Pests and diseases Dahlia

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slugs , snails serious pests in parts of world, particularly in spring when new growth emerging through soil. earwigs can disfigure blooms. other main pests encountered aphids (usually on young stems , immature flower buds), red spider mite (causing foliage mottling , discolouration, worse in hot , dry conditions) , capsid bugs (resulting in contortion , holes @ growing tips). diseases affecting dahlias include powdery mildew, grey mould (botrytis cinerea), verticillium wilt, dahlia smut (entyloma calendulae f. dahliae), phytophthora , plant viruses. dahlias source of food larvae of lepidoptera species including angle shades, common swift, ghost moth , large yellow underwing.







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