests cells turning them black. resistant strains are being developed, fungicides can control the spread. no cure.

Question 3

give details on TMV

Answer 3

Tobacco mosaic virus affects tomatoes, peppers and cucumbers. stunts growth. damages leaves, fruit and flowers. resistant strains are being developed but there is no cure.