caa a22 4500 469042311 CHVBK 20180323132814.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF01974471 doi (NATIONALLICENCE)springer-10.1007/BF01974471 Woodford J. Scottish Crop Research Institute, Invergowrie, DD2 5DA, Dundee, Scotland, UK aut Virus transmission by aphids in potato crops [Elektronische Daten] [J. Woodford] This paper reviews the contribution of vector activity and plant age to virus spread in potato crops. Determining which aphid species are vectors is particularly important for timing haulm destruction to minimize tuber infection by potato virus Y (PVY). Alate aphids of more than 30 species transmit PVY, and aphids such asRhopalosiphum padi, that migrate in large numbers before flights of the more efficient vector,Myzus persicae, appear to be important vectors. Differences in methodology, aphid biotypes and virus strains prevent direct comparisons between estimates of vector efficiencies obtained for aphids in different countries in north western Europe. M. persicae is also the most efficient vector of potato leafroll virus (PLRV), but some clones ofMacrosiphum euphorbiae transmit PLRV efficiently toNicotiana clevelandii and potato test plants. The removal of infected plants early in the season prevents the spread of PLRV in cool regions with limited vector activity. The proportion of aphids acquiring PLRV from infected potato plants decreases with plant age, and healthy potato plants are more resistant to infection later in the season. Severe symptoms of secondary leafroll developed on progeny plants of cv. Maris Piper derived from mother plants inoculated with PLRV in June or July of the previous year. Progeny plants derived from mother plants inoculated in August showed only mild symptoms, but the concentration of PLRV in these plants was as high as that in the plants with severe symptoms. Koninklijke Nederlandse Planteziektenkundige Vereniging, 1992 potyvirus nationallicence PVY nationallicence luteovirus nationallicence PLRV nationallicence Myzus persicae nationallicence Rhopalosiphum padi nationallicence Macrosiphum euphorbiae nationallicence Maris Piper nationallicence Nicotiana clevelandii nationallicence Netherlands Journal of Plant Pathology Kluwer Academic Publishers 98(1992-03-01), 47-54 0028-2944 98<47 1992 98 10658 https://doi.org/10.1007/BF01974471 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01974471 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Woodford J. Scottish Crop Research Institute, Invergowrie, DD2 5DA, Dundee, Scotland, UK aut NATIONALLICENCE 773 0- Netherlands Journal of Plant Pathology Kluwer Academic Publishers 98(1992-03-01), 47-54 0028-2944 98<47 1992 98 10658 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer