Agricultural College and Research Institute
Agricultural College and Research Institute
Sankar Narayanan U.,Agricultural College and Research Institute |
Muthiah C.,Agricultural College and Research Institute
Electronic Journal of Plant Breeding | Year: 2017
An "In vivo screening of okra germplasm/accessions against sucking pests" was undertaken at Dhadhagoundanpatti village (Alanganallur block) a bhendi growing belt of Madurai district. For this study, thirty okra accessions were screened against sucking pests' viz., aphids, jassids, and whiteflies. The results showed that accessions IC 15027 showed resistant level, IC 90202, IC 90203, IC 90213, IC 90214 found to be moderately resistant to sucking pests.
Ambika S.,Agricultural College and Research Institute |
Sujatha K.,Agricultural College and Research Institute
Legume Research | Year: 2017
In the field experiment Sargassum myricocystum extract at 1% concentration for 3 h soaking with foliar spray 5% at vegetative and flowering stages were effective by recording higher plant height, total chlorophyll content, leaf area index, crop growth rate, relative growth rate and yield attributes, such as pod yield plant-1and seed yield ha-1in both kharif, 2014 and rabi, 2015 seasons. The per cent increase of pod yield plant-1and seed yield ha-1was 13.4 and 18.3%, respectively. The other seaweeds viz., Gracilaria edulis, Caulerpa racemosa were less effective, but the effect was better than water. © 2017, Agricultural Research Communication Centre. All rights reserved.
Nithya N.,Kongunadu Arts and Science College |
Chandrakumar K.,Agricultural College and Research Institute |
Ganesan V.,ACME |
Senthilkumar S.,SASTRA University
Journal of Pharmacology and Toxicology | Year: 2012
Cyclophosphamide (CP) is one among the important therapeutic chemotherapy drug used worldwide. Damage to normal tissues due to toxic metabolites limits the usage of CP efficiently for treating various cancers. In the present study, hepatoprotective effect of Momordica charantia Linn. (Cucurbitaceae) against CP induced hepatotoxicity in rats was evaluated. Hepatocellular damage in rats was induced by injecting CP i.p. (total of 200 mg kg -1, b.wt.) for 2 days. Momordica charantia fruit aqueous extract (MCE) (300 mg kg -1 b.wt.) was administered orally for 12 days for treatment. Protective effect of MCE was evaluated by assessing the liver marker enzymes such as AST, ALT, ALP, LDH and γ-GT in serum, AST and ALT in Hver tissues and biochemical parameters such as total protein, urea, creatinine, uric acid, total and direct bilirubin. Liver marker enzymes and clinical chemistry parameters were significantly altered in CP intoxication. These alterations were significantly normalized in animals administered with MCE. Protective effect of MCE could be due to radical-scavenging and antioxidant properties of the MCE. MCE could had been demonstrated these properties due to the presence of phytochemical components that include polyphenols, alkaloids, terpenoids, glycosides and tannins. Present findings supported that the treatment with MCE could be helpful against hepatocellular damage, owing to its hepatoprotective property. © 2012 Academic Journals Inc.
Mini M.L.,Agricultural College and Research Institute |
Sankaranarayanan R.,Horticultural College and Research Institute
Journal of Chemical and Pharmaceutical Research | Year: 2013
Saraca indica auct, non Linn commonly called as "Ashoka" is a vulnerable species, becoming rarer in its natural habitat. Callus culture was initiated from leaf, stem and flower bud explants of Saraca indica using Murashige and Skoog (1962) basal medium containing 3% sucrose and 0.8% agar supplemented with different concentrations (2, 3, 4 and 5 mgL-1) of 2,4-Dichlorophenoxy acetic acid (2,4-D). Leaf and stem explants produced 100 percent callusing in all the concentrations tried, whereas poor callusing response was observed with flower bud explant. Leaf explant was chosen for a detailed callus induction study with different concentrations and combinations of auxins 2,4-D and naphthalene acetic acid (NAA). Among the different treatments, leaf explant showed optimum callusing in cultures supplemented with 3 mgL-1 of 2,4-D alone. Treatments with NAA alone showed very poor callusing response. When combinations of 2,4-D (3 to 5 mgL-1) and NAA (3 to 5 mgL-1) were used, root formation was induced along with callusing. The fresh calli produced in all the treatments were white and hard which turned brown after two weeks.
Punithavalli M.,Sugarcane Breeding Institute |
Muthukrishnan N.M.,Agricultural College and Research Institute |
Rajkuma M.B.,Central Institute of Subtropical Horticulture
Rice Science | Year: 2013
The experiment was carried out to assess the reaction of different categories of rice genotypes viz., resistant, susceptible, hybrid, scented, popular and wild in response to the infestation by rice leaffolder (RLF), Cnaphalocrocis medinalis (Guenee) and to explore the possible use of these genotypes in developing RLF-resistant rice varieties. The changes of various biochemical constituents such as leaf soluble protein, phenol, ortho-dihydroxy phenol, tannin and enzymes viz., peroxidase, phenyl alanine ammonia lyase (PAL) were assessed spectrophotometrically in all the rice genotypes before and after RLF infestation. The protein profile was analyzed using sodium dodecyl sulphate-poly acrylamide gel electrophoresis (SDS-PAGE) method. A significant constituent of biochemical content such as tannin, phenol and ortho-dihydroxy phenol has been increased along with enzyme activities of peroxidase and PAL in the infested resistant (Ptb 33, TKM6 and LFR831311) and wild rice genotypes ( Oryza minuta and O. rhizomatis). A decrease in leaf protein content was evident invariably in all the infested rice genotypes. It is also evident that the contents of biochemicals such as phenol, ortho-dihydroxy phenol and tannin were negatively correlated with leaffolder damage. However, leaf protein content was positively correlated with the damage by rice leaffolder. SDS-PAGE analysis for total protein profiling of healthy and C. medinalis-infested genotypes revealed the enhanced expression of a high molecular weight (> 97 kDa) protein in all the genotypes. Besides, there was also an increased induction of a 38 kDa protein in C. medinalis infested resistant genotypes, which was absent in uninfested plants. The present investigation proved that the elevated levels of biochemicals and enzymes may play a vital role in rice plants resistance to RLF. © 2013 China National Rice Research Institute.
Chinniah C.,Agricultural College and Research Institute
Pestology | Year: 2013
A field study on evaluation of certain new acaricide/insecticide molecules for their efficacy to suppress the two spotted spider mite Tetranychus urticae Koch, on brinjal revealed that among the selected new molecules tested the following chemicals viz., Spiromesifen 240 SC @ 0.7 ml/lit, Abamectin 1.8 EC @ 0.5 ml/lit, Propargite 57 EC @ 3 ml/lit and Fenpyroximate 5 EC @ 0.8 ml/lit were found to be very effective in controlling the mite population (more than 75% reduction over untreated control) and they were statistically on par in terms of bioefficacy, fruit yield and cost benefit ratio. However the standard check Dicofol 18.5 EC @ 4 ml/lit was the best in reducing the mite population and in % yield increase.
Savitha P.,Agricultural College and Research Institute |
Usha Kumari R.,Agricultural College and Research Institute
Indian Journal of Traditional Knowledge | Year: 2016
Rice (Oryza sativa L.) is one of the important food crop and main source of nourishment for more than one half of the world population. Medicinal landraces like Navara is highly nutritive and are rich in minerals like potassium, sodium, calcium, micronutrients, viz. iron and zinc. The present investigation was carried out in the Department of Plant Breeding and Genetics at Agricultural College and Research Institute, Madurai during 2012–2014. High yielding released variety of Tamil Nadu used for standard check ADT 43 along with four different medicinal landraces of rice collected from different areas of Kerala and Tamil Nadu, viz. Navara, Kavuni, Veeradangan and Kathanellu were used. By improving the strain of these traditional medicinal rice varieties, scientists hope to make it stronger to withstand the onslaught of climate and ensure higher output. © 2016, National Institute of Science Communication and Information Resources (NISCAIR). All rights reserved.
Sivasubramaniam K.,Agricultural College and Research Institute |
Selvarani K.,Agricultural College and Research Institute
Revista Brasileira de Botanica | Year: 2012
(Viability and vigor of jamun (Syzygium cumini) seeds). Jamun (Syzygium cumini L. Skeels) (Black plum, Damson plum) fruits weigh between 2-5 g at maturity. Fresh seeds represented 20-80% of the total fruit weight; the seed coat and cotyledons contributed 6% and 94% to the total seed weight respectively, while the weight of the embryonic axis was insignificant. Only the embryonic axis stained with Tetrazolium, not the cotyledons. The seeds are polyembryonic with up to four embryos, of which at most three germinate. Decoated seeds germinated faster than coated seeds under nursery conditions, with high significant germination percentages, dry matter production rates and vigor indices. The lack of staining of the cotyledon by tetrazolium was probably due to the presence of an impermeable layer. Decoating seeds for faster germination is recommended.
Mahalakshmi P.,Agricultural College and Research Institute |
Raja I.Y.,Agricultural College and Research Institute
Journal of Biopesticides | Year: 2013
A study was carried out to test the antagonistic potential of four isolates of Trichoderma viride and eight isolates of T. harzianum and five isolates of T. reesei against F. oxysporum f. sp. dianthi, the cause of Fusarium wilt in carnation. T. harzianum (Th2) showed the maximum inhibition of mycelial growth of F. oxysporum f. sp. dianthi. (45.33%) over control followed by T. harzianum (Th6) and T. viride (Tv3) with 42.11 and 38.66 per cent inhibition respectively. The Competitive Saprophytic Ability (CSA) and colonization by each isolates of Trichoderma spp. was assessed. Among the 17 isolates, Th2 registered 61.84 per cent colonization followed by Th6 with 59.12 per cent colonization. All other isolates of Trichoderma spp. were inferior to Th2 in its saprophytic ability. The antagonistic isolates of Trichoderma spp. were also tested for production of antifungal volatiles and their effect on the growth of F. oxysporum f. sp. dianthi. All the isolates were found to produce volatile metabolites, which inhibited the mycelial growth of test pathogen at varing levels from 16.33 to 50.11 per cent. © JBiopest 365.
Arunachalam R.,Agricultural College and Research Institute
Legume Research | Year: 2011
A study was conducted in green gram and black gram in the selected blocks of Madurai district with the main objectives to study the extent of adoption of recommended pulse production technologies (Rice fallow and Pure crop) and also to study the constraints in the adoption of the recommended technologies. The pure crop respondents (Black gram) have fairly adopted the technologies viz., right time of sowing, optimum seed rate, recommended fertilizer, regular weeding, control of pod borer and powdery mildew and harvesting at the right time. In the practices viz., seed treatment, DAP spray at flowering, trimming and plastering of field bunds, control of sucking pests and storing the harvested produce in the polythene lined gunny bag they are not up to the expectation. At the same time, rice fallow respondents have poorly adopted almost all the recommended technologies. Almost similar trend prevailed in the green gram also The most felt were biological constraints and socio economic constraints, followed by technological and infrastructural constraints.