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Hazelnut weevil

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Hazelnut weevil

Insect — Coleoptera

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 : Legless larva with a head (weevils, seed beetles, bark beetles, wasps) (Larva) Weevils (Adult (and nymphs resembling the adult))

Scientific name : Curculio nucum

Other names : Nut weevil

Brown weevil 6 to 9 mm long with a very long, slender snout. In spring the female drills into a young hazelnut and lays an egg; the white larva eats the kernel and leaves in autumn through a round hole to overwinter in the soil. Attacked nuts often drop early.

Crops affected : Hazelnut tree

Source : Curculio nucum (CURCNU)[Overview] — EPPO Global Database — EPPO

This page lists the bio-preparations in the collection that other references associate with this opportunist: Hazelnut weevil.

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

Hazelnut tree

Opportunists of the same crops

San José scale Sudden oak death Common cockchafer (white grub) Brown marmorated stink bug

← Referenced opportunists

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