With color photos and text, describes principal insect pests of hazelnuts (filberts) including their life stages, symptoms of infestation, and techniques for sampling population levels. Also describes beneficial insects (generalist natural enemies) that can combat pest insects.
A light and electron microscope study of Corylus avellana L.
vegetative buds infested with the eriophyoid mites, Cecidiophyopsis
vermiformis Nal. and Phycoptella avellanae Nal., is reported. Descriptions
are given of changes in infested stipule tissue. The
nipple-like proliferations (enations) which arise on the infested
stipule surface are covered by a...
"'Yamhill' (OSU 542.102) was developed and evaluated by the hazelnut breeding program at Oregon State University, Corvallis, Oregon, and was released in January 2008. Trees of 'Yamhill' are completely resistant to eastern filbert blight (EFB) caused by Anisogramma anomala (Peck) E. Müller. Compared to 'Barcelona', trees of 'Yamhill' are smaller...