الفهرس 
Varietal resistance to beet Powdery mildewOnly 14 pages are availabe for public view
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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).