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Mukri G.,University of Agricultural Sciences, Dharwad | Biradar B.D.,Regional Agricultural Research Station | Sajjanar G.M.,Regional Agricultural Research Station
Indian Journal of Ecology | Year: 2014

The experimental material consisted of 35 elite sorghum genotype including hybrid parents (restorer and maintainer) hybrids and varieties. The experimental material was evaluated over six different dates of sowing ranging from 20 th September to 27th October. The influence of dates of sowing on different phenotypic characters indicated that delayed sowing reduced the expression of all the traits. Flowering was early when genotypes were sown at 5th October. The grain yield in general was high in the genotype sown at 20-28th September compared to the remaining dates. The seed set percentage (irrespective of sowing dates) was more than 65 per cent as long as minimum temperature was more than 13°C, whereas, it was drastically reduced when minimum temperature was dropped down below 10°C. Mean performance of genotypes for the seed set percentage, test weight, grain number per panicle was lowest In the B lines compared to R lines. This suggests that there is need to improve the existing B lines for these traits. The genotypes AKMS14B, 101B, 296B, 116B and BJMS2B showed narrow range of mean grain yield per plant compared to the highest range recorded by CSH-19R across sowing dates and temperature regimes. These results revealed that the above genotypes could be used further for the development of new breeding lines, which are less sensitive to sowing dates and temperature regimes in rabi season.

Meriga B.,Sri Venkateswara University | Mopuri R.,Sri Venkateswara University | MuraliKrishna T.,Regional Agricultural Research Station
Asian Pacific Journal of Tropical Medicine | Year: 2012

Objective: To evaluate the insecticidal, antimicrobial and antioxidant activities of bulb extracts of Allium sativum (A. sativum). Methods: Dried bulbs of A. sativum were extracted with different solvents and evaluated for insecticidal, antimicrobial and antioxidant activities. Methods: Aqueous and methanol extracts showed highest insecticidal activity (mortality rate of 81% and 64% respectively) against the larvae of Spodoptera litura (S. litura) at a concentration of 1 000 ppm. With regard to antimicrobial activity, aqueous extract exhibited antibacterial activity against gram positive (Bacillus subtilis, Staphylococcus aureu,) and gram negative (Escherichia coli and Klebsiella pneumonia) strains and antifungal activity against Candida albicans. While methanol extract showed antimicrobial activity against all the tested micro organisms except two (Staphylococcus aureus and Candida albicans), the extracts of hexane, chloroform and ethyl acetate did not show any anti microbial activity. Minimum inhibitory concentration of aqueous and methanol extracts against tested bacterial and fungal strains was 100-150 μg/mL. Antioxidant activity of the bulb extracts was evaluated in terms of inhibition of free radicals by 2, 2'-diphenly-1-picrylhydrazyl. Aqueous and methanol extracts exhibited strong antioxidant activity (80%-90% of the standard). Conclusions: Antioxidant and antimicrobial activity of A. sativum against the tested organisms therefore, provides scientific basis for its utilization in traditional and folk medicine. Also, our results demonstrated the insecticidal efficacy of A. sativum against S. litura, a polyphagous insect. © 2012 Hainan Medical College.

Rao I.V.Y.R.,Regional Agricultural Research Station
International Sugar Journal | Year: 2012

The present study attempts to reveal the paradox faced by sugar factories in Andhra Pradesh receiving reduced cane supply following an increase in payment to growers for their cane in the previous year. The secondary data collected for the period 1990-91 to 2009-10 were on variables like jaggery prices, sugarcane prices, sugar prices, sugarcane crushed and sugarcane acreage for factories under study. Cobb-Douglas type of production function, Multiple Linear Regression (MLR) and Marginal Value of Productivity (MVP) were employed. The paradoxical situation arises for the following reason. An increase in price by 1% to cane growers by sugar factories results in expansion in acreage for cane for sugar production in mills. This in turn results in the reduction of acreage from which cane will be diverted to jaggery production. Since this would trigger an increase in jaggery prices by 1.69%, more cane will be diverted for this purpose. The consequence being reduced cane supply to mills. Effectively, changes in jaggery prices have greater impact than cane prices. The central assumption here is that the demand for jaggery is price inelastic.

Sreekanth M.,Regional Agricultural Research Station | Seshamahalakshmi M.,Regional Agricultural Research Station
Journal of Biopesticides | Year: 2012

An experiment conducted during Kharif, 2010 to evaluate the efficacy of different biopesticides against gram pod borer Helicoverpa armigera (Hubner) and legume pod borer, Maruca vitrata (Geyer) on pigeon pea revealed that there is no significant difference between the treatments against pod damage due to gram pod borer, H. armigera since the population and thereby pod damage was very low during the season. The untreated check has recorded only 1.63% pod damage due to Helicoverpa. The per cent inflorescence damage due to legume pod borer was lowest in spinosad 45% SC @ 73 g a.i/ha (4.74%), followed by Bacillus thuringiensis-1 @ 1.5 kg/ha (10.52%) and Beauveria bassiana SC formulation @ 300mg/Lt (14.15%) with 80.9, 57.6 and 42.9 per cent reduction over control respectively as against control (24.79%). The pod damage due to Maruca was the lowest in spinosad (17.38%), followed by Bt.-1 (27.57%) and B. bassiana SC formulation @ 300 mg/lt (33.82%) as against control (45.84%) with 62.1, 39.9 and 26.2 per cent reduction over control respectively. The highest grain yield was recorded in spinosad 45% SC @ 73 g.i/ha treated plots (831.0 kg/ha), followed by Bt.1 @ 1.5 kg/ha (743.1 kg/ha) and B. bassiana SC formulation @ 300mg/Lt (694.4 kg/ha) with 104.0, 82.4 and 70.5 per cent increase over control respectively as against the minimum yield of 407.4 kg/ha in the untreated check. ©JBiopest.

Sandhya Rani B.,Regional Agricultural Research Station | Giridhara Krishna T.,Regional Agricultural Research Station
Indian Journal of Agricultural Research | Year: 2016

An experiment was conducted during rabi season of 2010-12 to study the response of chickpea varieties to nutrients levels on a calcareous vertisols. The experiment comprised of four varieties i.e., NBeG-3, NBeG-28, JG-11 and KAK-2 and with four nitrogen levels i.e., 0, 20, 30 and 40 kg/ha laid out in factorial randomized block design with three replications. Among the varieties significantly higher dry matter production at harvest was recorded with JG-11 while it was lowest with KAK-2. More number of pods per plant and seed yield were recorded with JG-11 followed by NBeG-3 and NBeG-28, while lowest with KAK-2. Interaction effect among the different varieties and nitrogen levels was non significant with yield attributes. Significantly higher seed yield was recorded with JG-11 @ 40 kg of N/ha but was at par with N @ 20 and 30 kg /ha, followed by NBeG-3 and NBeG-28.

Thirumala Rao V.,Regional Agricultural Research Station
Legume Research | Year: 2016

Groundnut yield in rain fed areas has been limited by drought stress because pod yield and other growth parameters have been severely affected. The aim of this study is to evaluate the genetic variability, character association and path analysis between yield and its contributing traits in 30 groundnut genotypes under drought. Analysis of variance revealed the existence of significant differences among genotypes for all characters studied. The magnitude of PCV and GCV was moderate to high for number of pods per plant, dry haulm yield, kernel yield, plant height and dry pod yield. High heritability coupled with high genetic advance as per cent of mean was observed for kernel yield, plant height, dry pod yield, and hundred kernel weight indicating the role of additive gene in expressing these traits. Dry pod yield was significant positively correlated with kernel yield, no of pods per plant, hundred kernel weight and SPAD chlorophyll meter reading (SCMR). Path coefficient analysis indicated that number of pods per plant and hundred kernel weight were essential traits to be considered for realizing the improvement in yield. © 2016, Agricultural Research Communication Centre. All rights reserved.

Waghmode B.D.,Regional Agricultural Research Station | Mehta H.D.,Navsari Agricultural University
Indian Journal of Genetics and Plant Breeding | Year: 2011

The availability of stable cytoplasmic male sterility and fertility restoring system is vital for commercial exploitation of heterosis in rice. Inheritance study using four effective fertility restorers (BL-184-AR, IR-54742-22- 19-3, NVSR-20 and Pusa Sugandha-5) and five diverse cytosterile sources (KJTCMS-6A-WA, RTN 2A-ARC, RTN 3A-Mutant of IR 62829B, RTN 13A-Gambiaca and RTN 17ADissi), their F 1, F 2 and BC 1 populations revealed that the fertility restoration was governed by two independent genes, one of which appeared to be stronger in action than other. Crosses KJTCMS-6A X IR-54742-22-19-3, RTN- 2A X BL-184-AR and RTN-2A X NVSR-20, RTN-3A X BL- 184-AR and RTN-13A X NVSR-20, showed segregating ratio of 12 (fertile) : 3 (partially fertile + partially sterile): 1 (completely sterile plants) and 2 (fertile) : 1 (partial sterile/ fertile) : 1 (sterile) in F 2 and BC 1 generations respectively, for pollen and spikelet fertility indicating two major genes with dominant epistasis. In case of crosses KJTCMS-6A X BL-184-AR and KJTCMS-6A X NVSR-20, RTN-13A X BL-184-AR, RTN-17A X BL-184-AR segregated in the ratio of 9:6:1 and 1:2:1 in F 2 and BC 1 generations respectively, for pollen and spikelet fertility indicating two major genes with epistasis and incomplete dominance. While crosses, KJTCMS-6A X Pusa Sugandha-5, RTN-2A X IR-54742-22-19-3 and RTN-2A X Pusa Sugandha-5, RTN-3A X IR-54742- 22-19-3, RTN-3A X Pusa Sugandha-5 and RTN-3A X NVSR- 20, RTN-13A X IR-54742-22-19-3, RTN-13A X Pusa Sugandha-5 and RTN-17A X IR-54742-22-19-3, RTN-17A X Pusa Sugandha-5, RTN-17A X NVSR-20, exhibited the restoration pattern fitted well in a segregation ratio of 9:3:4 and 1:1:2 in F 2 and BC 1 generations respectively, for pollen and spikelet fertility displaying an epistasis with recessive interaction. The mode of action of these genes were different in different restorer combinations with five different sources of cytoplasmic genetic male sterility. Change in fertility restoration by same restorer with CMS line of same source and of different source could either due to cytoplasmic genetic interactions of CMS line and fertility restoring genes or may be affected by modifier genes.

Bhavani B.,Regional Agricultural Research Station
International Sugar Journal | Year: 2013

The scale insect, Melanaspis glomerata Green is a major pest on sugarcane affecting both productivity of cane and quality of juice. In a field experiment with cane cv. 93 A 145 at the Regional Agricultural Research Station, Anakapalle, Andhra Pradesh, India, revealed that among the treatments, sett treatment with acephate 75 SP @1g/ lt for 15 minutes before planting + spraying acephate 75 SP @1g/lt twice at 30 days interval after detrashing the lowest 4 or 5 leaves just before the initial appearance of the pest was highly effective in reducing the incidence of scale insect (4.62%) as well as scale incrustation (126mg/cane) compared to untreated control (40.95%; 1190 mg/cane) and produced the highest cane yield (90.62 t/ha), percent sucrose (19.39%) and purity of juice (90.23%) as against untreated control (77.70 t/ha, 17.49% and 82.41%). This treatment was statistically equivalent with sett treatment with acetamiprid 20SP @ 0.2g/lt + spray of acetamiprid 20 SP @ 0.2 g/lt (5.24%; 131mg/cane) and also sett treatment with imidacloprid 200SL@ 0.25ml/lt + spray of imidacloprid 200 SL @ 0.25ml/lt (6.39%; 138 mg/cane) in reducing the incidence of scale insect as well as scale incrustation over control, respectively.

Bhushan A.,Regional Agricultural Research Station | Gupta R.K.,Regional Agricultural Research Station
Indian Journal of Horticulture | Year: 2010

A protocol has been standardized for adventitious shoot regeneration from different explants without intervening callus formation in six genotypes of tomato. Maximum shoot bud formation was obtained on a medium supplemented with 2.0mgl-1 BAP. Tomato hybrid TH802 has the highest organogenetic potential as compared to other genotypes. Sub culturing of shoots buds on the same medium led to continuous production of multiple shoots. Regenerated shoots were rooted on hormone free MS basal medium. Plantlets were transferred to the field after hardening in the pots containing sand, soil and farmyard manure (1:1:1) in a green house. The regenerated plants were identical to the in vivo raised plants in agro biological features.

Neog M.,Regional Agricultural Research Station | Saikia L.,Assam Agricultural University
Journal of Food Science and Technology | Year: 2010

Pericarp browning is the major post-harvest problem of litchi (Litchi chinensis Sonn) fruit, resulting in reduced commercial value of the fruit. Control of postharvest pericarp browning of fruit using 9 different postharvest treatments were studied. The treated fruits were packed in transparent perforated (0.2% ventilation) low density polythene bags (100 gauge). On storage, pericarp browning increased irrespective of treatments with the decrease in pericarp specific activity, total pericarp phenol and total anthocyanin. Anthocyanin degradation index and polymeric colour increased during storage. Pre-cooled (100C) fruits treated with 0.6% sodium metabisulphite solution for 10 min, air dried followed by dipping in 2% HCl for 5 min and packing in perforated LDPE bags recorded the lowest polyphenol oxidase specific activity (2.2 units/mg protein) with maximum retention of total anthocyanin (47.3 mg/100g) leading to the lowest pericarp browning after 9 days of storage with attractive red colour, freshness and enhanced shelf life of 9 days at ambient conditions (27.7 ± 1.2°C, RH 78 ± 4%). © Association of Food Scientists and Technologists (India), Mysore.

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