TY JOUR TI Flying features of winged aphids on potato seed plants during 2004-2006 KW potato KW potato virus KW vectors of viruses KW a critical threshold size KW the vector activity of aphids. JO Vestnik of Kazan State Agrarian University AU Zamalieva, F.. AU Prishchepenko, E.. PY 2013 IS 8 PB Kazan state agrarian University