RENIFORM NEMATODE, ROTYLENCHULUS RENIFORMIS LINFORD AND OLIVEIRA. 1940, IN PIGEONPEA

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dc.contributor.advisorPATEL, D. J.
dc.contributor.authorPATEL, RAVINDRA GOVINDBHAI
dc.date.accessioned2018-06-13T09:22:40Z
dc.date.available2018-06-13T09:22:40Z
dc.date.issued1989
dc.description.abstractThe experiments on reniform nematode (Rotylenchulus reniformis) affecting pigeonpea were conducted to study 1, Pathogenicity of reniform nematode on pigeonpea to determine threshold level, ii. Biochemical changes brought out by the nematode infection in crop, iii, Histopathological studies to know host-parasite relationship, iv. Varietal screening for locating source(s) of resistance to the nematode and V, Management of nematode through organic amendments and nematicides using pigeonpea variety T-15-15 during 1988-89. Results obtained indicated that : i. An inoculum level of 1,000 nematodes/plant and above was detrimental to the growth and development of pigeonpea cv. T-15-15. Root, soil and total nematode population/plant an significantly increased with increase in an inoculum levels. The nematode reproduction rate decreased with increase in inoculum levels and it was maximum (48.71) in 10 nematodes/ plant and minimum (2.79) in 10,000 nematodes/plant. ii. Roots inoculated with reniform nematodes (10,000 nematodes/plant) significantly decreased polyphenol oxidase and β -glucosidase activities as well as total phenol contents whereas peroxidase activity did not get altered due to nematode infection. iii, Histopathological studies revealed that young female penetrated the epidermal and cortical parenchyma tissues and reached the endodermal layers intracellularly through parenchyma. The one third anterior portion of the female remained embedded in the root. Several cells of pericycle layer surrounding feeding of nematode head formed giant cells. iv. Out of 30 different pigeonpea varieties screened against R. reniformis, none was either immune or resistant or moderately resistant to the nematode. Eighteen and twelve lines had susceptible and highly susceptible reactions respectively. V. Various organic amendments viz., piludi cake, mustard cake, karanj cake, castor cake, mahuva cake as well as pressmud, poultry and farm yard manure and normal fertilization through urea improved plant growth and reduced nematode population as compared to control in pots. Poultry manure proved to be the best from plant growth characters and nematode control view points. The next best organic amendment was pressmud. vi. All eight granular nematicides viz., ethoprophos, sebufos, phorate, HOE 388, benfurocarb, cartap, neemark and carbofuran tried with two doses at 1 and 2 kg/ha enhanced the plant growth and reduced the nematode population as compared to control. Among these, carbofuran and HOE 388 each @ 2 kg/ha and benfurocarb @ 1 kg/ha significantly improved the plant growth characters viz., plant height, fresh shoot and root weights and effectively managed R. reniformis on pigeonpea cv. T-15-15 in pots.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810052552
dc.keywordsRENIFORM NEMATODE, ROTYLENCHULUS RENIFORMIS LINFORD, OLIVEIRA. 1940, IN PIGEONPEAen_US
dc.language.isoenen_US
dc.publisherAAU, Ananden_US
dc.research.problemRENIFORM NEMATODE, ROTYLENCHULUS RENIFORMIS LINFORD AND OLIVEIRA. 1940, IN PIGEONPEAen_US
dc.subNematologyen_US
dc.subjectNEMATOLOGY, AGRICULTUREen_US
dc.subjectA STUDYen_US
dc.themeRENIFORM NEMATODE, ROTYLENCHULUS RENIFORMIS LINFORD AND OLIVEIRA. 1940, IN PIGEONPEAen_US
dc.these.typeM.Scen_US
dc.titleRENIFORM NEMATODE, ROTYLENCHULUS RENIFORMIS LINFORD AND OLIVEIRA. 1940, IN PIGEONPEAen_US
dc.typeThesisen_US
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