Plant Diseases (AQA GCSE Combined Science: Synergy: Life & Environmental Sciences): Revision Note
Exam code: 8465
Communicable Diseases in Plants
Communicable/infectious diseases are caused by pathogens and are transmissible (can be spread between individuals within a population)
Both plants and animals can be affected by pathogens
Tobacco Mosaic Virus
Tobacco mosaic virus (TMV) was the first virus to be isolated by scientists
It is a widespread plant pathogen that infects about 150 species of plants including tomato plants and cucumbers
Examiner Tips and Tricks
Know the symptoms and how the pathogen causing each disease is spread. Typically this topic appears as data analysis questions in the exam where you may be given a graph to analyse and interpret.
Rose Black Spot
Rose black spot is a fungal disease of plants where purple or black spots develop on leaves, which often turn yellow and drop early
It affects the growth of the plant as photosynthesis is reduced
It is spread in the environment by water or wind
Rose black spot can be treated by using fungicides and/or removing and destroying the affected leaves
Examiner Tips and Tricks
Know the symptoms and how the pathogen causing each disease is spread. Typically, this topic appears as data analysis questions in the exam where you may be given a graph to analyse and interpret.
Unlock more, it's free!
Join the 100,000+ Students that ❤️ Save My Exams
the (exam) results speak for themselves:
Was this revision note helpful?
