Vol.12, No. 1, 2004
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ItemEffect of Methyl Bromide and Hydrogen Phosphide Fumigants on Quality and Storability of Sudanese Dry Dates(Faculty of Agriculture, University of Khartoum, Shambat, Sudan, 2004)The effect of fumigation on quality and storability of 'Barakawi' and 'Gondeila' dates was evaluated at ambient conditions, using methyl bromide and hydrogen phosphide (Phostoxin). Fumigation kept the dates completely free from insect infestation for the first four to six months, and suppressed it significantly for the remaining storage period. Methyl bromide was more effective than Phostoxin. Insect infestation was decreased after 12 months of storage by 67.8% and 69.9% with methyl bromide and by 48.6% and 57.4% with Phostoxin in 'Barakawi' and 'Gondeila' dates, respectively, compared to untreated dates. Sugars, proteins and phenolics contents progressively decreased during storage of both cultivars, especially towards the end of the storage period. The reductions in these constituents were significantly less in the fumigated dates than in the controls.
ItemPerformance, Interrelationship and Path Analysis of Some Yield Component in Sesame(Faculty of Agriculture, University of Khartoum, Shambat, Sudan, 2004)Twenty genotypes of sesame were evaluated at the Gezira University Farm, Wad Medani, Sudan, for two consecutive rainy seasons (1999 and 2000) in a randomized complete block design with four replicates. The objectives were to estimate the genotypic and phenotypic variability, heritability in broad sense, genotypic and phenotypic correlation coefficients and path coefficient analysis for 12 characters the highest genotypic of variation and genetic advance were recorded for height to first branch and height to first capsule in both seasons, and the lowest for number of capsules/ plant in the second season. High heritability estimates (>80%) in both seasons were recorded for days to 50% flowering, days to maturity and 100-seed weight. High heritability estimate, combined with high genetic advance, was given by height to first capsule in the first season. The highest yielding genotypes were Pach, Um Shagara, Promo, Khidir and Karam. Their seed yield varied from 1511 to 1678 kh/ha, Seed yield/ha showed significant positive genotypic correlation coefficients with seed yield/ plant and 1000- seed weight. The multiple coefficient of determination and path coefficient analysis indicated that the seed yield/ plant, 1000-seed weight and number of capsules/ plant were the most important characteristics related to seed yield/ ha. The greatest direct effect on seed yield/ ha was exerted by seed yield/ plant.