Hazelnut Cultivar Susceptibility

Hazelnut (Corylus avellana) Cultivar Susceptibility

Hazelnut Cultivar

Bacterial Blight

Eastern Filbert Blight

Barcelona

HS

++++

Butler

?

++++

Casina (W4-6)

?

+++++

Clark

?

++

Daviana

I

++++++

Dorris

?

Du Chilly

S

++++++

Dundee

?

++++++

Ennis

?

++++++

Gasaway

?

Gem

?

+++

Hall’s Giant

R

+++

Jefferson

?

Lewis

?

++

McDonald

?

Negret

I

+++++

Newburg

?

++++++

Sacajawea

?

+

Santiam

?

Tonda di Giffoni

I

+

Tonda Gentile delle Langhe

?

++++++

Tonda Romana

?

++++++

Wepster

?

Willamette

S

+++

Yamhill

?

Hazelnut Pollinizers

Delta

?

Epsilon

?

Eta

?

Felix

?

Gamma

?

Theta

?

VR series

?

York

?

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.