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This lesson covers plant disease as required by the Edexcel GCSE Combined Science specification (1SC0). You need to understand how plant diseases can be detected, the effects of mineral deficiencies on plants, and the defence responses plants use to protect themselves against pathogens and herbivores.
Plants, like animals, can be infected by pathogens (bacteria, viruses, fungi and protists). Plants can also suffer from mineral deficiencies caused by a lack of essential minerals in the soil.
Plant diseases are a major concern in agriculture because they can reduce crop yields, leading to food shortages and economic losses.
Plant diseases can be detected in several ways:
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