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Ornamentals Advisory Blog

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Powdery mildew on ornamental crops

Powdery mildews are among of the most common diseases of ornamentals; many flowers, vegetables, and woody plants are susceptible. Greenhouse crops prone to infection include Roses, African violet, BegoniaDahlia, gerbera daisy, Hydrangea, roses, Verbena, Kalanchoe, and Poinsettia. Herbaceous perennials particularly susceptible to powdery mildew include Aster, Centaurea, Coreopsis, Delphinium, Monarda, Phlox, Rudebeckia, and Sedum.

Fighting Botrytis in ornamental crops

Botrytis cinerea (grey mould) is one of the most widespread and destructive fungal diseases of ornamental crops. It infects over 200 plant species worldwide causing annual losses of $10 billion to $100 billion. Botrytis cinerea is responsible for the grey mould disease in a number of ornamental crops including roses, carnations, violet, begonia, chrysanthemum, gerbera, dahlia and geranium reducing both quality and yield. In ornamental crops, yield loss can be total because infected cut flowers are rejected at auctions.

Downy mildew in roses

Roses are the leading cut flowers in global floriculture trade. Cut roses, either planted outdoors or in plastic greenhouses are susceptible to many phytopathogens. Downy mildew is among the most serious foliar diseases which affects the quality and yield of cut roses during production. Any damage on leaves, flower buds or stems affects quality standards and impact revenues.

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