Dhingra, Onkar D.
Most widely held works by Onkar D Dhingra
Basic plant pathology methods by Onkar D Dhingra ( Book )
25 editions published between 1985 and 1995 in 4 languages and held by 412 libraries worldwide
Sterilization of apparatus and culture media; Culture of pathogens; Long-term storage of plant pathogens; Detection and estimation of inoculum; Establishment of disease and testing for resistance; Soil microorganisms; Fungicide evaluation; Biological control; Bright-field microscopy techniques.
An annotated bibliography of soybean diseases, 1882-1974 by J. B Sinclair ( Book )
2 editions published in 1975 in English and held by 58 libraries worldwide
An annotated bibliography of Macrophomina phaseolina, 1905-1975 by Onkar D Dhingra ( Book )
4 editions published in 1977 in English and held by 23 libraries worldwide
Biology and pathology of Macrophomina phaseolina by Onkar D Dhingra ( Book )
3 editions published in 1978 in English and held by 18 libraries worldwide
Taxonomy and nomeclature. Physiology. Behavior in soil. Epidemiology. Pathogenesis. Special methods of study. Diseases on selected hosts.
Basic plant pathology methods ( Book )
2 editions published between 1987 and 1995 in Undetermined and English and held by 2 libraries worldwide
Patologia de semente de soja by O.D Dhingra ( Book )
2 editions published in 1997 in Portuguese and held by 2 libraries worldwide
Consideracoes gerais; Infeccao por fungos; Mecanismos de infeccao; Fatores que influenciam a infeccao; Efeitos na semente; Reducao de infeccao; Fungos de armazenamento; Patogenos que infectam sementes; Phomopsis/diaporthe; Cercospora kikuchii; Cercospora sojina; Colletrotrichum truncatum; Fusarium spp; Peronospora manshurica; Macrophomina phaseolina; Nematospora coryli; Alternaria spp; Corynespora cassicola; Myrothecium roridum; Trichothecium roseum; Pseudomonas syringae pv. glycinea; Xanthomonas campestris pv. glycines; Bacillus subtilis; Virus do mosico-comum-da-soja; Virus da mancha-anelar-do-fumo; Virus da mancha-anelar-do-tomate; Tratamento de sementes; Metodos de analise de sementes; Exame das sementes secas; Teste de blotter; Teste em meio de agar; Teste de sintomas em plantulas.
An annotated bibliography of soybean diseases 1882-1974 ( Book )
1 edition published in 1975 in English and held by 2 libraries worldwide
Biology and pathology of Macrophomina phaseo lina ( Book )
1 edition published in 1978 in English and held by 2 libraries worldwide
Tratamento de sementes : (controle de patógenes) by Onkar D Dhingra ( Book )
1 edition published in 1980 in Portuguese and held by 2 libraries worldwide
Tratamento de sementes controle de patogenos by O.D Dhingra ( Book )
2 editions published in 1980 in Portuguese and held by 1 library worldwide
Historico do tratamento de sementes; Por que tratar as sementes? Como os patogenos sao transportados nas sementes; Principais tecnicas de tratamento de sementes; Fungicidas utilizados no tratamento de sementes; Aspectos teoricos sobre o tratamento de sementes; Bioensaios sobre aplicacao de fungicidas em sementes.
Effect of soil moisture and carbon nitrogen ratio on survival of Macrophomina phaseolina in soybean stems in soil by O.D Dhingra ( Book )
1 edition published in 1974 in English and held by 1 library worldwide
The number of recoveries of Macrophomina phaseolina (M.phaseoli, Rhizoctonia bataticola) from infected soybean stem pieces, which were mixedin either of two soil types, decreased with increasing soil moisture from 20 to 100% moisture-holding capacities (MHC). The fungus was not recovered from stem pieces at 100% MHC for 4 weeks in either soil type.The number of recoveries from stem pieces in soils with high carbon: nitrogen (C:N) ratio amendments (40 and 80) were less than those of lowC:N ratio amendments (10 and 20). Reduction in the number of viable sclerotia may be brought about in the field by keeping soil moisture above 60% of its MHC at 30oC or above for 3 to 4 weeks.
Essential oil of mustard to control Rhizoctonia solani causing seedling damping off and seedling binght in nursery by O. D Dhingra ( Book )
1 edition published in 2004 in English and held by 1 library worldwide
Fusarium semitectum e Phomopsis sp. afetando a qualidade de sementes de feijao-de-vagem by O.D Dhingra ( Book )
1 edition published in 1978 in Portuguese and held by 1 library worldwide
Feijao-de-vagem; Phaseolus vulgaris; Fusarium semitectum; Phomopsis sp.; Tricothecium roseum; Minas Gerais.
Effect of planting time on seed infection by Phomopsis sojae in ten soybean cultivars by O.D Dhingra ( Book )
1 edition published in 1979 in Portuguese and held by 1 library worldwide
Cultivares de soja dos grupos de maturacao VI ('Parana' e 'Perola'), VII ('Bragg' e 'Bossier'), VIII ('Vicoja', 'Santa Rosa', 'Sao Luiz', IAC-2 e 'UFV-2') e do IX ('UFV-1') foram plantadas em blocos casualizados na fazenda experimental da Universidade Federal de Vicosa, Minas Gerais. O plantio foi efetuado na epoca normal e um mes mais tarde, e a colheita realizada na epoca de maturacao normal. O plantio tardio reduziu o periodo para a maturacao de 8 a 23 dias, dependendo do cultivar. Phomopsis sojae foi o principal fungo isolado em todos os cultivares, em ambas as epocas de plantio. Um a 5% das sementes de todos os cultivares foram infectadas com P. sojae no plantio tardio, exceto 'IAC-2', 'UFV-2' e 'UFV-1', enquanto 14 a 48% das sementes foram infetadas, considerando-se o plantio regular. Houve diferencas significativas entre cultivares, quando se compararam as porcentagens de sementes infetadas com P. sojae, quando o plantio foi realizado na epoca normal. A maioria dos cultivares plantados tardiamente escapou de chuvas durante a maturacao, o que nao ocorreu com os cultivares 'Bragg', 'Parana' e 'Perola', que tiveram significativamente menor porcentagem de sementes infectadas com P. sojae, que quando plantadas na epoca normal. A percentagem de emergencia nao foi afetada pela infeccao de P. sojae nas sementes, mas houve correlacao significativa (r = 0,94) entre a porcentagem de sementes infectadas por P. sojae e a porcentagem de plantulas com lesoes necroticas. O plantio tardio de cultivares de soja de maturacao precose e recomendado para a regiao de Vicosa, na producao de sementes sadias.
Infusion of fungicides into soybean seeds with intact seed coats by organic solvents by O.D Dhingra ( Book )
1 edition published in 1982 in English and held by 1 library worldwide
Benomyl, thiophanate-methyl, PCNB and chlorothalonil penetrated the seed coats of intact soybean seeds soaked in fungicide solvent mixtures of dichloromethane, trichloromethane and carbontetrachloride, respectively, when soaked for periods of 30 minutes to 24 hours. Acetone aided the penetration of benomyl and thiophanate-methyl only into the seedeoat with no increase in fungicide concentration with increased immersion time. No fungicide penetrated, using any of the solvents, into the cotyledons of seeds with intact seedcoats. Conversely, benomyl and thiophanate-methyl penetrated the cotyledons of seeds with broken seedcoats immersed in fungicide-solvent mixtures and the concentration of each fungicide increased with increased immersion time. None of the solvents showed toxic effects on the seeds immersed for up to 24 hours. Fungicides applied to diseased seeds in organic solvents or as dusts significantly increased seedling emergence over the nontreated control when the fungicide was not removed from the seed surface. Emergence was similar to the nontreated control when the fungicide was removed from seeds dusted with any of the fungicides and from those treated with chlorothalonil or PCNB in acetone. The emergence of seeds treated with each of the fungicides in the solvents or with benomyl of thiophanate-methyl in acetone was higher than nontreated seeds, when fungicides were washed from the seed surface.
An annotated bibliography of soybean diseases 1882-1974 by J. B Sinclair ( Book )
1 edition published in 1975 in English and held by 1 library worldwide
An annotated bibliography of Macrophomina phaseolina 1905-1975 ( Book )
1 edition published in 1977 in English and held by 1 library worldwide
Annotated Bibliography of Soybean Diseases by University of Illinois. International Soybean Program ( Book )
1 edition published in 1975 in English and held by 1 library worldwide
An annotated bibliography of soybeandiseases, 1882-1974 by James Burton Sinclair ( Book )
1 edition published in 1975 in Undetermined and held by 1 library worldwide
Dhingra, O. D.
Dhingra, O. D. (Onkar D.)