Sources of Spring and Fall Hop Aphid, <i>Phorodon humuli</i> (Schrank), (Homoptera: Aphididae) Migrants in South Central Washington
Keywords:
Homoptera, Phorodon humuli, hop, Humulus lupulus, Prunus, host plantsAbstract
The hop aphid, Phorodon humuli (Schrank), flies from hop, Humulus lupulus L., to its overwintering Prunus spp. hosts in the fall. The sources of these aphids were not known because much of the aphid flight occurs after hop plants are removed from fields during harvest. We found that the bottoms of hop plants remaining alive in harvested hop yards averaged 1.7 to 5.8 hop aphids per leaf in three years of sampling. Unharvested hop plants remaining after harvest averaged 32.8 to 127.1 aphids per leaf in two years. Feral hops were also infested with hop aphids in late summer and early fall. Sources for the spring aphid flight from Prunus spp. to hop included Prunus cerasifera Ehrhart, which averaged 44.0 to 105.1 aphids per shoot in two years of sampling. Fruit-type Prunus spp. trees growing on residential properties averaged 0.9 and 11.3 aphids per shoot in the same years but few of these trees were found. Plum and prune orchards averaged 0 to 5.5 aphids per shoot in two years and estimates indicate that orchard trees are much more numerous than other hop aphid host trees. Potential alternative management strategies for hop aphid control are discussed.References
Bishop, G.W. 1967. A leaf roll virus program in Idaho's seed potato areas. American Potato Journal 44:305-308.
Blackman, R.L. and V.F. Eastop. 1984. Aphids on the World's crops: An identification and information guide. John Wiley & Sons, Chichester, UK.
Blackman, R.L. and V.F. Eastop. 1994. Aphids on the World's trees: an identification and information guide. CAB International, Wallingford, UK.
Born, M. 1968. Beiträge zur Bionomie von Phorodon humuli (Schrank, 1801). Archiv für Pflanzenschutz 4:37-52
Campbell, C.A.M. 1985. Has the damson-hop aphid an alate alienicolous morph? Agriculture, Ecosystems and Environment 12: 171-180.
Campbell, C.A.M. and E.L. Tregidga. 2005. Photoperiodic determination of gynoparae and males of damson- hop aphid Phorodon humuli. Physiological Entomology 30: 189-194.
Dixon, A.F.G. and P. Kindlmann. 1990. Role of plant abundance in determining the abundance of herbivorous insects. Oecologia 83:281-283.
Eppler, A. 1986. Untersuchungen zur Wirtswahl von Phorodon humuli Schrk. 1. Besiedelte Pflanzenarten. Anzeiger für Schädlingskunde Pflanzenschutz Umweltschutz 59: 1-8.
Hitchcock, C.L. and A. Cronquist. 1973. Flora of the Pacific Northwest: an illustrated manual. University of Washington Press, Seattle, WA.
James, D.G., T. Price, L.C. Wright, J. Coyle, and J. Perez. 2001. Mite abundance and phenology on commercial and escaped hops in Washington state, USA. International Journal of Acarology 27: 151-156.
Micinski, B. and M. Ruszkiewicz. 1974. Biologia mszycy sliwowo-chmielowej Phorodon humuli Schr. Prace Naukowe Insytutu Ochrony Roslin 16: 79-101.
National Agricultural Statistics Service. 1992. 1992 Census of agriculture - county data. United State Department of Agriculture, http://www.nass.usda.gov/.
National Agricultural Statistics Service. 2002. 2002 Census of agriculture - county data. United State Department of Agriculture, http://www.nass.usda.gov/.
Neve, R. A. 1991. Hops. Chapman and Hall, London.
SAS Institute. 1988. SAS/STAT user's guide, release 6.03. SAS Institute, Cary, NC.
Strong, W.B. and B.A. Croft. 1993. Phytoseiid mites associated with spider mites on hops in the Willamette Valley, Oregon. Journal of the Entomological Society of British Columbia 90: 45-52.
Taylor, L.R., I.P. Woiwod, and R.A.J. Taylor. 1979. The migratory ambit of the hop aphid and its significance in aphid population dynamics. Journal of Animal Ecology 48: 955-972.
Wright, L.C., W.W. Cone, G.W. Menzies, and T.E. Wildman. 1990. Numerical and binomial sequential sampling plans for the hop aphid (Homoptera: Aphididae) on hop leaves. Journal of Economic Entomology 83: 1388-1394.
Wright, L.C., K.S. Pike, D. Allison, and W.W. Cone. 1995. Seasonal occurrence of alate hop aphids(Homoptera: Aphididae) in Washington state. Journal of Agricultural Entomology 12: 9-20.
Wright, L.C. and D.G. James. 2001. Parasitoids of the hop aphid (Homoptera: Aphididae) on Prunus during the spring in Washington state. Journal of Agricultural and Urban Entomology 18: 141-147.
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