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and greenhouse plantsspring, summer, autumn, winter More common plant problemsAphidsMagnesium deficiencyRustScale insects

, the sweet sticky substance that aphids excrete. Ants are known to defend aphids against predators in return for a harvest of honeydew.Container-grown plants start to wilt. When you check the pot you notice ant tunnels, and that compost has been moved away

to feed. After 2-3 weeks, the larvae pupate inside the leaves and emerge as adults. The damage is mostly cosmetic but where many leaves are affected, the plant may be weakened or die. Different species of leaf miner fly affect specific plants.A maze

Turn over a leaf and you'll see 2mm long white flies. With a life cycle of just three weeks, whitefly breed very fast. Both adults and offspring are sap feeders and a severe attack will weaken a plant. They excrete the sticky excess, called honeydew