Genetics, gene flow, and distribution of pesticide
resistance traits were examined for organophosphate (OP)
resistance in three beneficial phytoseiid mites. Levels
and genetics of OP resistance in Amblyseius andersoni
were examined first. Laboratory strains from Italy and
Oregon, USA, were compared in susceptibility to
insecticides used in western Oregon fruit...
Dispersal and colonization of young potted apple
trees by the spider-mite predators Metaseiulus
occidentalis Nesbitt and Typhlodromus pyri Scheuten
were studied in the Hood River Valley of Oregon.
Experimental mini-orchards of 10 four-year old potted
apple trees were established at distances of 0, 10, and
100 m downwind from commercial...
Landscape heterogeneity is thought to differ among farm management types (i.e. organic and conventional), and this difference is hypothesized to result in variations in pest control by natural enemies. However, it is unclear if these variations in pest control are driven by landscape structure or by farm management practices themselves....
Aggregation and species association of 9 species of phytophagous and
predaceous mites were studied for 6 yr in an orchard with 100, 2 m tall 'Red
Delicious' apple trees. To quantify aggregation, a method was developed that is
powerful, and easily interpreted. It relates the proportion of habitat occupied to...
Proceedings of the 76th Annual Western Orchard Pest and Disease Management Conference, held January 9-11, 2002 at the Imperial Hotel in Portland, Oregon.
Proceedings of the 77th Annual Western Orchard Pest and Disease Management Conference, held January 15-17, 2003 at the Hilton Portland in Portland, Oregon.
Specialist and generalist phytoseiid mites are widely used for biological
control of spider mites. Understanding dispersal attributes of these mites is
important to implementing more stable, cost-efficient integrated pest management.
In this regard, we studied dispersal of phytoseiid mites from a local ambulatory
phase of movement within a prey patch...
Methyl salicylate (MeSA), a herbivore-induced plant volatile, can elicit control of pests through attraction of beneficial arthropods. This study evaluates the effect of synthetic MeSA lures (PredaLure) on arthropod populations during the 2009 and 2010 seasons in two Oregon vineyards (Dayton and Salem). MeSA lures were deployed at a low...
During summer of 1998 and 1999, 34 and 10 vineyard sites, respectively, were sampled to assess spider mite pests and associated biological control by phytoseiid mites. Vineyards studied spanned five major valleys in western Oregon where grape production occurs. Leaf samples were taken from site perimeters and centers. One leaf...
Proceedings of the 73rd Annual Western Orchard Pest and Disease Management Conference, held January 6-8, 1999 at the Imperial Hotel in Portland, Oregon.