?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=Y+V+N&rft.au=Sushma%2C+Y+V+N&rft.aulast=Sushma&rft.inst=Nagarjuna+University%2C+Guntur&rft.date=2000&rft.title=Management+of+Helicoverpa+armigera+(Hubner)+using+microorganisms+and+plant+products&rft.tpages=36&rft.degree=Masters