@ARTICLE{Korcz_Alicja_The_2001,
 author={Korcz, Alicja},
 number={No 2},
 journal={Journal of Plant Protection Research},
 pages={153-163},
 howpublished={online},
 year={2001},
 publisher={Committee of Plant Protection PAS},
 publisher={Institute of Plant Protection – National Research Institute},
 abstract={Piesma quadratum is the only vector of beet leaf curl - virosis affecting sugar beet. The sugar content of beets infected by beet leaf curl is reduced by an average of 9% and the root weight is decreased by an average of 58.4%. P quadratum appeared in Poland in the beginning of this century after migration from the territory of Germany. This bug has one generation a year. Its occurrence is characterised by 2-3-years-long gradations in periods of every 9-11 years. Chemical control of beet leaf bug caused disturbance of this rhythm. Recent gradations of the pest occurred every 17 years.},
 type={Article},
 title={The forecasting possibilities of the appearance of the pest creating gradiations on the example of beet leaf bug (Piesma quadratum Fieb. Heteroptera: Piesmatidae)},
 URL={http://www.journals.pan.pl/Content/131144/PDF-MASTER/10_PLANT_41_2_2001_Korcz_The_Forecasting.pdf},
 keywords={Piesma quadratum, harmfulness, beet leaf curl, BLCV, gradations},
}