Effect of Planting Dates on the Productivity, Quality and Stemphylium Leaf Blight disease of Some Onion Cultivars Under Nubaria Conditions
A., G., Yaso, I., Kandil, E., Heflish, A., Abd El- Gawad, M. (2021). Effect of Planting Dates on the Productivity, Quality and Stemphylium Leaf Blight disease of Some Onion Cultivars Under Nubaria Conditions. EKB Journal Management System, 12(1), 9-19. doi: 10.21608/eajbsh.2021.134943
Gomaa M. A.; I. A. Yaso; Essam E. Kandil; Ahmed I. A. Heflish; M. S. Abd El- Gawad. "Effect of Planting Dates on the Productivity, Quality and Stemphylium Leaf Blight disease of Some Onion Cultivars Under Nubaria Conditions". EKB Journal Management System, 12, 1, 2021, 9-19. doi: 10.21608/eajbsh.2021.134943
A., G., Yaso, I., Kandil, E., Heflish, A., Abd El- Gawad, M. (2021). 'Effect of Planting Dates on the Productivity, Quality and Stemphylium Leaf Blight disease of Some Onion Cultivars Under Nubaria Conditions', EKB Journal Management System, 12(1), pp. 9-19. doi: 10.21608/eajbsh.2021.134943
A., G., Yaso, I., Kandil, E., Heflish, A., Abd El- Gawad, M. Effect of Planting Dates on the Productivity, Quality and Stemphylium Leaf Blight disease of Some Onion Cultivars Under Nubaria Conditions. EKB Journal Management System, 2021; 12(1): 9-19. doi: 10.21608/eajbsh.2021.134943

Effect of Planting Dates on the Productivity, Quality and Stemphylium Leaf Blight disease of Some Onion Cultivars Under Nubaria Conditions

Egyptian Academic Journal of Biological Sciences, H. Botany
Article 2, Volume 12, Issue 1, June 2021, Page 9-19  XML PDF (1010.83 K)
Document Type: Original Article
DOI: 10.21608/eajbsh.2021.134943
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Authors
Gomaa M. A.1; I. A. Yaso2; Essam E. Kandil1; Ahmed I. A. Heflish3; M. S. Abd El- Gawad2
1Plant Production Department, Faculty of Agriculture, Saba Basha, Alexandria University, Egypt
2Onion Research Department, Field Crops Institute, Agric. Res. Center (ARC), Egypt
3Agricultural Botany Department, Faculty of Agriculture, Saba Basha, Alexandria University, Egypt
Abstract
The present study was carried out at the Experimental Farm, Nubaria ResearchStation, Onion Research Department, Agricultural Research Center, Nubaria Region during the two winter seasons of 2018/2019 and 2019/2020 to study the effect of transplanting date on yield, quality and leaf diseases of the four onion cultivars. The two field experiments were laid out in a split-plot system in four replications in both seasons. The main plot was occupied by onion cultivars (Giza Red, Giza 6 Mohasen, Giza White and Giza 20), while the subplots were allocated by transplanting dates (1st November, 20th Novmber and 20th December) in both seasons.





The obtained results showed there was a significant difference among the four onion varieties, where Giza 6 Mohassan recorded the highest yield and quality characters and gave the lowest % bolter, double bulbs and number of days to maturity. Transplanting date 20th November or 20th December recorded the highest values of yield and quality characters and gave the lowest % bolter, double bulbs and number of days to maturity. The interaction between planting dates and onion cultivars was significant on all the studied characters, where planting Giza Red or Giza 6 Mohassan at 20th of November of December recorded the highest ones and gave the lowest % of a bolter, double bulbs and number of days to maturity in the two cropping seasons under the study conditions. The observation of stemphylium leaf blight showed that Giza red is the best variety to resist the disease compared with other varieties. In case of planting date, the best time for planting to reduce the disease is 20th November and 20th December. 
Keywords
Planting dates; yield; Stemphylium leaf blight; onion; quality; varieties
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