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Abd-El-Khair H.,National Research Center of Egypt | Abd-El-Fattah A.I.,Sugar Crops Research Institute | El-Nagdi W.M.A.,National Research Center of Egypt
Archives of Phytopathology and Plant Protection | Year: 2013

Survey results during 2010-2011 season revealed that the Meloidogyne spp., Helico-tylenchus spp. and Tylenchorhynchus spp. were the common plant parasitic nematodes in the rhizospheres of sugar beet in El-Behera, El-Fayoum and Beni Sueif Governorates. Aspergillus spp., Aspergillus niger, Fusarium spp., Penicillium spp., Penicillium chrysogenum, Penicillium citrinum, Rhizoctonia spp., Rhizopus nigricans, Trichoderma spp. and others were also the common fungi in the same rhizospheres. The rhizosphere of El-Behera Governorate was highly infected with Meloidogyne spp., Fusarium spp. and Rhizoctonia spp., compared to the rhizospheres of El-Fayoum and Beni Sueif, respectively. Evaluation of five of sugar beet cultivars, viz. Chems, Dema-Poly, DS 9001, Manila and Ras-Poly to infection, with Meloidogyne incognita (root-knot nematode), Fusarium solani and Rhizoctonia solani (root rot disease) was carried out under naturally field infection condition in the Nubariya region, Behera Governorate during 2011-2012 season. Host susceptibility rating revealed that the varieties of Ras-Poly, DS 9001 and Manila can be considered as susceptible, while the varieties of Dema-Poly and Chems can be considered as highly susceptible. Pathological results showed that the varieties of Dema-Poly and Ras-Poly were highly infected with F. solani, while not infected with R. solani. The varieties of DS 9001, Manila and Chems were moderately infected with the two pathogens. © 2013 Taylor & Francis.

Abd El-Lattief E.A.,South Valley University | Bekheet M.A.,Sugar Crops Research Institute
Sugar Tech | Year: 2012

Two field experiments were performed during 2010/2011 and 2011/2012 seasons to evaluate the effects of seven growth regulators treatments (IAA 100 ppm, IAA 200 ppm, IAA 300 ppm, GA 3 100 ppm, GA 3 200 ppm, GA 3 300 ppm and control) on quantitative and qualitative attributes of three sugarcane varieties (Phil. 8013, G. 98-28 and G. T. 54-9). Such trials were carried out at Shandaweel Agricultural Research Station, Sohag, Egypt using a randomized complete block in split plot design with four replicates. Sugarcane varieties and growth regulators treatments were randomly distributed in the main and split plots, respectively. Results revealed that commercial variety G. T. 54-9 gave the highest values of stalk thickness, number of valid stalks per ha, stalk yield, brix value, pol %, sugar % cane and sugar yield per ha. Among the seven growth regulators treatments, GA 3 at 300 ppm gave the highest values of above mentioned traits and stalk height. On the other hand, juice purity was unaffected by varieties or growth regulators treatments. The interaction effect of variety × plant growth regulators was not significant for all measured traits. Correlation coefficient values of different yield and quality characters with sugar yield were positive and highly significant. The highest values of correlation coefficients with sugar yield were exhibited from sugar % cane (r = 0.931), pol % (r = 0.829) and stalk cane yield (r = 0.636). © 2012 Society for Sugar Research & Promotion.

Todd J.,U.S. Department of Agriculture | Wang J.,University of Florida | Glaz B.,U.S. Department of Agriculture | Sood S.,U.S. Department of Agriculture | And 7 more authors.
Genetic Resources and Crop Evolution | Year: 2014

The Saccharum L. genus includes important crops that are utilized for sugar and fuel production. The World Collection of Sugarcane and Related Grasses (World Collection) in Miami, FL contains diverse and potentially useful germplasm for this and related genera; however, this collection has been underutilized because little is known about the traits of its accessions. Our objectives were to phenotypically characterize the World Collection and select a representative core collection that could then be studied intensively. In total, eight morphological traits of the World Collection were evaluated three times in 1 year. A core of 300 accessions that included each species in the World Collection was selected by using the Maximization Strategy in MStrat software. The core had a higher diversity rating than random selections of 300 accessions. The Shannon–Weaver Diversity Index scores of the core and whole collection were similar indicating that the majority of the diversity was captured by the core collection. The ranges and medians between the core and World Collection were similar; only two of the trait medians were not significant at P = 0.05 using the non-parametric Wilcoxon method and the coincidence rate (CR % = 96.2) was high (>80) indicating that extreme values were retained. Thus, the phenotypic diversity of these traits in the World Collection was well represented by the core collection. Agronomic studies on the core should be useful for characterizing the World Collection and genes for useful traits should be available in the core collection. © 2014, Springer Science+Business Media Dordrecht (outside the USA).

Khattab S.N.,Alexandria University | Massoud M.I.,Sugar Crops Research Institute | Jad Y.E.-S.,Alexandria University | Bekhit A.A.,Alexandria University | And 3 more authors.
Food Chemistry | Year: 2014

New stevia amino acid sweeteners, stevia glycine ethyl ester (ST-GL) and stevia l-alanine methyl ester (ST-GL), were synthesised and characterised by IR, NMR (1H NMR and 13C NMR) and elemental analysis. The purity of the new sweeteners was determined by HPLC and their sensory properties were evaluated relative to sucrose in an aqueous system. Furthermore, the stevia derivatives (ST-GL and ST-AL) were evaluated for their acute toxicity, melting point, solubility and heat stability. The novel sweeteners were stable in acidic, neutral or basic aqueous solutions maintained at 100 °C for 2 h. The sweetness intensity rate of the novel sweeteners was higher than sucrose. Stevia amino acid (ST-GL and ST-AL) solutions had a clean sweetness taste without bitterness when compared to stevioside. The novel sweeteners can be utilised as non-caloric sweeteners in the production of low-calorie food. © 2014 Elsevier Ltd. All rights reserved.

El-Gizawy E.,Water and Environmental Research Institute | Shalaby G.,Sugar Crops Research Institute | Mahmoud E.,Tanta University
Communications in Soil Science and Plant Analysis | Year: 2014

A field experiment was carried out during two successive seasons of 2009-2010 and 2010-2011 at Sakha Agriculture Reseach Station, Egypt, to study the effects of different applications of compost tea (C) under three mineral nitrogen (N) levels and their interaction effects on sugar yield and juice quality characteristics of sugar beet (Beta vulgaris L.), and soil available nutrients. Results indicated that the sugar yield and juice quality characteristics of sugar beet were significantly increased with compost tea treatments, especially in the plots treated with compost tea foliar application in three batches. A quality percentage of sugar beet was increased about 8.0% in the plots treated with compost tea or interaction between N mineral N and compost tea treatments above the control treatment. The interaction between mineral N and compost tea treatments had a significant effect on sugar yield, sugar percentage, purity, and quality of sugar beet and soil fertility. © Taylor & Francis Group, LLC.

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