Leaves of lemongrass and Pigeon berry belonging to two different plant families were extracted in water, petroleum ether and acetone, in addition, to two biopesticides, a bacterial one (Dipel 2X) and entomopathogenic fungi (Biofly) and their mixtures with the two plants used extracted in water in controlling the pink stem borer Sesamia cretica Led. in maize fields during the early summer plantation 2010 season. Data demonstrated that both of lemongrass extract in water, acetone and their mixtures with Biofly achieved the highest reduction percentages in egg-masses. Also, extract of Pigeon berry in acetone showed the highest reduction percentages in the two symptoms of infestation (perforated leaves and dead hearts), the same percentages were obtained either from Pigeon berry with Dipel or Dipel 2X alone in the dead heart cases. (The harvest maize yield was calculated after 120 days from sowing as ardab / feddan). Data obtained from laboratory tests was almost in the same trend as those obtained in the field in which the shortest LT50 values at 5% concentration were calculated for all the treatmnets. It could be concluded that plant extracts which resulted in the highest reduction percentage in egg-masses, larvae and dead heart cases were the same in obtaining the heaviest yield besides decreasing the environment pollution and definitely more save for farmers in comparison with the recommended chemical pesticide.