Influence of growth regulator Match and Biological insecticide Agerin on the biology of pupae and Adult of cotton leaf worm Spodoptera littoralis (Boisd) (Lepidoptera : Phalaenidae)

Abstract

This  experiment  was carried  out to evaluate   the efficiency ·of growth regulator  (Match) and biotic pesticides  (Agerin) on the  pupa and adult stages of cotton  leaf worm Spodoptera littoral is {Boisd) that developed from  the  1 51 larval instar  fed on food treated with different concentration  of these pesticides for different' periods. Result  showed that their was a significant  decreases  in pupal period    pupal  weight, pupal   length,   abnonnal   growth   for   pupal   stage      .   A  significant decrease  in the emergence percentage of adults from these pupa , adult longevity ·adult  age , hatchability      gf eggs , male  : female. ratio and abnormal  growth.  for  adult  stage    was also   noted  .  The  laboratory studies showed  that the lOR 's  Match was more effective than Agerin in all concentrations   and periods   of feeding  .The three days feeding periods als.o were  more effective than the- one day feeding  period  in this regard.