walnut husk maggot

Asked June 18, 2016, 3:21 PM EDT

WHAT KIND OF SPRAY DO I NEED TO CONTROL THE FLY. WHEN ?

Linn County Oregon insect issues walnut trees horticulture

1 Response

Putting up yellow sticky boards, the more the better is a good deterrent. The catching of the adults also tells when to spray for the WHF.

Sprays - neem oil, permethrin and spinosads work.

Info on the walnut husk fly (WHF)

http://insect.pnwhandbooks.org/nut/walnut/walnut-walnut-husk-fly