Mealybugs, a family of soft, oval-bodied pests (Homoptera: Pseudococcidae), are known vectors (carriers) of the grapevine leafroll associated viruses (GLRaVs) of grape. This document gives details on how pheromone traps should be used to ensure optimal catches and early detection.
A parasitic wasp, Trioxys pallidus Haliday
(Hymenoptera: Aphidiidae) was imported from Europe and
initially released against the filbert aphid Mvzocallis
coryli (Goetze) in hazelnut (filbert) orchards of the
Willamette Valley, Oregon beginning in 1984. In the
present study, I investigated the establishment rates of
this parasitoid. A total of 13...
The insects that invade a dying or dead tree are the immediate cause of death and the principle mediators of early stages of decomposition of the tree. These insects form a large and complex community, the species
components of which are restricted to particular habitats. A study of
the insect...
Seasonal synchrony between the filbert aphid,
Myzocallis coryli (Goetze) and its newly introduced
parasitoid Trioxys pallidus Haliday was examined in the
field to evaluate the effectiveness of parasitoid based
biological control in filbert orchards of Oregon. Fieldemergence
observations showed that 50% eclosion of the aphid
occurred 14 days before that...
The European hazelnut, Corylus avellana L., was imported into the U.S. in the late 1800's and is now grown throughout the Willamette Valley in Oregon. A native species of hazelnut, C. cornuta Marshall, is a common shrub found in forested areas of the Pacific Northwest. Foliage of both C. avellana...
Levels of resistance to six selected insecticides of
eleven field populations of the filbert aphid Mvzocallis
coryli (Goetze) were determined by using the leaf-dip
residue technique. Test insecticides included compounds
widely used in commercial filbert orchards, namely,
carbaryl, diazinon, endosulfan, phosalone, fenvalerate and
oxydemetonmethyl. Aphid samples were collected within a...
The publication provides vineyard owners with approaches for finding the first occurrence of grape powdery mildew. The publication covers tactics to manage powdery mildew, including use of fungicides and canopy management. It also discusses effective scouting techniques based on the key characteristics of the fungus.