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Co-Authors
- G. C. Rana
- Arvind Kumar
- Vandna Sharma
- Chhattar Pal
- Vineeta Singh
- Manoj Kumar
- Vinay Kumar Singh
- Chowdappa Pallem
- Vinod Kumar Mishra
- U. S. Rawat
- A. D. Pawar
- R. Singh
- Rakesh Kumar
- S. K. Kango
- Vikram Singh
- S. K. Srivastava
- Jaspal Singh
- Amrit Pal Kaur
- Rajni Jain
- I. Kingsly
- S. S. Raju
- S. M. Yadav
- Major Singh
- Laxman Prasad Balai
Journals
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Chand, Ramesh
- Thermal Instability in a Layer of Nanofluid Subjected to Rotation and Suspended Particles
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Authors
Affiliations
1 Department of Mathematics, Government College Dhaliara (Kangra), Himachal Pradesh, IN
2 Department of Mathematics, Sidharth Government College Nadaun (Hamirpur), Himachal Pradesh, IN
3 Department of Mathematics, Government College Nagrota Bagwan (Kangra), Himachal Pradesh, IN
4 Department of Mathematics, DDM College of Science and Technology Banehra (Una), Himachal Pradesh, IN
1 Department of Mathematics, Government College Dhaliara (Kangra), Himachal Pradesh, IN
2 Department of Mathematics, Sidharth Government College Nadaun (Hamirpur), Himachal Pradesh, IN
3 Department of Mathematics, Government College Nagrota Bagwan (Kangra), Himachal Pradesh, IN
4 Department of Mathematics, DDM College of Science and Technology Banehra (Una), Himachal Pradesh, IN
Source
Research Journal of Science and Technology, Vol 5, No 1 (2013), Pagination: 32-40Abstract
The objective of the present work is to investigate theoretically the combined effect of rotation and suspended particles on the thermal instability in a layer of nanofluid. A linear stability theory, perturbation method and normal mode technique is used to find the solution of fluid layer confined between two free boundaries. For linear theory analysis, critical Rayleigh number has been obtained to study the stability analysis. The model used for the nanofluid incorporates the effects of Brownian motion and thermophoresis. The onset criterion for stationary and oscillatory convection is derived analytically and graphically. The effects of various parameters such as suspended particles, rotation, Lewis number and modified diffusivity ratio on the stationary convection are studied.Keywords
Prandtl Number, Taylor Number, Nanofluid, Suspended Particles, Lewis Number.References
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- Chand R.: Effect of suspended particles on thermal instability of Maxwell visco-elastic fluid with variable gravity in porous medium, Antarctica J. Math., 8(6), 487-497, (2011).
- Chand, R. and Rana, G. C.: Oscillating Convection of Nanofluid in Porous Medium, Transp Porous Med, 95, 269-284, (2012a).
- Chand R. and Rana G. C.: On the onset of thermal convection in rotating nanofluid layer saturating a Darcy-Brinkman porous medium, Int. J. of Heat and Mass Transfer, 55, 5417- 5424, (2012b).
- Chand R. and Rana G. C.: Thermal Instability of Rivlin- Ericksen Elastico-Viscous Nanofluid Saturated by a Porous Medium, J. Fluids Eng., 134(12), 121203, (2012c).
- Chandrasekhar S : Hydrodynamic a n d H y d r o Magnetic Stability, Oxford University Press (Dover Publication, New York (1961).
- Choi, S.: Enhancing Thermal Conductivity of Fluids with Nanoparticles in: D. A. Siginer and H.P.Wang (Eds), Developments and Applications of Non-Newtonian Flows, ASME FED, Vol. 231/MD-Vol. 66, 99-105, (1995).
- Kim J., Kang Y. T. and Choi C. K.: Analysis of convective instability and heat transfer characteristics of nanofluids, Physics of Fluid, 16 (7), 2395-2401, (2011).
- Kuznetsov, A. V., Nield, D. A.: Effect of local Thermal Nonequilibrium on the onset of Convection in a Porous Medium Layer Saturated by a nanofluid, Transport in Porous Media 83, 425-436, (2010a).
- Kuznetsov, A. V., Nield, D. A.: Thermal instability in a porous medium layer saturated by a nanofluid: Brinkman Model, Transp. Porous Medium, 81(3), 409-422, (2010b).
- Kuznetsov, A. V., Nield, D. A.: The Onset of Double-Diffusive Nanofluid Convection in a Layer of a Saturated Porous Medium, Transport in Porous Media, 85, 3, 941-951, (2010c).
- Nield, D.A., Kuznetsov, A. V.: Thermal instability in a porous medium layer saturated by a nanofluid, Int. J. Heat Mass Transf. 52, 5796–5801, (2009).
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- Nield D. A., Kuznetsov A. V.: The effect of local thermal nonequilibrium on the onset of convection in a nanofluid, J. Heat Transfer, 132(5), 052405–052411, (2010b).
- Nield D. A., Kuznetsov A. V.: The onset of convection in a layer of cellular porous material: Effect of temperature-dependent conductivity arising from radiative transfer, J. Heat Transfer, 132, 7, 074503,(2010c).
- Nield D. A., Kuznetsov A. V.: The onset of double-diffusive convection in a nanofluid layer, Int. J. of Heat and Fluid Flow, 32(4), 771–776, (2011a).
- Nield D. A., Kuznetsov A. V: The Effect of Vertical Through flow on Thermal Instability in a Porous Medium Layer Saturated by a Nanofluid, Transport in Porous Media 87, 765–775, (2011b).
- Rana, G. C. and Thakur, R. C.: Effect of suspended particles on thermal convection in Rivlin-Ericksen elastico-viscous fluid in a Brinkman porous medium, Journal of Mechanical Engineering & Sciences, 2, 162–171, (2012).
- Rana, G. C., Thakur, R.C. and Kumar, K.: Thermosolutal convection in compressible Walters’ (model B) fluid permeated with suspended particles in a Brinkman porous medium, Journal of Computational Multiphase Flows, 4(2), 211–224, (2012).
- Sheu, L.J.: Thermal instability in a porous medium layer saturated with a Visco-elastic nano fluid, Transp Porous Med, 88, 461– 477, (2011a).
- Sheu, L.J.: Linear stability of convection in a visco elastic nanofluid layer, World Sci. Eng.Technol. 58, 289–295 (2011b).
- Scanlon, J. W. and Segel, L. A.: Effect of suspended particles on onset of Bénard convection, Physics Fluids, 16, 1573–78, (1973).
- Srivastava, K.M.: effect of suspended particles on the thermal convection instability in hydromagnetics, Astrophysics and Space Science 61, 143–151, (1979).
- Tzou D.Y.: Thermal instability of nanofluids in natural convection, International Journal of Heat and Mass Transfer, 51, 2967–2979, (2008a).
- Tzou D Y.: Instability of nanofluids in natural convection, ASME Journal of He a t Transfer, 30, 372-401, (2008b).
- Tzeng, S.C. Lin, C.W. and Huang, K. D.: Heat transfer enhancement of nanofluids in blade coupling of four wheel drive vechicles, Acta Mechanica, 179, 1(2), 11–23, (2005).
- Vadasz, P: Heat conduction in nanofluid suspensions. ASME J. Heat Transf. 128, 465–477, (2006).
- Xuan Y., Li Q. : Investigation of Convective Heat Transfer and Flow Features of Nanofluids, ASME Journal of Heat Transfer, 125, pp. 151–155, (2003).
- Yadav D, Agrawal, G.S. and Bhargava, R.: Thermal instability of rotating nanofluid layer, International Journal of Engineering Science 49, 1171–1184, (2011).
- Thermal Instability of Rotating Maxwell Visco-Elastic Fluid with Variable Gravity in Porous Medium
Abstract Views :165 |
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Authors
Affiliations
1 Department of Mathematics, Govt. P. G. College, Dhaliara-177 103, Himachal Pradesh, IN
1 Department of Mathematics, Govt. P. G. College, Dhaliara-177 103, Himachal Pradesh, IN
Source
The Journal of the Indian Mathematical Society, Vol 80, No 1-2 (2013), Pagination: 23-31Abstract
The effect of variable gravity and rotation on the Thermal instability of Maxwell visco-elastic fluid in porous medium is investigated. It is found that, in case of stationary convection, variable gravity has destabilizing effect while rotation has stabilizing effect on the system whereas medium permeability has stabilizing/destabilizing effect depending upon certain condition. The mode may be non oscillatory or oscillatory.Keywords
Thermal Instability, Maxwell Visco-elsatic Fluid, Porous Medium, Variable Gravity, Rotation.- Draft Genome Sequence of Cercospora canescens: A Leaf Spot Causing Pathogen
Abstract Views :263 |
PDF Views:102
Authors
Ramesh Chand
1,
Chhattar Pal
1,
Vineeta Singh
1,
Manoj Kumar
1,
Vinay Kumar Singh
2,
Chowdappa Pallem
3
Affiliations
1 Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221 005, IN
2 Centre for Bioinformatics, School of Biotechnology, Banaras Hindu University, Varanasi 221 005, IN
3 ICAR-Central Plantation Crops Research Institute, Kudlu, P.O. Kasargod 671 124, IN
1 Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221 005, IN
2 Centre for Bioinformatics, School of Biotechnology, Banaras Hindu University, Varanasi 221 005, IN
3 ICAR-Central Plantation Crops Research Institute, Kudlu, P.O. Kasargod 671 124, IN
Source
Current Science, Vol 109, No 11 (2015), Pagination: 2103-2110Abstract
Cercospora canescens (Ellis and Martin) is a hemibiotrophic pathogen causing leaf spot disease on mungbean (Vigna radiata L). Genome sequence (∼33.97 Mb) assembled in 8239 contigs with 10627 protein coding genes. A total of 2842 proteins were identified as homologous of 223 predicted and 7562 putative uncharacterized involved in biological processes, molecular functions. The identified proteins are mainly involved in infection process used to compromise nutrients or destroy host tissues gycosidases, transposases, cytochrome P450s, genes codes to signal transduction, cell wall breakdown, transporters, host stomata perception, adhesion, polyketide synthase and cercosporin. A total of 528 simple sequence repeats were also identified from the genome sequence assembly of C. canescens. This study provides insights into pathogenic mechanism and a better understanding of virulence differentiation of C. canescens. It will also help in identification of similarity and differences in regions among the genomes of different species of Cercospora.Keywords
Cercospora canescens, Functional Annotation, Gene Prediction, Sequencing and Assembly, Vigna radiata.References
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- Madan Mohan Malaviya's Vision on Agriculture Education and Research
Abstract Views :255 |
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Authors
Affiliations
1 Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221 005, IN
1 Institute of Agricultural Sciences, Banaras Hindu University, Varanasi 221 005, IN
Source
Current Science, Vol 108, No 6 (2015), Pagination: 1029-1030Abstract
No Abstract.- Natural Parasitism of Pomegranate Butterfly, Deudorix epijarbas Moore in Mid-Hill Regions of Solan and Sirmaur, Himachal Pradesh
Abstract Views :151 |
PDF Views:129
Authors
Affiliations
1 Central Biological Control Station, Solan 173 212, IN
1 Central Biological Control Station, Solan 173 212, IN
Source
Journal of Biological Control, Vol 3, No 1 (1989), Pagination: 65-66Abstract
The pomegranate butterfly, Deudorix epijarbas Moore has in recent years gained much economic importance in the mid-hill· regions of Himachal Pradesh (Kakar et al., 1987; Prasad et al., 1987 and Thakur et al., 1988b). Sometimes, the damage is so severe that the whole fruit is ruined and it becomes unsuitable for consumption. Since chemical control of this pest is neither feasible nor economical (Kakar and Sharma, 1988), the present study was undertaken to find out the natural enemies of D. epijarbas and their natural parasitism in the mid-hill areas of Solan and Sirmaur districts in Himachal Pradesh, where pomegranate is grown as a wild form.Keywords
Natural Parasitisation, Deudorix epijarbas, Telenomus cyrus, Apanteles vitripennis, Biocontrol, Correlation.- On the Onset of Electrohydrodynamic Instability of Rivlin-Ericksen Viscoelastic Dielectric Fluid Layer
Abstract Views :189 |
PDF Views:1
Authors
Affiliations
1 Department of Mathematics, Sidharth Govt. College, Nadaun-177 005, Himachal Pradesh, IN
2 Department of Physics, Sidharth Govt. College, Nadaun-177 005, Himachal Pradesh, IN
3 Department of Mathematics, Govt. College Dharampur, District Mandi, Himachal Pradesh, IN
1 Department of Mathematics, Sidharth Govt. College, Nadaun-177 005, Himachal Pradesh, IN
2 Department of Physics, Sidharth Govt. College, Nadaun-177 005, Himachal Pradesh, IN
3 Department of Mathematics, Govt. College Dharampur, District Mandi, Himachal Pradesh, IN
Source
Research Journal of Engineering and Technology, Vol 6, No 1 (2015), Pagination: 13-18Abstract
In this paper we investigate the effect of AC electric field on the onset of instability of an elastico-viscous Rivlin-Ericksen dielectric fluid layer stimulated by the dielectrophoretic force due to the variation of dielectric constant with temperature. By applying linear stability theory and normal mode analysis method, we derive the dispersion relation describing the influence of viscelasticity and AC electric field. For the case of stationary convection, it is observed that Rivlin-Ericksen fluid behaves like an ordinary Newtonian fluid whereas AC electric field hastens the stationary convection. The present results are in good agreement with the earlier published results.Keywords
Walter’ (Model B') Fluid, AC Electric Field, Electrohydrodynamic, Viscosity, Viscoelasticity.- Megneto-Convection in a Layer of Maxwell Visco-Elastic Fluid in a Porous Medium with Soret Effect
Abstract Views :156 |
PDF Views:1
Authors
Affiliations
1 Department of Mathematics, Government College, Nurpur, HP, IN
2 Department of Mathematics, Government College Haripur (Manali), HP, IN
3 Department of Mathematics, Jawalaji Degree College Jawalamukhi, HP, IN
1 Department of Mathematics, Government College, Nurpur, HP, IN
2 Department of Mathematics, Government College Haripur (Manali), HP, IN
3 Department of Mathematics, Jawalaji Degree College Jawalamukhi, HP, IN
Source
Research Journal of Engineering and Technology, Vol 6, No 1 (2015), Pagination: 23-30Abstract
Double Diffusive convection in a horizontal layer of Maxwell visco-elastic fluid in a porous medium in the presence of constant vertical magnetic field and Soret coefficient is investigated. Flow in porous medium is characterized by Darcy model. The normal mode method is used to find linear stability analysis for the fluid layer confined between two free-free boundary surfaces. The stability criterions for stationary and oscillatory convection have been derived. Effects of various parameters on the stationary have been obtained analytically and graphically.Keywords
Maxwell Visco-Elastic Fluid, Chandrasekhar Number, Soret Parameter, Rayleigh-Darcy Number, Magnetic Prandtl Number.- Effect of Rotation on the Onset of Compressible Rivlin-Ericksen Fluid Heated from Below Saturating a Darcy-Brinkman Porous Medium
Abstract Views :158 |
PDF Views:0
Authors
G. C. Rana
1,
Ramesh Chand
2
Affiliations
1 Department of Mathematics, NSCBM Govt. P. G. College, Hamirpur-177 005, Himachal Pradesh, IN
2 Department of Mathematics, Govt. P. G. College, Dhaliara-177 103, Himachal Pradesh, IN
1 Department of Mathematics, NSCBM Govt. P. G. College, Hamirpur-177 005, Himachal Pradesh, IN
2 Department of Mathematics, Govt. P. G. College, Dhaliara-177 103, Himachal Pradesh, IN
Source
Research Journal of Engineering and Technology, Vol 3, No 2 (2012), Pagination: 76-81Abstract
The effect of rotation on the onset of convection in compressible Rivlin-Ericksen elastico-viscous fluid heated from below saturating a porous medium is considered. For the porous medium, the Brinkman model is employed. By applying normal mode analysis method, the dispersion relation has been derived and solved analytically. It is observed that the medium permeability, compressibility, gravity field and viscoelasticity introduce oscillatory modes. For stationary convection, the rotation has stabilizing effect whereas Darcy number and medium permeability have destabilizing/stabilizing effect on the system under certain conditions. The effects of rotation, Darcy number and medium permeability have also been shown graphically.Keywords
Rivlin-Ericksen Fluid, Thermal Convection, Viscoelasticity, Rotation, Brinkman-Porous Medium.- Effect of Rotation on Thermal Instability of Oldroydian Visco-Elastic Fluid Saturated by Brinkman Darcy Porous Medium
Abstract Views :161 |
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Authors
Affiliations
1 Department of Mathematics, Government P. G. College, Dhaliara-177103, Himachal Pradesh,, IN
1 Department of Mathematics, Government P. G. College, Dhaliara-177103, Himachal Pradesh,, IN
Source
Research Journal of Engineering and Technology, Vol 3, No 2 (2012), Pagination: 92-99Abstract
The effect of rotation on the thermal instability of Oldroydian visco-elastic fluid in porous medium is studied. The Brinkman-Darcy model has been used for porous medium. A linear stability analysis based upon normal mode analysis is used to find solution of the fluid layer confined between two free boundaries. The onset criterion for stationary and oscillatory convection is derived analytically and graphs have been plotted to study the effects of the Taylor number and Brinkman-Darcy number on the stationary convection.Keywords
Thermal Instability, Oldroydian Visco-Elastic Fluid, Brinkman-Darcy Number, Prandtl-Darcy Number, Rotation.- Triple-Diffusive Convection in a Layer of Viscoelastic Nanofluid
Abstract Views :222 |
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Authors
Affiliations
1 Department of Mathematics, NSCBM Govt. College, Hamirpur-177005, Himachal Pradesh, IN
2 Department of Mathematics, Govt. College, Nurpur-177 103, District Kangra, Himachal Pradesh, IN
3 Department of Mathematics, Govt. College, Barsar, District Hamirpur, Himachal Pradesh, IN
1 Department of Mathematics, NSCBM Govt. College, Hamirpur-177005, Himachal Pradesh, IN
2 Department of Mathematics, Govt. College, Nurpur-177 103, District Kangra, Himachal Pradesh, IN
3 Department of Mathematics, Govt. College, Barsar, District Hamirpur, Himachal Pradesh, IN
Source
International Journal of Technology, Vol 6, No 2 (2016), Pagination: 71-80Abstract
Triple-diffusive convection in a horizontal layer of nanofluid heated from below and salted from above and below is considered. The Rivlin-Ericksen type fluid model is used to describe the rheological behavior of viscoelastic nanofluid. The effects of thermophoresis and Brownian diffusion parameters are also introduced through Buongiorno model in the governing equations. By using linear stability analysis and normal modes analysis method, the dispersion relation accounting for the effect of various parameters is derived. The influences of solute-Rayleigh number, analogous solute-Rayleigh number, thermo-nanofluid Lewis number, modified diffusivity ratio and nanoparticle Rayleigh number on the stability of stationary convection are presented analytically and graphically.Keywords
Convection, Triple-Diffusive, Nanofluid, Nanoparticles, Rayleigh Number.- Thermal Instability of Rotating Kuvshiniski Viscoelastic Nanofluid in a Porous Medium
Abstract Views :182 |
PDF Views:3
Authors
Affiliations
1 Department of Mathematics, Government College Nurpur, Himachal Pradesh, IN
2 Department of Mathematics, NSCBM Govt. College, Hamirpur-177005, Himachal Pradesh, IN
3 Department of Mathematics, Government College Barsar, Himachal Pradesh, IN
1 Department of Mathematics, Government College Nurpur, Himachal Pradesh, IN
2 Department of Mathematics, NSCBM Govt. College, Hamirpur-177005, Himachal Pradesh, IN
3 Department of Mathematics, Government College Barsar, Himachal Pradesh, IN
Source
Research Journal of Science and Technology, Vol 9, No 1 (2017), Pagination: 1-8Abstract
Thermal instability in a horizontal layer of Kuvshiniski viscoelastic nanofluid for more realistic boundary conditions is studied theoretically within the frame work of linear theory. The flux of volume fraction of nanoparticles is taken to be zero on the isothermal boundaries. For porous medium Brinkman model is taken into consideration and the model used for nanofluid incorporates the effect of Brownian diffusion and thermophoresis. The stability criterion for stationary and oscillatory convection have been derived and graphs have been plotted to study the effects of rotation, the Brinkman-Darcy number, the Lewis number, the modified diffusivity ratio and porosity parameter on the stationary convection.Keywords
Kuvshiniski Viscoelastic Fluid, Rotation, Brownian Motion, Galerkin Technique, Porous Medium.- Revisiting Groundwater Depletion and its Implications on Farm Economics in Punjab, India
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Authors
S. K. Srivastava
1,
Ramesh Chand
2,
Jaspal Singh
1,
Amrit Pal Kaur
1,
Rajni Jain
1,
I. Kingsly
1,
S. S. Raju
3
Affiliations
1 ICAR-National Institute of Agricultural Economics and Policy Research, DPS Marg, Pusa, New Delhi 110 012, IN
2 NITI Aayog, Government of India, New Delhi 110 001, IN
3 ICAR-Central Marine Fisheries Research Institute, Visakhapatnam 530 003, IN
1 ICAR-National Institute of Agricultural Economics and Policy Research, DPS Marg, Pusa, New Delhi 110 012, IN
2 NITI Aayog, Government of India, New Delhi 110 001, IN
3 ICAR-Central Marine Fisheries Research Institute, Visakhapatnam 530 003, IN
Source
Current Science, Vol 113, No 03 (2017), Pagination: 422-429Abstract
The study identifies factors behind the groundwater depletion in Punjab (India) and examines the economics of groundwater irrigation across farm-size categories, varied groundwater levels and energy policy scenario. The farm-level evidences point out that farmers with smaller land holdings incur 2-3 times groundwater cost than those with larger land holdings. Also, small farmers are affected more adversely due to falling groundwater level. Further, financial expenses in extracting groundwater are borne equally by the society and the farmers. The withdrawal of energy subsidy is expected to reduce net returns, but at a varying rate across different crops. However, crop cultivation would still be profitable and desubsidization will result in 29-82% savings in existing groundwater use in different crops.Keywords
Crop Profitability, Energy Subsidy, Farm Economics, Groundwater Depletion.References
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- Evaluation of Resistance for Early Blight Caused by Alternaria solani (Ellis and Martin) Sorauer in Tomato
Abstract Views :252 |
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Authors
Affiliations
1 Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi (U.P.), IN
2 Division of Crop Improvement, Indian Institute of Vegetable Research, Varanasi (U.P.), IN
3 ICAR, CAZRI, KrishiVigyan Kendra, Pali (Rajasthan), IN
1 Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi (U.P.), IN
2 Division of Crop Improvement, Indian Institute of Vegetable Research, Varanasi (U.P.), IN
3 ICAR, CAZRI, KrishiVigyan Kendra, Pali (Rajasthan), IN
Source
Asian Journal of Bio Science, Vol 12, No 2 (2017), Pagination: 87-99Abstract
A trial was conducted during Rabi season 2011-2012 under field conditions for phenotyping of germplasm under natural conditions that have been developed for resistance against early blight of tomato caused by Alternaria solani. Field studies showed significant variation among all tested germplasmlines with respect to early blight disease assessment. Under field conditions the natural disease severity was scored on a five-point scale (0-5).The per cent disease index (PDI) and area under disease progress curve (AUDPC) value were calculated on the basis of data recorded. The mean AUDPC value in resistant (206 lines); moderately resistant (223 lines); moderately susceptible (129 lines) and susceptible (143 lines) tomato lines ranged between 102.00 to 447.25; 447.26 to 792.50; 792.51 to 1137.75 and 1137.76 to 1483.00, respectively.Keywords
Alternaria solani, Tomato, Natural Inoculums, Phenotyping, Resistant, AUDPC.References
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