Seasonal Flight Activity of Scolytus Amygdali Guer on Apricot Trees by Using Trap Logs at Fayoum Governorate

Abstract

Seasonal flight activity of the scolytid, Scolytus amygdali was studied by using trap logs on apricot trees at Fayoum Governorate, during the two seasons 2002 and 2003. It was noticed that in year, the first occurrence of beetles was around mid March, where the mean number of trapped beetles was (1 beetle/trap) at daily mean temperature 19.8 o C and 62% R.H. The beetles had four peaks, the first peak was (4 beetles/trap) in mid June, the 2 nd peak was (7 beetles/trap) in late July, the 3 rd peak was (5.8 beetles/trap) in mid September and the 4 th peak was (9.4 beetles/trap) in mid November.In 2003 year, the beetles appeared in late March by (1.4 beetles/trap) at 17.6 o C and 58% R.H. The beetles had three peaks, the 1 st peak was (1.8 beetles/trap) in late May, the 2 nd peak was (4.4 beetles/trap) in late July and the 3 rd peak was (10.4 beetles/trap) in mid November.Simple correlation between temperature and seasonal flight activity was highly significant while it was insignificant between relative humidily and seasonal flight activity during the two seasons 2002 and 2003 years.