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Sivasubramanian, P.
- Sapphirine-Bearing Assemblages from Perumalmalai, Palani Hills, Tamil Nadu
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Authors
Affiliations
1 Department of Geology, University of Mysore, Mysore 570006, IN
2 National Geophysical Research Institute, Hyderabad 500007, IN
1 Department of Geology, University of Mysore, Mysore 570006, IN
2 National Geophysical Research Institute, Hyderabad 500007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 38, No 5 (1991), Pagination: 532-537Abstract
A new find of sapphirine-bearing granulite rocks from Perumalmalai area, 15 km from Kodaikanal is reported. These rocks, contain in addition to sapphirine, cordierite-garnet-orthopyroxene-spinel-biotite-plagioclase. Among the pairs, garnetcordierite gives pressure of 8.5 kb at temperature of 550°C; garnet-orthopyroxene gives 6 kb at 800°C and cordierite-garnet-sapphirine gives 7.2 kb at 700°C. The sapphirineforming reaction probably took place after the main charnockite event. Evidences of decompression of garnet breaking down to orthopyroxene-spinel-plagioclase-biotite at rather high temperatures indicates rapid uplift.Keywords
Sapphirine, Perumalmalai, Palani Hills, Tamil Nadu, Geobarometry, Granulites.
- Rock Melt Extrusion at Abishekapatti, Tirunelveli District, Tamil Nadu
Abstract Views :236 |
PDF Views:146
Authors
Affiliations
1 Department of Geology, V.O. Chidambaram College, Tuticorin - 628 008, IN
2 Geological Survey of India, Mangalore - 575 003, IN
1 Department of Geology, V.O. Chidambaram College, Tuticorin - 628 008, IN
2 Geological Survey of India, Mangalore - 575 003, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 57, No 5 (2001), Pagination: 464-466Abstract
No Abstract.Full Text
- Safety of Botanical and Microbial Pesticide Mixtures to Trichogramma chilonis Ishii (Hymenoptera: Trichogrammatidae)
Abstract Views :221 |
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Authors
Affiliations
1 Department of Agricultural Entomology, Agricultural College and Research Institute, Madurai, 625 104, Tamil Nadu, IN
1 Department of Agricultural Entomology, Agricultural College and Research Institute, Madurai, 625 104, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 19, No 1 (2005), Pagination: 23-29Abstract
Laboratory experiments were conducted to study the effects of botanical (neem, sweet-flag and pongamia) and microbial pesticide mixtures (HaNPV, Bacillus thuringiensis (=Spicturin) and spinosad) on adult mortality and adult emergence of the egg parasitoid, Trichogramma chilonis. In contact toxicity test, neem + sweet-flag and neem + sweet-flag + pongamia at 0.12 and 0.18 per cent concentrations registered up to 33.89 per cent mortality of adult parasitoids while the same concentrations had 79.58 to 81.00 per cent adult emergence. Experiments with mixtures of microbial pesticides revealed that spinosad at 75 g a. i./ha and its combination with HaNPV or Spicturin or with both registered cent per cent adult mortality in 24 hours. Also, spinosad or its combinations registered poor adult emergence of this parasitoid, which ranged from 13.08 to 13.83 while HaNPV and Spicturin registered adult emergence of 93.33 and 93.58 per cent. The possibilities of using the botanical mixtures or microbial pesticide mixtures along with this parasitoid are discussed.Keywords
Botanical Insecticides, Ha Npv, Spicturin, Spinosad, Trichogramma chilonis.Full Text
- Analysis of Dynamic Behavior of a Pre-Stretched Circular Hyper Elastic Membrane with Finite Deformation
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International Journal of Innovative Research and Development, Vol 2, No 3 (2013), Pagination: 771-787Abstract
This paper deals with the dynamic analysis of the linear vibration response of a prestretched circular hyper elastic membrane with large deformation. Geometrical as well as material nonlinearity come together due to finite deformations and a hyper elastic constitutive relationship. The membrane material is assumed to be isotropic, homogeneous, and Neo-Hookean. A commercial finite element code ANSYS is used to perform the prestressed modal analysis as well as hyper elastic material curve fitting. The results are compared to the analytical solutions obtained from literature. The effect of stretching ratio and membrane thickness on the mode frequencies, shapes and order is studied. The increase in stretching ratio increases the concentration of in plane modes in the lower frequencies, and also decreases the frequency of the same. The out of plane modes are dominant in the lower frequencies at lower stretch ratios due to the predominance bending stiffness compared to membrane stiffness. Finally, the influence of the hyper elastic constitutive laws on linear vibrations is investigated. Results show that the selection of appropriate hyper elastic material model plays a crucial part in getting the correct results.Keywords
Hyper Elastic, Stretch Ratio, Neo-hookean, ANSYSFull Text
- Field Efficacy of Pseudomonas fluorescens against the Cotton Leaf Hopper, Amrasca devastans Distant (Hemiptera:Aphididae) in Bt and Non Bt Cotton
Abstract Views :212 |
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Authors
Affiliations
1 Department of Entomology, Vanavarayar Institute of Agriculture, Manakkadavu, Pollachi (T.N.), IN
2 The Gandhigram Rural Institute - Deemed University, Gandhigram, Dindigul (T.N.), IN
3 Department of Entomology, Tamil Nadu Agriculture University, Coimbatore (T.N.), IN
1 Department of Entomology, Vanavarayar Institute of Agriculture, Manakkadavu, Pollachi (T.N.), IN
2 The Gandhigram Rural Institute - Deemed University, Gandhigram, Dindigul (T.N.), IN
3 Department of Entomology, Tamil Nadu Agriculture University, Coimbatore (T.N.), IN
Source
Agriculture Update, Vol 12, No 4 (2017), Pagination: 706-713Abstract
An experiment was conducted to evaluate the efficacy of Pseudomonas fluorescens against leafhopper of Bt cotton and non Bt cotton in two location of Vanavarayar Institute of Agriculture, Pollachi and South Indian Millers Association, Udumelpet. Seven treatments i.e. foliar application of P. fluorescens @1%, soil application of P. fluorescens 2.5 kg/ha, soil and foliar application of P. fluorescens @1%, foliar application of P. fluorescens @1% and Beauveria basianna @ 1%, foliar application of Beauveria basianna @ 1%, imidacloprid 200 SL @ 200ml/ha and Untreated check were evaluated. Among the bio inoculants treatment the maximum per cent reduction in leafhopper population with a mean of 71.00; 83.45; 85.01 and 63.28; 82.32; 91.58 at 1st, 2nd and 3rd spray after application in both the locations respectively in Bt cotton during 2013-14. The similar trend was also observed in non Bt cotton. During 2014-15, the maximum per cent reduction in leafhopper population recorded among the bio inoculants treatment, the soil and foliar application of P. fluorescens @1% in two locations and both bt and non Bt cotton. The highest mean seed cotton yield was obtained in soil and foliar application of P. fluorescens @1% in two locations, and both years of 2013-14 and 2014-15.Keywords
Bioefficacy, Biopesticides, Pseudomonas fluorescens, Bt Cotton, Non Bt Cotton, Leafhopper.References
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- Bandi, Sanjay and Sivasubramanian, P. (2012). Management of Thrips tabaci Lindeman in onion using Pseudomonas fluorescens Migula through induced resistance. J. Biopest., 5(1): 1-3.
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- Bandi, Sanjay and Sivasubramanian, P. (2012). Management of Thrips tabaci Lindeman in onion using Pseudomonas fluorescens Migula through induced resistance. J. Biopest., 5(1): 1-3
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- Devi, K.K. and Kothamasi, D. (2009).Pseudomonas fluorescens CHA0 can kill subterranean termite Odontotermes obesus by inhibiting cytochrome c oxidase of the termite respiratory chain. FEMS Microbiol. Lett., 300 : 195–200 10.1111/j.1574-6968.2009.01782.x
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- Razaq, M., Haneef, Q., Athar, H. R., Nasir, M. and Afzal, M., (2014). Interactive effect of nitrogen and insecticide on Jassid, Amrasca devastans (Dist.) population and photosynthetic capacity of okra Abelmoschus esculentus (L.) Moench. Pakistan J. Zool., 46: 577-579.
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- Field Efficacy of Pseudomonas fluorescens against the Cotton Aphid, Aphis gossypii Glover (Hemiptera:Aphididae) in Bt and Non Bt Cotton
Abstract Views :218 |
PDF Views:0
Authors
Affiliations
1 Department of Entomology, Vanavarayar Institute of Agriculture, Manakkadavu, Pollachi (T.N.), IN
2 The Gandhigram Rural Institute - Deemed University, Gandhigram, Dindigul (T.N.), IN
3 Department of Entomology, Tamil Nadu Agriculture University, Coimbatore (T.N.), IN
1 Department of Entomology, Vanavarayar Institute of Agriculture, Manakkadavu, Pollachi (T.N.), IN
2 The Gandhigram Rural Institute - Deemed University, Gandhigram, Dindigul (T.N.), IN
3 Department of Entomology, Tamil Nadu Agriculture University, Coimbatore (T.N.), IN
Source
Agriculture Update, Vol 12, No 4 (2017), Pagination: 720-728Abstract
The cotton aphid, Aphis gossypii Glover (Hemiptera: Aphididae), is a key pest of cotton, irrespective of the use of conventional or organic management. In organic systems, however, the use of synthetic insecticides is not allowed, increasing the difficulty of controlling this pest. This work evaluated aphid control and the ability of products to prevent aphid infestation using entomopathogenic bacteria, Pseudomonas fluorescens compared to a standard synthetic insecticide. The trial was conducted with entomopathogenic fungi, Beauveria bassiana and untreated plants served as the control group. The trial testing the efficacy of P. fluorescens in preventing aphid infestation was conducted using the same products. The evaluations were conducted pre and post-treatment of three round of application for the efficacy and the protection against colonization trials, respectively. The lowest aphid populations recorded by the bio inoculant treatment of the soil and foliar application of P. fluorescens @1%. Regarding the plant protection against aphid colonization, the insecticide imidacloprid exhibited a better performance compared to the other tested products with steady results over the evaluation period. The other treatments exhibited variable results with protection against aphid colonization throughout the evaluation period.Keywords
Cotton Aphid, Pseudomonas fluorescens, Alternative Control, Bt Cotton, Non Bt Cotton.References
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