Effect of intercropping on Helicoverpa armigera (Hubner) and its larval parasitoid in chickpea crop
| dc.contributor.advisor | Ram Ujagir | |
| dc.contributor.author | Pandey, Renu | |
| dc.date.accessioned | 2019-11-22T09:16:18Z | |
| dc.date.available | 2019-11-22T09:16:18Z | |
| dc.date.issued | 2005-06 | |
| dc.description.abstract | The field experiments were carried out at Crop Research Centre of G.B. Pant University of Agriculture and Technology Pantnagar, Distt. U.S.Nagar, Uttranchal, India, during rabi season of 2003-04 and 2004-05 to find out the effect of intercropping on the incidence of Helicoverpa armigera (Hubner) infesting chickpea and its natural enemy Campoletis chloridae. In general, all the intercrops viz. barley,linseed and coriander were found to be effective in reducing the egg count and larval population. Overall, mean number of egg count varied from minimum of 17/m2 in chickpea + coriander (2:1) and chickpea + barley (4:2) to the maximum of 37.7/m2 in chickpea sole crop. The reducing effect of intercropping on egg count is more pronounced when coriander was put as intercrop with chickpea in 2:1 ratio. Minimum number of mean number of larval count was obtained in chickpea + coriander (2:1) to maximum of 81.9 in chickpea sole crop. This has suggested that both egg and larval count of H. armigera can significantly be reduced if chickpea is intercropped with coriander in 2:1 rows. The highest pod damage caused by H. armigera was recorded in chickpea sole crop, which was significantly suppressed with introduction of intercrops. Maximum larval parasitization of 39.9 % was obtained with chickpea+ coriander (2:1) and minimum of 17.5% in chickpea + barley (6:1) and chickpea sole crop (19.6). Mean equivalent grain yield in intercropping combinations ranged from maximum of 886.8 Kg/ha in chickpea+ coriander (4:2) to the minimum of 188.9 Kg/ha in chickpea sole crop. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810135989 | |
| dc.keywords | intercropping, Helicoverpa armigera, larvae, parasitoids, chickpeas | en_US |
| dc.language.iso | en | en_US |
| dc.pages | 94 | en_US |
| dc.publisher | G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand) | en_US |
| dc.research.problem | Chickpeas | en_US |
| dc.sub | Entomology | en_US |
| dc.subject | null | en_US |
| dc.theme | Insect Pests | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | Effect of intercropping on Helicoverpa armigera (Hubner) and its larval parasitoid in chickpea crop | en_US |
| dc.type | Thesis | en_US |