LIFE TABLE STUDIES OF Spodoptera litura (FABRICIUS) (LEPIDOPTERA: NOCTUIDAE) ON GROUNDNUT
| dc.contributor.advisor | PRAMOD KATTI | |
| dc.contributor.author | SUNIL, K. | |
| dc.date.accessioned | 2020-06-11T06:52:29Z | |
| dc.date.available | 2020-06-11T06:52:29Z | |
| dc.date.issued | 2018-07-30 | |
| dc.description.abstract | Life table studies of Spodoptera litura (Fabricius) on groundnut cv. TMV-2 was conducted under laboratory conditions at 26±1°C to study the different population growth statistics from two generations and also field life tables were conducted to know the different mortality factors. In the first generation, survival of different life stages was 3, 17 and 10 days, respectively. Females contributed highest birth (mx=346.12) on 39th day. The mean length of generation (Tc) was 38.86 days. The innate capacity (rm) and finite rate for increase in number (λ) was 0.1738 and 1.19 females/female/day, respectively. Stable age distribution of various stages viz., eggs, larvae, pupae and adult was 52.46, 45.71, 1.60 and 0.20 per cent, respectively. In the second generation, survival of different life stages was 3, 19 and 10 days, respectively. Females contributed highest birth (mx=338.13) on 41st day. The mean length of generation (Tc) was 40.86 days. The innate capacity (rm) and finite rate for increase in number (λ) was 0.1615 and 1.17 females/female/day, respectively. Stable age distribution of various stages viz., eggs, larvae, pupae and adult was 50.25, 48.14, 1.19 and 0.20 per cent, respectively. In field life-table studies total of 83.02 per cent mortality of S. litura was recorded. The highest mortality was in the larval stage (64.95%), followed by pupa (26.33%), egg (17.54%) and adult (10.30%). The survivorship curve indicated type III curve. The major mortality factor in the larva was tachinids, Sl NPV and braconids, but large proportion of the mortality was categorized as unknown factor. Total of 15 mortality factors were identified in S. litura. Larval parasitoids (Cotesia sp., Chelonus sp. and tachinids), virus (NPV), malformed pupa, adult malformation and unknown causes contributed to mortality factors. | en_US |
| dc.identifier.citation | 200 | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810147464 | |
| dc.language.iso | en | en_US |
| dc.pages | 105 | en_US |
| dc.publisher | UNIVERSITY OF AGRICULTURAL SCIENCES, RAICHUR | en_US |
| dc.research.problem | LIFE TABLE STUDIES OF Spodoptera litura (FABRICIUS) (LEPIDOPTERA: NOCTUIDAE) ON GROUNDNUT | en_US |
| dc.sub | Agricultural Entomology | en_US |
| dc.theme | LIFE TABLE STUDIES OF Spodoptera litura (FABRICIUS) (LEPIDOPTERA: NOCTUIDAE) ON GROUNDNUT | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | LIFE TABLE STUDIES OF Spodoptera litura (FABRICIUS) (LEPIDOPTERA: NOCTUIDAE) ON GROUNDNUT | en_US |
| dc.type | Thesis | en_US |