Faculty of Biotechnology Vision and Mission

Fungal infection

Viral infection

Chemical poisoning

Bacterial infection by Agrobacterium (correct)

Because earlier symptoms are subtle and easily missed (correct)

Because plants do not show symptoms until they become severe

Because symptoms of diseases are diverse and range from biochemical perturbations to death

Because pathogens are usually microscopic or sub-microscopic in size

The pathogen itself is often visible to the naked eye

The symptoms are obvious but the pathogen itself is likely to be microscopic or sub-microscopic (correct)

The symptoms are subtle and easily missed initially

The symptoms cause death of the whole plant

<p>The pathogen itself</p> Signup and view all the answers

<p>Robert Koch</p> Signup and view all the answers