Studies on induced biochemical changes and management of root knot nematode (Meloidogyne graminicola) in rice crop

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dc.contributor.advisorDr. Kamal Khilari
dc.contributor.authorABHISHEK KUMAR
dc.date.accessioned2023-12-27T14:14:49Z
dc.date.available2023-12-27T14:14:49Z
dc.date.issued2020-12
dc.description.abstractDEPARTMENT OF PLANT PATHOLOGY SARDAR VALLABHBHAI PATEL UNIVERSITY OF AGRICULTURE & TECHNOLOGY, MEERUT - 250110 (U. P.), INDIA Thesis Title: “Studies on induced biochemical changes and management of root knot nematode (Meloidogyne graminicola) in rice crop” ABSTRACT Root knot nematode (Meloidogyne graminicola) has been reported as a serious pest of paddy, especially in light soil and irrigated upland condition. It causes damage to nurseries and main field. The main characteristic symptoms produced by M. graminicola are terminal hook shaped or spiral galls on the roots and above ground includes patches of stunted and yellowish plants in field. Survey was conducted during 2019 in different blocks of Meerut district to find out the disease incidence and infestation of root-knot nematode in rice field at nursery stage. Maximum 70.83 % prevalence and 58.33% incidence of root knot nematode was observed in Daurla block followed by 66.66% prevalence in Meerut. Minimum 5.26 % prevalence and 2.10% incidence of root knot nematode disease was recorded in Kharkhoda block. Twenty basmati rice varieties were screened against rice root knot nematode under pot condition. Out of twenty basmati varieties, four varieties viz; Pusa basmati 1121, Vallabh basmati -22, Pusa basmati-1509, Vallabh basmati-23 showed susceptible reaction and rest sixteen varieties shown moderately susceptible reaction against rice root-knot nematode. For management of rice root knot nematode, use of chemicals is becoming more expensive and undesirable due to environmental hazards. Use of bio control agents coupled with organic amendments is an eco-friendly, sustainable and economically feasible method of pest and disease management. Hence in present study, experiments were conducted to test the efficacy of different bio-control agents against root knot nematode. in this regard induction of systemic resistance against root knot nematode in rice plant after application of bioagents was also studied. Result revealed that higher accumulation of total phenol (2.36 μg catechol mg-1 protein), peroxidase (6.23), polyphenyloxidase (PPO) (3.48) change in absorbance min-1 mg-1 protein and phenylalanine ammonia lyase (PAL) 33.43 nmol transcinnamic acid m-1 mg-1 protein was recorded in induction of Trichoderma isolate S13 @ 5 g /kg of soil at 21th days after inoculation of M.graminicola. Through In vitro study the efficacy culture filtrate of selected bio-agents was tested on larval mortality and egg hatching of M. graminicola. Among all the bioagents, Trichoderma isolate S-13 was found more effective with 90.00% larval mortality and 48.33% egg hatching at 50 % concentration at 72 hours after inoculation. Whereas in control larval mortality 1.67% and egg hatching 88.33% was recorded at 72 hours. Pot experiments were conducted to study the efficacy of selected bio-agents on management of root knot nematode and plant growth parameter of rice plant. On the basis of two years observations, minimum (7.89 and 6.00) galls/plant and maximum (71.78 cm, 65.00 cm) shoot length were recorded at 60 DAS in case of Trichoderma isolates S7 when applied @ 5g/kg of soil. Field experiments were conducted during 2019 and 2020 to see the efficacy of bioagents in the management of root knot nematode. Minimum (17.89 and 26.56) galls /plants, maximum shoot length (99.00 cm & 134.33cm) and maximum yield (16.33 and 21.87 q/ha) were recorded in case of soil application of FYM @ 1kg/m2+Trichoderma isolates S13 @ 10g/m2 in years 2019 and 2020, respectively at 60 days after transplanting. On the basis of present study, it has been observed that Trichoderma isolate S13 is performing well in the management of rice root knot nematode. It may be a better component of integrated management program for rice root knot nematode management. Name: Abhishek Kumar I.D. No.: 2995 Batch: 2017-18 Degree: Ph. D. Department: Plant Pathology Advisor: Dr. Kamal Khilari Kamal Khilari (Advisor) Abhishek Kumar (Author)
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810204633
dc.language.isoEnglish
dc.pages189
dc.publisherSARDAR VALLABHBHAI PATEL UNIVERSITY OF AGRICULTURE AND TECHNOLOGY, MEERUT- 250110 (U.P.),
dc.subPlant Pathology
dc.theme“Studies on induced biochemical changes and management of root knot nematode (Meloidogyne graminicola) in rice crop”
dc.these.typePh.D
dc.titleStudies on induced biochemical changes and management of root knot nematode (Meloidogyne graminicola) in rice crop
dc.typeThesis
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