Thumbnail Image

Thesis

Browse

20221
Reset filters
Subject: Microbiology × Author: Bharti, Kajal × End date: 2023 × Start date: 2020 × Thesis Type: M.Sc ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemEmbargo
    Compatibility study of Metarhizium rileyi (Farlow) Kepler, S.A. Rehner and Humber with other bioagents and its pathogenicity against Spodoptera frugiperda
    (Punjab Agricultural University, Ludhiana, 2022) Bharti, Kajal; Joshi, Neelam
    Three Metarhizium rileyi isolates (M. rileyi NIPHM, M. rileyi MTCC 4254 and M. rileyi MTCC 10395), one local and one commercial formulations of Metarhizium anisopliae were evaluated for their pathogenicity against Spodoptera frugiperda. Maximum percent mortality 50.0% was recorded in M. rileyi MTCC 4254 @ 12 g/l which was at par with commercial formulation of M. anisopliae (53.33%) at same concentration. Bio-safety of M. rileyi formulations on emergence of T. chilonis was studied. Minimum percent reduction in adult emergence over control (17.09%) was recorded by M. rileyi NIPHM followed by M. rileyi MTCC 4254 (17.23%) at higher concentration. However, chemical insecticide Coragen 18.5% SC @ 0.4 ml/l (chlorantraniliprole) and Delegate 11.7% SC @ 0.4 ml/l (spinetoram) recorded 42.09 percent and 62.46 percent reduction in adult emergence over control respectively. Compatibility studies of M. rileyi with chemical insecticides, biological insecticides, azadirachtin and other entomopathogenic fungal strains were recorded. Maximum radial growth (4.7±0.28) was recorded by M. rileyi MTCC 4254 when media was supplemented with Delfin WG @ 6 g/l. The chemical insecticide Coragen 18.5% SC and Delegate 11.7% SC recorded 50.74% and 71.64% growth reduction over control (@ 0.4 ml/l) respectively. Neem based formulations, Ecotin (Azadirachtin 0.03% EC) and Indo neem (Azadirachtin 0.15% EC) recorded 44.77% and 53.73 percent growth reduction over control @ 1.5 ml/l and @ 5 ml/l concentration respectively. Compatibility of M. rileyi was maximum with M. anisopliae (Ma-35) and commercial formulation of M. anisopliae and was least compatible with commercial formulation of L.lecanii.