REVALIDATION OF RECOMMENDED DOSES OF Helicoverpa NPV AGAINST TOMATO FRUIT BORER HELICOVERPA ARMIGERA (HUBNER) (LEPIDOPTERA: NOCTUIDAE) ON TOMATO
| dc.contributor.advisor | CHAKRAVARTHY, A K | |
| dc.contributor.author | BYASIGIDERI, DODDABASAPPA | |
| dc.date.accessioned | 2017-02-06T03:36:07Z | |
| dc.date.available | 2017-02-06T03:36:07Z | |
| dc.date.issued | 2009-02-10 | |
| dc.description.abstract | Investigations on the revalidation of recommended doses of Helicoverpa NPV against tomato fruit borer Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) on Tomato were undertaken in and around Bangalore rural district during 2008-09. Different sources of HaNPV viz., Project Directorate of Biological Control (PDBC), Bangalore, Multiplex Pvt. Ltd., MARGO Pvt. Ltd., Bio-Pest Management (BPM), University of Agricultural Sciences, Dharwad (UASD) and Bio-Control Research Laboratory (BCRL) were evaluated. The results revealed that HaNPV from BCRL proved the best, i.e., free from debris and contamination, recorded the highest POBs/ml (1.5X109 POBs/ml) and particle size in HaNPV sample was larger sample from Multiplex Pvt. Ltd (1.4X109 POBs/ml) was the next best. The Virulence of HaNPV from BCRL gave best results at 5X104 POBs/ml with LT50 in 4.58 days compared to Multiplex (5.01days). Of the 3rd ,4th,5th and 6th instar Helicoverpa larvae, the optimum LT50 value obtained for 3rd instar larvae was 4.75 days at 1X1011 POBs/ac. Thus, 2 to 3 applications of HaNPV at 1X1011 POBs/ac conferred multiple advantages, cost of HaNPV at 1X1011 POBs/ac works much cheaper than other treatments. In large plots, mean number of surviving Helicoverpa larvae and mean % fruit infestation were less and yield from Farmer Practice Plot (FPP) was 33.8 t/ha compared to 38.3 t/ha from HaNPV sprayed Plot (HNP); B: C ratio was 2.58 in HNP compared to 2.28 in FPP. HaNPV is environmental friendly and cheaper and it is advisable to recommend HaNPV over insecticides. | en_US |
| dc.identifier.other | TH-9327 | |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810000194 | |
| dc.language.iso | en | en_US |
| dc.publisher | University of Agricultural Sciences GKVK, Bangalore | en_US |
| dc.sub | Agricultural Entomology | en_US |
| dc.subject | null | en_US |
| dc.theme | TH-9327 | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | REVALIDATION OF RECOMMENDED DOSES OF Helicoverpa NPV AGAINST TOMATO FRUIT BORER HELICOVERPA ARMIGERA (HUBNER) (LEPIDOPTERA: NOCTUIDAE) ON TOMATO | en_US |
| dc.type | Thesis | en_US |