@ARTICLE{Kostiw_Michał_The_2002,
 author={Kostiw, Michał},
 number={No 2},
 journal={Journal of Plant Protection Research},
 pages={165-171},
 howpublished={online},
 year={2002},
 publisher={Committee of Plant Protection PAS},
 publisher={Institute of Plant Protection – National Research Institute},
 abstract={The investigations were carried out at Bonin during I 996-1999. The aim of the study was the comparison of PVY, PVS, PVM and PLRV infection pressure in different periods of growing season. The PVY pressure was the greatest. The mean (of 4 years) infection was 32%. Evidently lower infection was observed for PVS (19%) and PVM (7%) and extremely low for PLRV (only O.Ol%). The most intense spread of PVY, PVS and PVM took place from second IO days of July until first ten days of August.},
 type={Article},
 title={The spread of PVY, PVM, PVS and PLRV at Bonin conditions during 1996-1999},
 URL={http://czasopisma.pan.pl/Content/131056/PDF-MASTER/10_PLANT_42_2_2002_Kostiw_The_Spread.pdf},
 keywords={aphids, potato viruses},
}