?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=S&rft.au=Gopalakrishnan%2C+S&rft.aulast=Gopalakrishnan&rft.atitle=Efficacy+of+botanical+extracts+and+entomopathogens+on+control+of+Helicoverpa+armigera+and+Spodoptera+litura&rft.title=African+Journal+of+Biotechnology&rft.issn=1684-5315&rft.date=2011&rft.volume=10&rft.pages=16667-16673&rft.issue=73&rft.genre=article