EVALUATION OF PHYTOSOCIOLOGICAL, NATURAL REGENERATION AND SITE CHARACTERISTICS OF Rhododendron campanulatum D. Don IN ALPINE REGION OF WESTERN HIMALAYAS

Simple item page
dc.contributor.advisorVERMA, SUBHASH CHANDER
dc.contributor.authorBHISHAM, DEV
dc.date.accessioned2020-09-22T07:28:26Z
dc.date.available2020-09-22T07:28:26Z
dc.date.issued2020-08
dc.description.abstractABSTRACT The efficacy of Metarhizium(=Nomuraea) rileyi (Farlow) Kepler, S.A. Rehner and Humber was studied against different larval instars of Helicoverpa armigera (Hubner) by larval dip method. M. rileyi when applied against different larval instars of H. armigera at concentrations between 102-108 conidia/ml resulted 20-96.67, 16.67-93.33, 20-83.33, 16.67- 76.67 and 13.33-53.33 per cent mortality of 1st, 2nd, 3rd, 4th and 5th instar larvae, respectively. LC50 and LC90 values for different instars were 5.51 x 103, 6.87 x 104, 2.81 x 105 and 5.55x 105 ; and 2.86 x 106, 1.56 x 107, 1.72 x 109 and 2.87 x 109 conidia/ml against 1st, 2nd, 3rd and 4th instar larvae, respectively. M. rileyi at 107 conidia/ml took 5.48, 6.26, 8.16 and 8.44 days to kill 50 per cent and 10.19, 9.88, 13.91 and 14.39 days to kill 90 per cent of 1st, 2nd, 3rd and 4th larvae of H. armigera, respectively. Azadirachtin (1.02ppm), azadirachtin (1.53ppm) and indoxacarb (0.72ppm) inhibited the growth of M. rileyi by 47.31, 62.47 and 72.39 per cent, respectively. However, M. rileyi at concentrations of 102 to 107 conidia/ml mixed with azadirachtin (1.02ppm) and indoxacarb (0.72ppm) and tested against second instar larvae resulted 10.34-96.55 (LC50: 1.09 x 104, LC90: 2.39 x 106 conidia/ml) and 14.29-92.86 per cent (LC50: 1.37 x 104, LC90: 6.73 x 106 conidia/ml) mortality, respectively. Similarly M. rileyi at concentrations of 103-108 conidia/ml impregnated with azadirachtin (1.53ppm) and indoxacarb (0.72ppm) tested against third instar larvae resulted 13.79-89.66 (LC50: 2.79 x 103, LC90: 3.12 x 108 conidia/ml) and 14.29-92.86 (LC50: 3.06 x 105, LC90: 1.11 x 109 conidia/ml) per cent mortality, respectively. M. rileyi (107 conidia/ml) alone or conidial suspension mixed with azadirachtin (1.02 and 1.53ppm) and indoxacarb (0.72ppm) resulted non-significant effect on days to mortality of 2nd and 3rd instar larvae of H. armigera. Hence M. rileyi can be used as one of the component of IPM programme for eco-friendly management of H. armigera after field evaluation.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810151740
dc.keywordslarval instars of Helicoverpa armigera (Hubner), Metarhizium(=Nomuraea) rileyi (Farlow) Kepler, S.A. Rehner ,Kepler, S.Aen_US
dc.language.isoEnglishen_US
dc.pages60+Ien_US
dc.publisherUHF,NAUNIen_US
dc.subEntomologyen_US
dc.themelarval instars of Helicoverpa armigera (Hubner), Metarhizium(=Nomuraea) rileyi (Farlow) Kepler, S.A. Rehner ,Kepler, S.Aen_US
dc.these.typeM.Scen_US
dc.titleEVALUATION OF PHYTOSOCIOLOGICAL, NATURAL REGENERATION AND SITE CHARACTERISTICS OF Rhododendron campanulatum D. Don IN ALPINE REGION OF WESTERN HIMALAYASen_US
dc.typeThesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
PDF M.Sc. Thesis BHISHAM DEV (ENTOMOLOGY) 2020.pdf
Size:
918.21 KB
Format:
Adobe Portable Document Format
Description:
Entomology
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Theses