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Helping farmers find, destroy, and manage EFB


Scouting

Scouting for early detection is our most important activity for ALL hazelnut growers. Growers from Eugene to Salem must be as vigilant as growers in the greater Portland area. It works! Scout your orchards at least twice a year. 

We recommend that you scout your orchard for EFB at least twice a year. Look for flagging (dying) branches in the summer and characteristic EFB cankers in the winter. Cankers can be found on any part of the tree but are more frequently found near the top. Scout intensively during the winter, particularly on clear days. A pruning tower (tree squirrel) and/or binoculars are very helpful to locate cankers. All orchards in Oregon are at risk and should be scouted, even orchards near Eugene.

There was a situation near Salem where a grower discovered two trees infected with EFB in a newly
planted hazelnut orchard. It was suspected that the trees were infected in the nursery before shipment. Early detection, quick scouting and tree removal on the part of many people helped eradicate EFB from that orchard.

When the canker finally girdles a branch the leaves rapidly wilt and die due to lack of water. The brown leaves may remain attached to the branch for some time.
The brown leaves may remain attached to the branch for some time.
Photo by Jay Pscheidt, 1992. 

Management Tour
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Management Pages
Scout
Replace Pollinizers
Apply Fungicides
Remove Cankers
Plant Resistant Cultivars
Destroy Escaped Seedlings
Burning Rules
Where to Focus 
Your Resources

Mature, black stromata arranged in rows. Note the sunken area where the stomata are located or the raised area next to the canker. Tree cells in the cankered area are dead and do not continue to grow.
Mature black stromata
Photo by Jeff Stone, 1988.

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