Abstract:The present work was carried out to study the effect of four nitrogen fertilizer levels (40, 60 80 and 100 Kg. N./Feedan) on the infestation by beet fly, Pegomya mixta and sucking insects, Aphis gossypii, Bemisia tabaci and Empoasca lybica as well as sugarbeet yield during two successive seasons (2005/2006 and 2006/2007) in Mallawi, El-Minia Governorate. In both seasons, the highest rates of infestation by P. mixta larvae as well as nymphs and adults of A. gossypii, B. tabaci and E. lybica were obtained from … Show more
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