000			02675nam a2200217 4500
003			OSt
005			20250207161654.0
008			250207b |||||||| |||| 00| 0 eng d
040			_cUAS Dharwad
041			_aEnglish
082			_a595.7 _bDES
100			_aDesai Kavita C.
245			_aInvestigations on Acorus calamus Based Silver and Zinc Nanoparticles Against Sitophilus Oryzae and Corcyra Cephalonica
250			_aM.Sc. (Agri)
260			_aDharwad _bUniversity of Agricultural Sciences _c2024
300			_a125 _c32 Cms
520			_aABSTRACT Investigations on biosynthesis and evaluation of silver (AgNPs) and zinc nanoparticles (ZnNPs) synthesized using sweet flag rhizome extract against Sitophilus oryzae and Corcyra cephalonica in wheat were carried out at the University of Agricultural Sciences, Dharwad, Karnataka. The bioactive compounds present in the extract act as both reducing and stabilizing agents for synthesis of nanoparticles. AgNPs and ZnNPs showed maximum UV absorption peak of at 437 nm and 356 nm, respectively, with mean diameters of 42.08 nm and 32.68 nm. SEM images showed that AgNPs exhibited spherical to irregular shapes, while ZnNPs showed sheet-like to irregular shapes. EDX spectral images confirmed their elemental composition and XRD pattern indicated their crystalline nature. FTIR spectroscopy showed the involvement of organic groups responsible for capping and stabilizing the nanoparticles. To standardize the concentrations for bioefficacy studies, different concentrations of AgNPs and ZnNPs ranging from 500 to 2500 ppm against S. oryzae and C. cephalonica were evaluated by observing mortality rates. As the concentration and days after treatment (DAT) increased, per cent mortality also increased. Among the different concentrations, AgNPs and ZnNPs both at 2500 ppm proved to be effective by recording cent per cent mortality against S. oryzae and C. cephalonica. Repellency tests showed higher efficacy for AgNPs compared to ZnNPs on S. oryzae. Among silver and zinc nanoparticles, AgNPs at 2500 ppm was proved to be most effective against S. oryzae by completely inhibiting adult emergence, seed damage and weight loss up to 90 DAT during storage. This effectiveness was comparable to that of chemical check Deltamethrin. ZnNPs at 2500 ppm also resulted in least population buildup, seed damage and weight loss at 90 DAT. AgNPs additionally enhanced seed germination. Further, AgNPs and ZnNPs at 2500 ppm showed cent per cent mortality of C. cephalonica at 15 DAT.
650			_aAgricultural Entomology
700			_aKambrekar D. N.
942			_cTH _eM.Sc. (Agri) _h595.7 _kDES _n0 _6595_700000000000000
999			_c70808 _d70808