ABSTRACT
Twenty one crosses of groundnut derived from 7×7 diallel set without reciprocals were evaluated during rabi 2010-11 for variability, heritability and genetic advance. Analysis of variance for thirteen traits revealed highly significant differences among the F2 populations tested. The estimates of GCV and PCV were high for number of secondary branches per plant, kernel yield per Plant (g), total phenols content (mg/g), pod yield per plant (g), number of kernels per plant and harvest index. High heritability coupled with high genetic advance as percent of mean for traits viz., days to 50% flowering, total phenols, number of secondary branches per plant, harvest index, kernel yield per plant and number of kernels per plant indicate that these are predominantly influenced by additive gene action and the possibility of phenotypic selection in early generations. High heritability coupled with moderate genetic advance as percent of mean for number of primary branches per plant and moderate heritability coupled with moderate genetic advance as per cent of mean for 100-kernel weight indicate the role of both additive and non additive gene action with preponderance of additive genetic variance and selection would be effective to some extent.
ABSTRACT
Adsorption of atrazine was studied on two Vertisols and two Alfisols varying in their physicochemical properties. Soils were equilibrated with various concentrations of atrazine using batch techniques. Adsorption affinity for atrazine was approximated by Freundlich constant (Kf), which is a measure of the strength or degree of adsorption. Kd values were calculated for atrazine despite some non-linearity in adsorption on both Vertisols and Alfisols. The Kd values are greater for Vertisols than Alfisols and increased with organic carbon content. Correlations were worked out between extent of adsorption and soil properties and were positively correlated with organic carbon (r = 0.688), clay content ( r = 0.712) and clay + organic carbon (r = 0.708). KOC values were calculated taking into account the organic carbon content for both Vertisols and Alfisols.
ABSTRACT
Crossandra is an important flower plant of our country earning a lot of revenue and trade. Of different diseases affecting crossandra cultivation, collar rot induced by Sclerotium rolfsii Sacc. is an important soil borne disease causing devastating losses. In the present study, the sensitivity of the collar rot pathogen was investigated. Also the compatibility of fungal biocontrol agent, Trichoderma spp. with these fungicides was worked out to for further devising Integrated Management strategies for collar rot disease. Four fungicides, viz., captan 50% WP, propiconazole 25% EC, thiophanate-methyl 70% WP and thiram 75% SD were evaluated at five different concentrations against collar rot pathogen, S. rolfsii. Further, the compatibility of these fungicides and the antagonist Trichoderma isolate-1 (T1). Results indicated that the fungicides, propiconazole, thiram and captan have significantly reduced the mycelial growth of test pathogen over control. Maximum inhibition was with propiconazole (100%), followed by thiram (81%) and captan (78%). Results on compatibility of Trichoderma spp. with these fungicides revealed that the bioagent was highly compatible with thiram (32% growth inhibition), followed by captan (47.5%). However, the Trichoderma isolate is not compatible with thiophanate methyl (88% growth inhibition) and propiconazole (100% growth inhibition). The Trichoderma isolate-1 (T1) and the fungicide, thiram were selected for further studies to devise integrated management strategies against collar rot disease.
ABSTRACT
Six promising sugarcane varieties were evaluated along with one check variety for yield and quality of jaggery suitable for southern zone of Andhra Pradesh. Among the varieties 97R272, 86V96 and 93A145 are classified as excellent jaggery varieties along with check Co 62175 which is known for better jaggery variety in the zone. All the quality parameters viz., sucrose %, color, reducing sugars, non reducing sugars and NRV were determined and classified the varieties. 97R272, 86V96 and 93A145 can be recommended for cultivation in jaggery area of Southern zone of Andhra Pradesh.
ABSTRACT
A simple, sensitive and precise high performance liquid chromatographic method for the analysis of Pantoprazole sodium and lansoprazole has been developed, validated and used for the determination of compounds in commercial pharmaceutical products. The compounds were well separated an isocratically on a C18 column [Use Inertsil C18, 5m , 150 mm x 4.6 mm] utilizing a mobile phase consisting of acetonitrile: phosphate buffer (60:40, v/v, pH 7.0) at a flow rate of 1.0 ml/min with UV detection at 230 nm. The retention time of Pantoprazole sodium and lansoprazole was found to be 2.017 min and 2.538. The procedure was validated for linearity (Correlation coefficient = 0.999). The study showed that reversed-phase liquid chromatography is sensitive and selective for the determination of Pantoprazole sodium and lansoprazole using single mobile phase.
ABSTRACT
A simple, selective, accurate reverse phase-high Performance Liquid Chromatographic (RP-HPLC) method was developed and validated for the analysis of Sildenafil Citrate in pharmaceutical formulations. Chromatographic separation achieved isocratically on a C18 column [Use Inertsil C18, 5m , 150 mm x 4.6 mm] utilizing a mobile phase of acetonitrile/phosphate buffer (70:30, v/v, pH 7.0) at a flow rate of 0.8 ml/m with UV detection at 228 nm. The retention time was 4.087. The method is accurate (99.15-101.85%), precise (intraday variation 0.13-1.56% and inter-day variation 0.30-1.60%) and linear within range 0.1- 30μg/ml (R2=0.999) concentration and was successfully used in monitoring left over drug. The detection limit of sildenafil citrate at a signal-to-noise ratio of 3 was 1.70ng/ml in formulations while quantification limit in drug was 5.40 ng/ml. The proposed method is applicable to stability studies and routine analysis of sildenafil citrate in pharmaceutical formulations.