Biological control efficiency of Orius similis Zheng (Hemiptera:Anthocoridae) on Frankliniella occidentalis (Pergande) under different spatial and caged conditions EXPERIMENTAL STUDIES ON ACARINE PREDATOR-PREY INTERACTIONS INTERFERENCE AND SEARCHING EFFICIENCY (ACARINA: PHYTOSEIIDAE) Parasitic activity of three indigenous Trichogramma species to different density eggs of Leguminivora glycinivorella and their intraspecific interferences on parasitism