Pathogenicity of root knot nematode (Meloidogyne enterolobii Yang & Eisenback) in tomato (Lycopersicon esculentum Mill.) and its management through botanicals
| dc.contributor.advisor | Satya Kumar | |
| dc.contributor.author | Rawat, Neha Surendra Singh | |
| dc.date.accessioned | 2019-01-19T05:21:10Z | |
| dc.date.available | 2019-01-19T05:21:10Z | |
| dc.date.issued | 2018-08 | |
| dc.description.abstract | The Tomato (Lycopersicon esculentum Mill.), belongs to the family Solanaceae. It is one of the important crop widely cultivated throughout Asia for its edible fruits which are known to be rich in nutrients. Several biotic and abiotic factors have been reported to be associated with low production of tomato. Among the phytoparasitic nematodes, root knot nematode (Meloidogyne spp) is one of the important plant parasitic nematode known to be important limiting factor in the production and productivity of tomato. Root knot nematode attack tomato plant worldwide and reduce the yield of the crop. Periodic surveys were conducted in Mango and Guava orchard in Horticulture Research Centre, G.B.P.U.A.T, Pantnagar, Meloidogyne spp. were found to be the most prevalent in soil Meloidogyne spp. was the most prevalent nematode with 1.21-39.96% and population density ranged between 89-9289 nematodes per 200cc soil. On the other hand, Criconemoides spp, Hoplolaimus spp, Xiphinema spp and Trichodorus spp exhibited low population densities in soil.Among free living nematodes Dorylaimus spp were quite common in all soil samples with 3.06-27.35 per cent and population density range between 311-1689 nematodes per 200cc soil. These observations demonstrated that different genera of plant parasitic and free living nematodes are wide spread in Mango and Guava orchard in Horticulture Research Centre, G.B.P.U.A.T, Pantnagar. Results on pathogenicity experiment conducted in pot showed that an inoculums level of 500 J2 per kg soil and above significantly reduced the various plant growth parameters (shoot length, root length, fresh shoot weight, fresh root weight, dry shoot weight, dry root weight, number of gall formation and final population of nematodes) over uninoculated control and the maximum reduction was obtained at the inoculums level of 8000 larvae of nematode per kg soil. Increase in the inoculum levels i.e. 100, 250, 500, 1000, 2000, 4000, and 8000 larvae of nematode per kg soil decrease the growth parameter of tomato, respectively. Experiment on egg hatching and mobility of M. enterolobii indicate that Azadirachta indica leaf extract is the most effective and Eucalyptus globulus leaf extract is least among used botanicals. Azadirachta indica leaf extract @ 2.5 per cent concentration at the end of 72 hours exposure was most effective. Egg hatching of the M. enterolobii was directly proportionate to exposure period and inversely proportionate to the concentration of botanical extracts. Whereas, the immobility of the M. enterolobii was directly proportionate to exposure period and concentration of botanical extracts as it increases with increase in concentration. The study on management of M. enterolobii infecting tomato by botanicals indicated that all treatments increased the plant growth over untreated inoculated control, while Azadirachta indica leaf @ 5g per kg soil was the best in increasing the overall plant growth as well as in reducing the galling of M. enterolobii. This was followed by Tagetes erecta, Jatropha curcas, Lantana camara, Calotropis procera, and Eucalyptus globulus. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810091544 | |
| dc.keywords | pathogenicity, Meloidogyne enterolobii, tomatoes, Lycopersicon esculentum, pest management, biological control | en_US |
| dc.language.iso | en | en_US |
| dc.pages | 97 | en_US |
| dc.publisher | G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand) | en_US |
| dc.research.problem | Tomatoes | en_US |
| dc.sub | Plant Pathology | en_US |
| dc.subject | null | en_US |
| dc.theme | Nematoda | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | Pathogenicity of root knot nematode (Meloidogyne enterolobii Yang & Eisenback) in tomato (Lycopersicon esculentum Mill.) and its management through botanicals | en_US |
| dc.type | Thesis | en_US |