Population Fluctuation and Determination of The Economic Injury Level and The Economic Threshold for The Sugarbeet Fly, Pegomia hyo-scyami Curtis, in Nobaria Region, El-Behaira Governorate, Egypt.
Zaghloul, O., Abdelzaher, M., Mesbah, H., Zarif, G., Kandil, R. (2015). Population Fluctuation and Determination of The Economic Injury Level and The Economic Threshold for The Sugarbeet Fly, Pegomia hyo-scyami Curtis, in Nobaria Region, El-Behaira Governorate, Egypt.. EKB Journal Management System, 20(4), 630-641. doi: 10.21608/jalexu.2015.161606
Ossman Zaghloul; Magdy Abdelzaher; Hassan Mesbah; George Zarif; Ragab Kandil. "Population Fluctuation and Determination of The Economic Injury Level and The Economic Threshold for The Sugarbeet Fly, Pegomia hyo-scyami Curtis, in Nobaria Region, El-Behaira Governorate, Egypt.". EKB Journal Management System, 20, 4, 2015, 630-641. doi: 10.21608/jalexu.2015.161606
Zaghloul, O., Abdelzaher, M., Mesbah, H., Zarif, G., Kandil, R. (2015). 'Population Fluctuation and Determination of The Economic Injury Level and The Economic Threshold for The Sugarbeet Fly, Pegomia hyo-scyami Curtis, in Nobaria Region, El-Behaira Governorate, Egypt.', EKB Journal Management System, 20(4), pp. 630-641. doi: 10.21608/jalexu.2015.161606
Zaghloul, O., Abdelzaher, M., Mesbah, H., Zarif, G., Kandil, R. Population Fluctuation and Determination of The Economic Injury Level and The Economic Threshold for The Sugarbeet Fly, Pegomia hyo-scyami Curtis, in Nobaria Region, El-Behaira Governorate, Egypt.. EKB Journal Management System, 2015; 20(4): 630-641. doi: 10.21608/jalexu.2015.161606

Population Fluctuation and Determination of The Economic Injury Level and The Economic Threshold for The Sugarbeet Fly, Pegomia hyo-scyami Curtis, in Nobaria Region, El-Behaira Governorate, Egypt.

Journal of the Advances in Agricultural Researches
Article 5, Volume 20, Issue 4, December 2015, Page 630-641  XML PDF (152.28 K)
Document Type: Research papers
DOI: 10.21608/jalexu.2015.161606
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Authors
Ossman Zaghloul1; Magdy Abdelzaher1; Hassan Mesbah1; George Zarif2; Ragab Kandil2
1Faculty of Agric. (Saba Basha), Alex. Univ., Egypt.
2Plant Protection Research Institute, Agric. Res. Center, Egypt
Abstract
Experiments were conducted in a private farm cultivated with sugarbeet crop (Top cv.) for the two successive seasons of 2013/2014 and 2014/2015 to determine the economic damage threshold levels of Pegomia hyo-scyami Curtis (Diptera: Anthomyidae) under field conditions in Nobaria region, El-Behaira Governorate, Egypt. The results showed that the relationship between the yield of sugarbeet and the infestation of sugarbeet fly, Pegomia hyo-scyami Curtis (Pegomyia mixta Vill.) was negative, which is means that an increase in larvae numbers caused a decrease in roots yield and vice-versa.
In both seasons, Pegomyia hyo-scyami Curtis larvae registered two seasonal peaks of abundance that occurred in February and March.
The determined economic threshold level for Pegomia hyo-scyami Curtis was 19 larvae / plant and the economic injury level was 22 larvae / plant in the first season. But the values were 21 larvae / plant and 22 larvae / plant, in respect, in the second season.
Keywords
Sugarbeet (Beta vulgaris L.); sugarbeet fly; Pegomia hyo-scyami Curtis; Pegomyia mixta Vill; Economic threshold (ETs); the economic injury level (EILs) and roots yield
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