Agricultural College and Research Institute TNAU

Madurai, India

Agricultural College and Research Institute TNAU

Madurai, India

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Nandhakumar M.R.,Tamil Nadu Agricultural University | Velayudham K.,Agricultural College and Research Institute TNAU | Thavaprakaash N.,Krishi Vigyan Kendra TNAU
Research on Crops | Year: 2016

Field experiments were carried out at Tamil Nadu Agricultural University, Coimbatore, India during samba (August-December) seasons of 2012 and 2013 to find out the optimum crop geometry, age and number of seedlings on growth and physiological characters in relation to yield of low land rice. The experiment consisted of three mainplot treatments viz., M1-25 x 25 cm, M2-25 x 20 cm and M3-25 x 15 cm and six sub-plot treatments S1-14 day old seedlings (DOS)+1 seedling/hill, S2-14 DOS+2 seedlings/hill, S3-14 DOS+3 seedlings/hill, S4-21 DOS+1 seedling/hill, S5-21 DOS+2 seedlings/hill and S6-21 DOS+3 seedlings/hilland replicated thrice in a split plot design. The results revealed that plant spacing, age and number of seedlings/hill showed all physiological parameters highest under this combination of M1S1 and recorded higher grain yield (7191 and 7414 kg/ha) during 2012 and 2013, respectively, and it was statistically comparable with M2S1, M2S5 and M3S5.


Ramjegathesh R.,Tamil Nadu Agricultural University | Ebenezar E.G.,Agricultural College and Research Institute TNAU | Muthusamy M.,Agricultural College and Research Institute TNAU
Plant Pathology Journal | Year: 2011

Field experiment was carried out to assess the efficacy of plant oils, plant extracts and antagonistic microorganisms against leaf blight disease of onion caused by Alternaria alternata. Two sprays of neem oil (3%) given on onion plants at the first appearance of the disease and the second on 15 days later recorded significantly the lowest percent disease index (22.22%) and besides increasing the yield. In plant extracts Acorus calamus rhizome extract 10% was significantly reduced the disease incidence (34.78%) followed by Mentha arvensis leaf extract. © 2011 Asian Network for Scientific Information.


Geetha P.,Agricultural College and Research Institute TNAU | Geetha P.,Sugarcane Breeding Institute | Balasubramaniyan P.,Agricultural College and Research Institute TNAU | Balasubramaniyan P.,Dry Land Agricultural Research Station TNAU
Annals of Agri Bio Research | Year: 2016

A field experiment was conducted to study the effect of integrated nutrient management practices on non-basmati quality rice cultivars viz., Jeeraga Samba, Kitchili Samba and Improved White Ponni during samba season (September-February, 2008) at Central Farm of Agricultural College and Research Institute (TNAU), Madurai, Tamil Nadu. The experiment was laid out in split plot design with four replications. Three cultivars such as Jeeraga Samba (V1), Kitchili Samba (V2) and White Ponni (V3) formed the main plot treatments and four methods of nutrient management such as green manure @ 6.25 t/ha+50% recommended dose of fertilizer (S1), green manure @ 6.25 t/ha+LCC based N management (S2), LCC based N management alone (S3) and recommended dose of fertilizer (75.0: 37.5: 37.5 kg/ha of N, P2O5and K20) (S4) constituted the sub-plot treatments. The variety Jeeraga Samba (V1) recorded significantly higher plant height (69.2, 119.1 and 129.7 cm), LAI (2.72, 5.84 and 5.62) and DMP (861.3, 1738 and 12517 kg/ha) at tillering, panicle initiation and at harvest, respectively. Among the nutrient management treatments, application of green manure @ 6.25 t/ha along with 50% recommended dose of fertilizer (S1) recorded significantly higher plant height (69.5, 116.7 and 130.4 cm), LAI (1.67, 4.66 and 5.22) and DMP (836, 1472 and 11658 kg/ha) at tillering, panicle initiation and at harvest, respectively. Higher number of panicles/m2 (471), 1000-grain weight (17.43), ill-filled grains (11.12) and grain yield (3014 kg/ha) were recorded in White Ponni (V3). Among nutrient managements, application of green manure @ 6.25 t/ha+LCC based N management (S2) recorded higher number of panicles/m2 (465), 1000-grain weight (13.88), lowest number of ill-filled grains (9.90) and higher grain yield (3769 kg/ha). From the results, it is evident that application of green manure @ 6.25 t/ha+LCC based N management can be done to increase the yield of low N requiring non-basmati quality cultivar, White Ponni.


Murali Baskaran R.K.,Agricultural College and Research Institute TNAU | Rajavel D.S.,Agricultural College and Research Institute TNAU | Manisegaran S.,Agricultural College and Research Institute TNAU | Bagyaraj K.,Agricultural College and Research Institute TNAU | And 2 more authors.
Pestology | Year: 2011

Application of thiamethoxam 30% FS at 5.0-8.0 ml/kg seed as seed treatment was effective in reducing the incidence of early crop stage insect pests like shoot fly, stem borer, aphids and termite. Since the lower dose rate of thiamethoxam 30% FS @ 5.0 ml/kg of seed is showing good control of early stage pest complex and at par with higher dose rates of thiamethoxam 30% FS @ 7.0 and 8.0 ml/kg of seed, thiamethoxam 30% FS @ 5.0ml/kg of seed can be recommended as optimum dose rate for checking early season pest complex in maize as seed treatment.


Murali Baskaran R.K.,Agricultural College and Research Institute TNAU | Sasikumar S.,Agricultural College and Research Institute TNAU | Rajavel D.S.,Agricultural College and Research Institute TNAU | Suresh K.,Agricultural College and Research Institute TNAU
Pestology | Year: 2012

Among the chemical pesticides tested against eggs of Paragus serratus (Fab.) Dimethoate 30 EC (1.5 ml/lit.) and Endosulfan 35 EC (2 ml/lit.) were equally toxic to eggs, recording 44.0 and 38.0 per cent egg mortality, respectively, 48 hours after treatment. Out of three methods of treatment, chemical pesticides exposed to maggots of P. serratus through thin film technique was more toxic than topical application and prey contamination techniques and the toxicity to maggots was in the order of Dimethoate> Endosulfan>Malathion>Wettable sulphur.


Murali Baskaran R.K.,Agricultural College and Research Institute TNAU | Rajavel D.S.,Agricultural College and Research Institute TNAU | Suresh K.,Agricultural College and Research Institute TNAU | Jayaraj J.,Agricultural College and Research Institute TNAU | Palanisamy N.,Agricultural College and Research Institute TNAU
Pestology | Year: 2012

Application of Alika 22.1 ZC @ 150 and 125 ml/ha dose rates were effective in reducing the population of aphid, leafhopper, thrips, redhairy caterpillar and leaf miner besides recording the highest pod yield and both dose rates were on par with each other. Among standard check chemicals, thiamethoxam 25 WG @ 100 g/ha was effective against sucking pests of groundnut while lambda cyhalothrin 4.9 CS @ 300 ml/ha was effective against redhairy caterpillar and leaf miner only. Hence Alika 22.1 ZC @ 125 ml/ha can be recommended as the best option for managing all the economically important major pests complex in groundnut.


Murali Baskaran R.K.,Agricultural College and Research Institute TNAU | Rajavel D.S.,Agricultural College and Research Institute TNAU | Suresh K.,Agricultural College and Research Institute TNAU | Jayaraj J.,Agricultural College and Research Institute TNAU | Palanisamy N.,Agricultural College and Research Institute TNAU
Pestology | Year: 2012

Application of Ampligo 150 ZC @ 300 and 400 ml/ha dose rates were effective in reducing the population bollworm complex of cotton, besides recording the highest seed cotton yield and both dose rates were on par with each other. Among standard check chemicals, Lambdacyhalothrin 4.9 CS @ 500 ml/ha and Chlorantraniliprole 18.5% SC @ 162 ml/ha were effective against bollworm complex of cotton. Hence Ampligo 150 ZC @ 300 can be recommended as the best for managing bollworm complex of cotton.


Bharathi K.,Agricultural College and Research Institute TNAU | Mohanraj A.,Agricultural College and Research Institute TNAU | Rajavel D.S.,Agricultural College and Research Institute TNAU
Pestology | Year: 2011

Field experiment was conducted at Agricultural College and Research Institute (TNAU), Madurai to evaluate the bio efficacy of Chlorantraniliprole 20% SC at the rate of 10,15,20,25 and 30 g a.i./ha against the following pests viz., Fruit fly (Bactrocera sp), Fruit borer (Helicoverpa armigera), Leaf catterpillar (Diaphania indica), Pumpkin beetle (Auiacophora sp) and Leaf miner (Liriomyza trifolii). Chlorantraniliprole 20% SC at the rate of 20, 25 and 30 g a.i/ha was found to be effective in suppressing the pest population compared to the standard checks and control. These three treatments also recorded the lowest fruit damage and higher yield.


Ramchander S.,Agricultural College and Research Institute TNAU | Ushakumari R.,Agricultural College and Research Institute TNAU | Arumugam Pillai M.,Agricultural College and Research Institute TNAU
Indian Journal of Agricultural Research | Year: 2015

The present study investigated the effects of gamma rays on crop phenotypes on two quality rice varieties viz., White Ponni and BPT 5204. The germination percentage and pollen fertility was found to be greatly affected by mutagenic treatments of gamma radiation in both the varieties which ultimately exhibited linear reduction with increase in dose or concentration of mutagens. The doses or concentrations can be determined by establishing the LD50 value for the mutagen to be used. The expected LD50 values of gamma radiation for White Ponni and BPT 5204 were 354.80 Gy and 288.40 Gy, respectively. Several plant traits like days to fifty per cent flowering, plant height, panicle length, leaf length, leaf breadth, number of productive tillers, number of grains per panicle, thousand grain weight and single plant yield was found to be greatly reduced due to mutagenic treatments. Based on the overall consideration of M1 effects, the variety White Ponni was found to be highly sensitive to mutagens than BPT 5204.


Murau Baskaran R.K.,Agricultural College and Research Institute TNAU | Rajavel D.S.,Agricultural College and Research Institute TNAU | Suresh K.,Agricultural College and Research Institute TNAU | Manisegaran S.,Agricultural College and Research Institute TNAU | Palanisamy N.,Agricultural College and Research Institute TNAU
Pestology | Year: 2010

Bio-efficacy of various dosages of Emamectin Benzoate 5% SG (New Source) were evaluated against lepidopteran pests of cotton (Cv. SVPR 2) under field condition during March to June 2009. The results indicated that two rounds of application of Emamectin benzoate 5% SG (NS) @ 220 g/ha, starting from 50 days after sowing, at fortnightly interval was effective in managing the Helicoverpa armigera Hubner on cotton. Since, Emamectin (NS) @ 220 g/ha wa on a par with lower dose of Emamectin (NS) with respect to yield, Emamectin (NS) @ 190 g/ha can be recommended for the management of H. armigera of cotton.

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