BIOLOGICAL FEATURES OF SORGHUM SHOOTFLY, Atherigona soccata RONDANI LARVAE FED ON SORGHUM AND MAIZE VARIETIES

RELATIVE SUSCEPTIBILITY OF CERTAIN ONION VARIETIES TO THE INFESTATION OF THE ONION THRIPS, Thrips tabaci (LIND.) AND THE ONION MAGGOT, Delia alliaria (MEIGEN) IN UPPER EGYPT