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Dutta, H. S.
- Efficacy of Pseudomonas fluorescens and Trichoderma viride Based Bioformulation for Management of Bacterial Wilt Disease of Ginger
Abstract Views :302 |
PDF Views:0
Authors
Popy Bora
1,
L. C. Bora
2,
P. C. Deka
1,
Bikram Borkotoki
3,
A. K. Sharma
1,
H. S. Dutta
1,
Debahaj Buhagohain
1
Affiliations
1 Krishi Vigyan Kendra, Sonitpur (Assam), IN
2 Department of Plant Pathology, Assam Agricultural University, Jorhat (ASSAM), IN
3 Regional Research Station (A.A.U.), North Lakhimpura (Assam), IN
1 Krishi Vigyan Kendra, Sonitpur (Assam), IN
2 Department of Plant Pathology, Assam Agricultural University, Jorhat (ASSAM), IN
3 Regional Research Station (A.A.U.), North Lakhimpura (Assam), IN
Source
International Journal of Plant Sciences, Vol 11, No 2 (2016), Pagination: 180-186Abstract
An experiment was conducted to evaluate the efficacy of a consortia formulation of Pseudomonas fluorescens and Trichoderma harzianum for management of bacterial wilt disease of ginger in Assam. Inhibitory effect of the biocontrol agents was evaluated in vitro following dual culture assay method for their efficacy against Ralstonia solanacearum, the ginger wilt pathogen. Quantitative assay of population dynamics of the two antagonists, mass cultured in organic substrates viz., vermicompost (VC) and mustard oil cake (MOC) revealed that the antagonists maintained a high population count up to 120 days of storage at room temperature. Pseudomonas fluorescens recorded highest average population (45.47 x 107cfu/g) when mass cultured in the mixture of VC and MOC, while T. harzianum recorded maximum average population (34.14 x 107cfu/g) when mass cultured in MOC. Bioformulations were further evaluated for their efficacy in ginger wilt management under field condition. Efficacy of one fungicide (Copper oxychloride) and an antibiotic (Streptocycline) was also tested for comparison. Lowest disease incidence (15.63%) was recorded in the treatment of seed treatment (ST) and soil application (SA) of P. fluorescens and T. harzianum consortia mass cultured in the mixture of VC and MOC. It was followed by ST and SA of T. harzianum mass cultured in MOC (21.88%), which was statistically at par with the application of copper oxychloride (26.25%).Keywords
Antagonists, Bacterial Wilt, Biological Management, Ginger, Substrates.References
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- Analytical Study of Highly Sensitive Mems Based Bragg Grating Pressure Sensor
Abstract Views :357 |
PDF Views:111
Authors
K. Das
1,
H. S. Dutta
2
Affiliations
1 Dept. of Electronics and Communication Engineering, St. Thomas College of Engineering and Technology, Kolkata, IN
2 Dept. of Electronics and Communication Engineering, Kalyani Government Engineering College, Kalyani, IN
1 Dept. of Electronics and Communication Engineering, St. Thomas College of Engineering and Technology, Kolkata, IN
2 Dept. of Electronics and Communication Engineering, Kalyani Government Engineering College, Kalyani, IN
Source
Reason-A Technical Journal (Formerly Reason-A Technical Magazine), Vol 15 (2016), Pagination: 102-111Abstract
A model of MEMS based Bragg Grating Pressure Sensor is analytically proposed in this paper. In MEMS pressure sensor, the shift of wavelength of only one Bragg grating incorporated into a waveguide gives an erroneous outcome because of the cross sensitivity rendered by different parameters including temperature. In this design, the sensor consisting of dual identical Waveguide Bragg Gratings (WBGs) integrated in a curved waveguide in silicon micro-machined circular diaphragm is presented. The pitch of the Bragg gratings changes upon the application of pressure on the diaphragm, and hence, the corresponding wavelength is shifted. As the wavelength shifts because of the temperature, in the two identical waveguide gratings in equal amount, the error occurs due to the change of temperature can be eliminated. So, the Pressure Sensitivity (PS) can be measured correctly. A parametric analysis of this proposed sensor is performed utilizing MATLAB 2015a programming. Pressure sensitivities are found to be 2.0 and 1.8 picometre per Pascal for the two Bragg gratings.Keywords
Optical MEMS, Micro-machined Diaphragm, Waveguide Bragg Gratings, Pressure Sensor.References
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