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Pathogenicity of Macrophomina phaseolina and Fusarium verticilloides in Okra
Begum Mashooda,Lokesh S.,Kumar T. Vasanth The Korean Society for Integrative Biology 2005 Integrative biosciences Vol.9 No.1
In okra Macrophomina phaseolina and Furasium verticilloides cause collar-rot, seedling-rot and other severe diseases at fruit maturing stages. These stages were located in all the components of the seeds. The seeds collected from seeds infected with Macrophomina phaseolina and Fusarium verticilloides revealed 100% infection. Such seeds resulted in pre- and post-emergence mortalities. Inoculated seeds also showed pre- and post-emergence death of the seedlings. The fungi seed-transmitted showed disease symptoms at different growth of okra plant. Fusarium verticilloides causes the wilt and Macrophomina phaseolina causes the collar-rot. Until now seed transmission of these fungi have not been studied. Hence, in the present study an attempt has been made to fill this lacunae.
Pathogenicity of Macrophomina phaseolina and Fusarium verticilloides in Okra
Mashooda Begum,S. Lokesh,T. Vasanth Kumar 한국통합생물학회 2005 Animal cells and systems Vol.9 No.1
In okra Macrophomina phaseolina and Furasium verticilloides cause collar-rot, seedling-rot and other severe diseases at fruit maturing stages. These stages were located in all the components of the seeds. The seeds collected from seeds infected with Macrophomina phaseolina and Fusarium verticilloides revealed 100% infection. Such seeds resulted in pre- and post-emergence mortalities. Inoculated seeds also showed pre- and post-emergence death of the seedlings. The fungi seed-transmitted showed disease symptoms at different growth of okra plant. Fusarium verticilloides causes the wilt and Macrophomina phaseolina causes the collar-rot. Until now seed transmission of these fungi have not been studied. Hence, in the present study an attempt has been made to fill this lacunae.
P. Siva Kota Reddy,B. Prashanth,T. R. Vasanth Kumar 장전수학회 2011 Advanced Studies in Contemporary Mathematics Vol.21 No.4
In this paper, we define the antipodal signed digraph A(D) of a given signed digraph S = (D, σ) and offer a structural characterization of antipodal signed digraphs.Further, we characterize signed digraphs S for which S ~ A(S) and S ~ A (S) where denotes switching equivalence and A (S) and S are denotes the antipodal signed digraph and complementary signed digraph of S respectively.
Dravya: a Putative Organic Treatment against Alternaria padwickii Infection in Paddy
Sathyanarayana, S.G.,Lokesh, S.,Vasanth Kumar, T.,Shetty, H.S. The Korean Society for Integrative Biology 2006 Integrative biosciences Vol.10 No.1
In the present study, Dravya-an organic compound used for seed treatment along with the common fungicides to test its compatibility in the management of Alternaria padwickii in paddy. Dravya (a sea weed extract) was found highly compatible with fungicides like Bavistin and Dithane M-45. Incidence of Alternaria padwickii and Bipolaris oryzae was also reduced to a greater extent in the paddy seed samples of Dravya treatment. On the other hand, it also enhanced the seed germination and seedling vigour. Seedlings of treated samples also showed enhanced activity of peroxidase upon challenge inoculation with Alternaria padwickii. The enzyme activity in the seedlings challenged with the pathogen was two fold more over control. The suppression in disease incidence in growing plants indicated the promising effect of Dravya and Dithane M-45 under green- house conditions.
Dravya-A Putative Organic Treatment Against Alternaria padwickii Infection in Paddy
Sathyanarayana S. G,Lokesh S.,Vasanth Kumar T.,Shetty H. S. The Korean Society of Plant Pathology 2006 Plant Pathology Journal Vol.22 No.1
Innate defence mechanism in plants can be triggered and enhanced by certain agents, referred as inducers against broad range of pathogens. In the present study, Dravya (a sea weed extract) was highly compatible with commonly available synthetic fungicides, Bavistin and Dithane M-45. Incidence of Alternaria padwickii and Bipolaris oryzae was also reduced to a greater extent in the paddy seed samples in Dravya treatment. Dravya also enhanced the seed germination and seedling vigour. Seedlings of treated samples also showed enhanced activity of peroxidase upon challenge inoculation with Alternaria padwickii. The enzyme activity was two fold high after the inoculation of pathogen. The suppression in disease incidence in growing plants indicated the promising effect of Dravya and Dithane M-45 under green-house condition.
Dravya: a Putative Organic Treatment against Alternaria padwickii Infection in Paddy
S. G. Sathyanarayana,S. Lokesh,T. Vasanth Kumar,H. S. Shetty 한국통합생물학회 2006 Animal cells and systems Vol.10 No.1
In the present study, Dravya-an organic compound used for seed treatment along with the common fungicides to test its compatibility in the management of Alternaria padwickii in paddy. Dravya (a sea weed extract) was found highly compatible with fungicides like Bavistin and Dithane M-45. Incidence of Alternaria padwickii and Bipolaris oryzae was also reduced to a greater extent in the paddy seed samples of Dravya treatment. On the other hand, it also enhanced the seed germination and seedling vigour. Seedlings of treated samples also showed enhanced activity of peroxidase upon challenge inoculation with Alternaria padwickii. The enzyme activity in the seedlings challenged with the pathogen was two fold more over control. The suppression in disease incidence in growing plants indicated the promising effect of Dravya and Dithane M-45 under green- house conditions.
Dravya-A Putative Organic Treatment Against Alternaria padwickii Infection inPaddy
S. G. Sathyanarayana,S. Lokesh,T. Vasanth Kumar,H. S. Shetty 한국식물병리학회 2006 Plant Pathology Journal Vol.22 No.1
Innate defence mechanism in plants can be triggered and enhanced by certain agents, referred as inducers against broad range of pathogens. In the present study, Dravya (a sea weed extract) was highly compatible with commonly available synthetic fungicides, Bavistin and Dithane M-45. Incidence of Alternaria padwickii and Bipolaris oryzae was also reduced to a greater extent in the paddy seed samples in Dravya treatment. Dravya also enhanced the seed germination and seedling vigour. Seedlings of treated samples also showed enhanced activity of peroxidase upon challenge inoculation with Alternaria padwickii. The enzyme activity was two fold high after the inoculation of pathogen. The suppression in disease incidence in growing plants indicated the promising effect of Dravya and Dithane M-45 under green-house condition.