Studies on varietal screening and eco-friendly management of Lipaphis erysimi (Kalt.) on mustard
| dc.contributor.advisor | Tiwari, Ruchira | |
| dc.contributor.author | Yadav, Anju | |
| dc.date.accessioned | 2021-01-23T09:09:33Z | |
| dc.date.available | 2021-01-23T09:09:33Z | |
| dc.date.issued | 2020-10 | |
| dc.description.abstract | The studies were conducted on varietal screening of mustard and eco-friendly management of mustard aphid, Lipaphis erysimi (Kalt.) on mustard crop at G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand during rabi crop seasons 2018-19 and 2019-20. Twenty two mustard varieties were tested for resistance against aphids on basis of average aphid population harboured by each variety during both rabi crop seasons. The mustard varieties i.e. Crembe , B. napus and Eurica sativa were found Resistant with mean aphids/5plants (18.31), (42.54), and (49.21) whereas MCB-1-1-6-3, MCB-1-2-3-7 and Kiran with mean aphids/5plants (68.62), (74.56) and (80.38) were identified as the moderately resistant varieties .Whereas, mustard varieties, Uttara, Varuna, PPS-1 were found as susceptible varieties with mean aphid population/5plants (108.99), (122.87) and (147.73. However majority of varieties viz. Pitambari, Pant Sweta, Kranti, NHCHB-101, PR-19, YSH-401, NRCYS-501, PT-508, PT-303, Giriraj, B.rapa, PM-25 and PHT-1, were found to be Highly susceptible with mean population of aphids/5plants ranged from (151.68 to 244.74). Among the eco-friendly natural formulations used against mustard aphids percent reduction in aphid population after 15 days of second spray was found significantly highest in Agniastra (75.94%) which was at par with Neemastra (72.58%) followed by Dushparni (66.97%), Desi cow urine @10% (64.40%), Panchgavya ( 63.81%), Jivamrit ( 46.47%) and Desi cow urine @5% (41.53%) treated mustard crop. These eco-friendly natural formulations were also found safe for natural enemies and pollinator, honey bees in comparison to chemical given significantly highest grain yield ranged from 855 kg to 1150 kg/ha. in comparison to untreated control (783.33 kg/ha.). The studies conducted under laboratory bioassays were also showed efficacy of eco-friendly natural formulations to reduce the fecundity of gravid females and to increase female mortality after 72h of treatment. Neemastra showed no attractancy for aphids with the least orientation towards the leaf discs treated with Agniastra (0.33) followed by Dashparni, and Panchgavya (1.00 each) with the highest mean aphid attractancy towards untreated control (13.67) after 48h of exposure in choice test. The mortality of gravid females was found maximum ranged from (76.67% to 96.67%) at the highest concentration@5% of natural formulations with less female fecundity in Agniastra (1.00), Dashparni (2.00) with no fecundity recorded in Panchgavya treated mustard leaves with maximum female fecundity (7.00) was observed in untreated mustard leaves after 24h of exposure. At the highest concentration @5.0% of natural formulations, percent nymphal mortality was recorded on mustard leaves treated with Dasparni, Jivamrit, Panchgavya and 96.67% mortality was recorded in Neemastra and Agniastra followed by Desi cow urine ( 80.00%) with the least (6.67%) nymphal mortality was recorded in untreated control. The biochemical parameters of mustard seeds were correlated with aphid population and it clearly showed the negative correlation of glucosinolates with aphid population. Thus, the present study clearly revealed that the resistant mustard varieties as well as eco-friendly natural formulations can easily be incorporated in any IPM programme for mustard crop but further in depth studies are essentially required to explore the efficacy of these eco-friendly, cost effective, easily available natural formulations against mustard aphid for its better management. | en_US |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810160531 | |
| dc.keywords | screening, ecosystems, Lipaphis erysimi, mustard | en_US |
| dc.language.iso | English | en_US |
| dc.pages | 191 | en_US |
| dc.publisher | G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand) | en_US |
| dc.research.problem | Mustard | en_US |
| dc.sub | Entomology | en_US |
| dc.theme | Insect Pests | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | Studies on varietal screening and eco-friendly management of Lipaphis erysimi (Kalt.) on mustard | en_US |
| dc.type | Thesis | en_US |