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sick plants Image acknowledgements: Pests and Diseases Image Library (PaDIL) http://www.padil.gov.au CSIRO Department of Entomology scabs Scabs feel bumpy and rough and look brown. They can be found on leaves, stems and fruit. spots Spots can be different colours and sizes. They normally occur on leaves. rots Rots can turn the fruits and stem soft and mushy. They can be different colours. Rots can smell bad. discoloured leaves In some sick plants, the leaves change colour from green to yellow or brown. curled leaves In some sick plants, the leaves can curl up. cankers Cankers are dark spots that appear on the bark of trees The cankers sometimes split open and sap oozes out. chewed leaves These leaves have been eaten by a pest. damaged bark Many pests can damage the bark of trees. damaged fruit and seeds Pests can leave holes in fruit and seeds.