Integrated management of rice root-knot nematode, Meloidogyne graminicola in transplanted rice
| dc.contributor.advisor | Verma, K.K. | |
| dc.contributor.author | Vinod Kumar | |
| dc.date.accessioned | 2019-08-07T06:32:54Z | |
| dc.date.available | 2019-08-07T06:32:54Z | |
| dc.date.issued | 2019 | |
| dc.description.abstract | Studies were carried out on integrated management of rice root-knot nematode, Meloidogyne graminicola in transplanted rice involving three pronged strategies i.e. laboratory, screen house and farmer‟s field conditions. Under laboratory conditions, all the substances (rhizobacteria, aqueous extract of phytotherapeutic substances and chemicals) inhibited larval hatch and mortality of M. graminicola at all dilutions i.e. 1:5, 1:10, 1:20, 1:40 and 1:80 and at each interval of exposure period i.e. 1, 2, 4, 6 and 8 days. Maximum and significantly higher hatching inhibition and larval mortality was found, where eggs and larvae of M. graminicola were exposed to the chemicals i.e. carbosulfan followed by cartap hydrochloride. Among the rhizobacterial strains and plant extracts, the maximum hatching inhibition and larval mortality was observed in Azotobactor chroococcum (HT-54) which is statistically at par with aqueous extracts of Azadirachta indica. However, A. chroococcum HT 54, A. indica and carbosulfan gave maximum inhibition of egg hatch and mortalty at 1:5 and 1:10 dilutions irrespective of period of exposure. Under nursery conditions, neem cake @ 50g/pot+P. fluorescens @ 50 g/pot treatments had significantly highest seedling growth of rice as compared to untreated check. It was found that integration of neem cake @ 50g/pot with P. fluorescens @ 50 g/pot (nursery) significantly reduced the nematode reproduction and multiplication. Upon transplanting of treated nursery into already treated soil under screen house conditions, it was found that integration of treated nursery (neem cake @ 50g/pot+P. fluorescens @ 50 g/pot) with neem cake @ 25g/pot+P. fluorescens @ 25 g/pot) had significantly highest plant growth parameters and minimum nematode reproduction and multiplication under screen house conditions. Similarly, reproduction factor was found minimum in treated nursery (neem cake @ 50g/pot+P. fluorescens @ 50 g/pot) with neem cake @ 25g/pot+P. fluorescens @ 25 g/pot. In main field experiment, where treated nursery treatments were integrated with main field treatments, significantly highest and maximum yield was obtained in combination of treated nursery (neem cake @ 50g/pot+P. fluorescens @ 50 g/pot) with deep summer ploughing. It was observed that combination of treated nursery (neem cake @ 50g/pot+P. fluorescens @ 50 g/pot) with+deep summer ploughing significantly reduced the nematode reproduction and multiplication. Similarly, it was observed that highest rice grain yield was recorded when treated seedlings were transplanted in combination of deep summer ploughing. Such studies will lead us to a scenario where management of M. graminicola would be possible by integration of ecofriendly, economic and effective components starting from laboratory to nursery and to the end point of rice cultivation in the main field. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810119817 | |
| dc.keywords | Rice, integrated management, Meloidogyne graminicola, neem cake, Pseudomonas fluorescens,Trichoderma viride, A. chroococcum HT 54,deep summer ploughing | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | CCSHAU | en_US |
| dc.sub | Nematology | en_US |
| dc.subject | null | en_US |
| dc.theme | Integrated management of rice root-knot nematode, Meloidogyne graminicola in transplanted rice | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | Integrated management of rice root-knot nematode, Meloidogyne graminicola in transplanted rice | en_US |
| dc.type | Thesis | en_US |