Infection and Response

This is an example of a viral pathogen

• TMV affects the growth of the plant due to the lack of photosynthesis that can take place in the affected leaves.

This is an example of a fungal pathogen

• It affects the growth of the plant as photosynthesis is reduced
• It is spread in the environment by water or wind
• It can be treated by using fungicides and/or removing and destroying the affected leaves

This is an example of a bacterial pathogen

• Spread by bacteria ingested in food
• Poultry are vaccinated against salmonella to control the spread
• The bacteria secrete toxins, which can cause fever, cramps, vomiting and diarrhoea