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Basil downy mildew

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Basil downy mildew

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 : Downy mildew and late blight (oomycetes) (Damage and symptoms on the host)

Scientific name : Peronospora belbahrii

Other names : Downy mildew of basil

Oomycete described in the 2000s that has spread rapidly worldwide, partly with seed. Basil leaves yellow between the veins and show a dark grey to purplish growth on the underside. It needs wet leaves and high humidity; it has also been reported on other Lamiaceae such as rosemary.

Crops affected : Basil, Lavender, Rosemary

Source : Peronospora belbahrii (PEROBE)[Overview] — EPPO Global Database — EPPO

This page lists the bio-preparations in the collection that other references associate with this opportunist: Basil downy mildew.

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

Basil Lavender Rosemary

Opportunists of the same crops

Tomato spotted wilt virus Stolbur (bois noir) Rosemary beetle Xylella fastidiosa Chilli thrips Brown marmorated stink bug

← Referenced opportunists

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