biopreparados.es

Olive leaf spot

Olive leaf 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 : Venturia oleaginea (also Spilocaea oleaginea)

Other names : Peacock spot

Fungus specific to the olive tree that survives in infected leaves remaining on the tree. Its spores are spread by rain, and infections are most frequent in autumn and winter in mild, wet weather. Dark round spots surrounded by a yellowish halo appear on the upper side of the leaves, resembling the eye of a peacock feather; affected leaves turn yellow and drop, which weakens the tree.

Crops affected : Olive tree

Source : Venturia oleaginea (CYCLOL)[Overview] — EPPO Global Database — EPPO

This page lists the bio-preparations in the collection that other references associate with this opportunist: Olive leaf 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

Olive tree

Opportunists of the same crops

Bacterial diseases Olive fruit fly Stolbur (bois noir) California red scale Olive moth Xylella fastidiosa Black scale False codling moth Brown marmorated stink bug

← Referenced opportunists