الفهرس | Only 14 pages are availabe for public view |
Abstract Sugar beet (Beta vulgaris var. saccharifera, L.) is an economically important crop grown world wide for sugar production. Powdery mildew disease, caused by Erysiphe betae, is one of the most important vegetative affects diseases in Egypt. This study was conducted as an attempt to control Powdery mildew disease on sugar beet using resistant varieties, in addition to using chemical inducers and or nanoparticles as an alternative method to the use of fungicides. The present study data classified three groups Based on the disease severity (DS%) at 105 days, sugar beet varieties, the resistant varieties were Dreeman ,Puma ,Ribera , Lilly, Toro and Oscar poly, while Cv. Hercules highly susceptible . The highest root yield variety Derman (10.83Kg/plot). Among sugar beet varieties, Heba attained the maximum TSS (19.66 %), The highest sucrose concentration (17.46 %) was observed in Heba variety, varieties with high sucrose purity (Oscar poly, Heba, Lilly, Aminavhe and Ribera). Chl.a variety Dreeman, Carnute and Ribera gave the highest concentration in the same time Chl.b varieties Puma, Dreeman, Oscar poly and Ribera. Chl.a +b all varieties Sugar beet varieties Dreeman, Carnute, Oscar poly and Ribera were the highly concentration carotene concentration was highest concentration were recorded in varieties Dreeman. Fungicide and ascorbic acid were the only efficient treatments for reducing PMD at 60 dpi. Results indicated that the highest root yield was achieved by Salicylic acid,(10.63 Kg/plot) . zinc sulfate attained the maximum TSS (21.0 %), while Max growth had the lowest TSS, Eminent fungicide recorded the highest sucrose, high sucrose purity ascorbic acid and salicylic acid. Chl.a, Fungicide Eminent gave the highest concentration, Chl.b The highest concentration were recorded chemicals Max growth, Ascorbic acid, Salicylic acid and Zinc oxide, Chl.a +b all chemical inducers significantly in theses respect. The highest concentration of carotene were recorded chemicals Max growth. The most effective treatments were Nanoparticles copper oxide con.30ppm and Nanoparticles copper oxide con.20ppm that reduced PMD by 15.24 and 15.70 %, respectively compared with control. the highest root yield was achieved by Nanoparticles zinc oxide con. 30ppm ,(9.96 Kg/plot) Among Nanoparticles, Nano zinc oxide con.20ppm attained the maximum TSS (21.0 %). All Nanoparticles con. recorded the highest sucrose concentration, Nanoparticles with high sucrose purity (Nano copper oxide con.10ppm and Nano zinc oxide con. 20ppm) with, 88.49 and 88.47 %, respectively Chl.a all nanoparticles significantly in thesis respect. In general Nano zinc oxide conct, 10ppm gave the highest concentration (2.39). Chl b concentration was significantly increased due to nanoparticles . The highest concentration were recorded Nano copper oxide at conent. 20ppm. Chl.a +b all Nanoparticles significantly in theses respect. Nano zinc oxide at concent. 10ppm was highly concentration (3.18). carotene concentration was significantly increased due to nanoparticles . The highest concentration was recorded Nano silica oxide at concent.30ppm (0.77). |