By Karen S. Gibb, John W. Randles (auth.), Kerry F. Harris (eds.)
This sequence explores how vectors (carriers of disorder brokers, akin to bugs) collect, hold and consequently transmit pathogens to hosts. It covers the spectrum of vectors, together with providers of plant pathogens in addition to medically similar pathogens. The Chapters in quantity 7 comprise: 1. K. Gibb, J.W. Randles: Transmission of velvet tobacco mottle virus and comparable viruses by means of the mirid Cyrto- peltis nicotianae. 2. N. Carter, R. Harrington: components influencing aphid inhabitants dynamics and behaviour and the results for virus unfold. three. R.H. Bagnall: Cyclic epidemics of aphid-borne potato viruses in Northern seed-potato-growing components. four. C.J. Andrews, R.C. Sinha: Interactions among barley yellow dwarf virus an infection and winter-stress tolerance in cereals. five. J.R. DeLoach, G. Spates: man made diets for blood feeding bugs: a evaluate. 6. I. Maudlin: Transmission of African trypanosomiasis: interactions between Tsetse immune process, symbionts, and parasites. 7. C. Chastel, I. Humphery-Smith: Mosquito spiroplasmas. the 1st 4 chapters hide issues in plant virus transmission through bugs. the ultimate 3 chapters specialize in human and animal disorder institutions with bollid-feeding flies.
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Extra info for Advances in Disease Vector Research
14:1-59. , Academic Press, New York and London, 897 p. , 1984, Effects of Lygus borealis Kelton (Hemiptera: Miridae) and Adelphocoris lineolatus (Goeze) (Hemiptera: Miridae) feeding on sainfoin seed production. J. Econ. Entomol. 77:966-968. , lines for resistance to Lygus pratensis (Heteroptera: Miridae). J. Econ. Entomol. 76: 1370-1373. , 1980, Fate of plant viruses in mite vectors and nonvectors. , Maramorosch, K. (ed): in Vectors of Plant Pathogens, Academic Press, New York and London, pp. 357-373.
Harrington M. persicae is the more efficient vector of PLRV and PVY, M. euphorbiae may be more important because it survives in larger numbers. Root and sugar beet clamps can be important sources of M. persicae, other vectors of sugar beet viruses, as well as of the viruses themselves (14, 56). Clamps can be much warmer below the surface than is the air outside (14) and, hence, can provide protection for overwintering aphids. If not cleared before sugar beet is planted, clamps can increase the risk of virus infection in adjacent beet crops greatly.
It can be sap-inoculated but with difficulty. It is widespread throughout the beet-growing areas of the world and is confined mainly to the Chenopodiaceae. There are several strains that differ in the severity of symptoms they cause. The virus typically has a half-life of approximately 8 h in the vector and is retained for up to 3 days. It requires acquisition feeds of more than 12 h and inoculation feeds of at least 6 h for maximum transmission. There is no latent period in the aphid and vectors do not retain the virus after molting.