1. Plant Disease
  2. Cultivar Susceptibility Tables

Hazelnut Cultivar Susceptibility

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Reviewed: March 2023

Hazelnut (Corylus avellana) Cultivar Susceptibility

Hazelnut Cultivar

Bacterial Blight

Eastern Filbert Blight

Barcelona

S-HS

++++

Butler

?

++++

Casina (W4-6)

?

+++++

Clark

?

++

Daviana

I

++++++

Dorris

S-HS

—

Du Chilly

S

++++++

Dundee

?

++++++

Ennis

S-I

++++++

Gasaway

?

—

Gem

?

+++

Hall’s Giant

R

+++

Jefferson

HS

—

Lewis

?

++

McDonald

S

—

Negret

I

+++++

Newburg

?

++++++

PolyO

?

—

Sacajawea

?

+

Santiam

?

—

Tonda di Giffoni

I

+

Tonda Gentile delle Langhe

?

++++++

Tonda Romana

?

++++++

Wepster

S

—

Willamette

S

+++

Yamhill

S

—

Hazelnut Pollinizers

Delta

?

—

Epsilon

?

—

Eta

?

—

Felix

?

—

Gamma

?

—

Theta

?

—

VR series

?

—

York

S

—

Zeta

?

—

HS = Highly susceptible, S = Susceptible, I = Intermediate,

R = Resistant, MR = Moderately resistant, ? = Unknown

++++++ = Highly susceptible, long canker length, low vigor.

Type cultivar Ennis.

+++++ = Susceptible, long canker length, medium vigor.

++++ = Intermediate susceptibility, good vigor in the presence of EFB.

Type cultivar Barcelona.

+++ = Intermediate susceptibility, but with shorter cankers or fewer stromata than Barcelona, good vigor in the presence of EFB.

++ = Resistant, shorter cankers and with good vigor.

Type cultivar Clark.

+ = Highly resistant, shortest cankers, can become infected but only under very high disease pressure. Type cultivar Tonda

di Giffoni.

— = Also highly resistant but have a single dominant resistant gene.

Cankers may develop but are smaller and heal over.

Type cultivar Gasaway.