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Rose black spot

ES FR EN IT DE PT

Rose black spot

Fungus

What is an opportunist?

An "opportunist" is a population (fungi, bacteria, insects…) that takes advantage of a favourable environment to settle in, multiply and feed on it. It often develops when the natural defences of the affected organism are weakened — for genetic reasons or linked to context (water stress, deficiencies, nutritional imbalances, overcrowding…). This is typically the case in monocultures, where a single host plant, uniform and present in large numbers, offers ideal ground for it to spread.

Identification key : Leaf spots and scabs (fungi) (Damage and symptoms on the host)

Scientific name : Diplocarpon rosae

Other names : Black spot of roses

Fungus specific to roses, found worldwide. It forms black spots with feathery edges surrounded by yellow on the leaves; leaves drop early and the rose weakens. It overwinters in fallen leaves and on stems and spreads with rain splash.

Crops affected : Nursery roses and shrubs

Source : Diplocarpon rosae (DIPCRO)[Overview] — EPPO Global Database — EPPO

This page lists the bio-preparations in the collection that other references associate with this opportunist: Rose black spot.

Warning: the associations between recipes and opportunists come from other references (traditional practices, publications, user feedback). They are neither a recommendation nor a claim of effectiveness. There is no certainty regarding the preparation, application and use of these bio-preparations. See the regulations

No published recipe is associated with this opportunist yet.

See also

Crops

Nursery roses and shrubs

Opportunists of the same crops

Powdery mildew Mites Aphid Spider mite Thrips Rust Caterpillars / worms Botrytis (grey mould) Weevil Ants Xylella fastidiosa Sudden oak death

← Referenced opportunists

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