Home Articles List Article Information
Egyptian Journal of Agricultural Research
Journal Archive
Volume Volume 102 (2024)
Volume Volume 101 (2023)
Volume Volume 100 (2022)
Volume Volume 99 (2021)
Volume Volume 98 (2020)
Volume Volume 97 (2019)
Volume Volume 96 (2018)
Volume Volume 95 (2017)
Volume Volume 94 (2016)
Volume Volume 93 (2015)
Volume Volume 92 (2014)
Volume Volume 91 (2013)
Volume Volume 90 (2012)
Volume Volume 89 (2011)
Volume Volume 88 (2010)
Volume Volume 87 (2009)
Volume Volume 86 (2008)
Volume Volume 85 (2007)
Volume Volume 84 (2006)
Volume Volume 83 (2005)
Volume Volume 82 (2004)
Volume Volume 81 (2003)
Volume Volume 80 (2002)
Volume Volume 79 (2001)
Volume Volume 78 (2000)
Volume Volume 77 (1999)
Volume Volume 76 (1998)
EL-SAPPAGH, I. (2018). EFFECT OF CERTAIN WEATHER FACTORS ON POPULATION DENSITY OF Thrips tabaci LIND. ATTACKING ONION CROP. Egyptian Journal of Agricultural Research, 96(1), 31-38. doi: 10.21608/ejar.2018.129147
Ibrahim A. EL-SAPPAGH. "EFFECT OF CERTAIN WEATHER FACTORS ON POPULATION DENSITY OF Thrips tabaci LIND. ATTACKING ONION CROP". Egyptian Journal of Agricultural Research, 96, 1, 2018, 31-38. doi: 10.21608/ejar.2018.129147
EL-SAPPAGH, I. (2018). 'EFFECT OF CERTAIN WEATHER FACTORS ON POPULATION DENSITY OF Thrips tabaci LIND. ATTACKING ONION CROP', Egyptian Journal of Agricultural Research, 96(1), pp. 31-38. doi: 10.21608/ejar.2018.129147
EL-SAPPAGH, I. EFFECT OF CERTAIN WEATHER FACTORS ON POPULATION DENSITY OF Thrips tabaci LIND. ATTACKING ONION CROP. Egyptian Journal of Agricultural Research, 2018; 96(1): 31-38. doi: 10.21608/ejar.2018.129147

EFFECT OF CERTAIN WEATHER FACTORS ON POPULATION DENSITY OF Thrips tabaci LIND. ATTACKING ONION CROP

Article 16, Volume 96, Issue 1, March 2018, Page 31-38  XML PDF (551.85 K)
Document Type: Original Article
DOI: 10.21608/ejar.2018.129147
View on SCiNiTO View on SCiNiTO
Author
Ibrahim A. EL-SAPPAGH
Plant Protection Research Institute, Agricultural Research Center, Giza, Egypt
Abstract
Changes in the seasonal population of Thrips tabaci lind. attacking onion crop and the effect of certain weather factors were studied throughout (2015/2016 & 2016/2017) onion growing seasons. T. tabaci appeared in few numbers by the 1st week of January. Dynamics of the nymph and adult stages showed increasing steadily 3th week of February until 1st week of April. The values of correlation coefficient infer that infestation and degree days are positive correlated and non- significant. The weather factors as maximum temperatures and maximum & minimum relative humidity didn't give significant correlation. On the contrary, the minimum temperature give significant correlation where r= 0.509 with probability p= 0.031 during first season. On the other hand, all weather factors were positively correlated with non significant except the minimum R.H. during second season. Considering, plant age as polynomial relation (y=a+b1x +b2x2+b3x3) resulted in strong and significant correlation and regression.
Keywords
Onions; weather factors; white flies; Thrips tabaci
Statistics
Article View: 106
PDF Download: 444