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Stylet activities and potato virus Y vector efficiencies by the aphids Brachycaudus helichrysi and Drepanosiphum platanoidis |
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| Authors: | G Powell R Harrington and N J Spiller |
| Institution: | (1) A.F.R.C. Linked Research Group in Aphid Biology, Department of Biology, Imperial College at Silwood Park, SL5 7PY Ascot, Berks, England;(2) Present address: A.F.R.C. Institute of Arable Crops Research, Department of Entomology & Nematology, Rothamsted Experimental Station, AL5 2JQ Harpenden, Herts, England;(3) Present address: Wellcome Environmental Health, McIntyre House, HP4 2DY Berkhamsted, Herts, England |
| Abstract: | Stylet penetration activities of two aphid species were recorded electrically and compared with their efficiency of potato virus Y transmission. B. helichrysi (Kltb.) acquired the virus during 15% of single penetrations on infected leaves. These acquisitions were associated with the occurrence of cell membrane puncture by stylets, recorded during 44% of the penetrations. D. platanoidis (Schrank) punctured membranes during only 8% of penetrations, and its acquisition efficiency was less than 1%. The frequency with which aphids puncture cell membranes appears to partially determine their vector efficiency. |
| Keywords: | Aphids Brachycaudus helichrysi Drepanosiphum platanoidis electrical penetration graphs potato virus Y stylet activities vector efficiency |
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