4.3.3.1 Detection and identification of plant diseases
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9 Terms
What does stunted growth on a plant indicate?
Nitrate deficiency
What does spots on leaves of a plant indicate?
Black spot fungus on roses
What does areas of decay on a plant indicate?
Black spot fungus on roses and blights on potatoes
What does abnormal growth on a plant indicate?
Crown galls caused by bacterial infection
What does malformed stems or leaves on a plant indicate?
Aphid infestation
What does discolouration on a plant indicate?
Magnesium deficiency or tobacco mosaic virus
How can you identify the disease a plant has?
Using a gardening manual or website, identifying the pathogen by observing the infected plant in a laboratory, using testing kits that contain monoclonal antibodies
Why is a nitrate deficiency a problem in plants?
It can stunt growth as nitrates in the soil convert sugars made in photosynthesis into proteins which are needed for growth
Why is a magnesium deficiency a problem in plants?
It can cause chlorosis as as magnesium is needed to make chlorophyll which is needed in photosynthesis so if less is being made then parts of the leaves turn yellow