REVIEW PAPER The Journal and publications of the Arab Society for Plant Protection are a leading initiative in scientific writing in the Arabic language. Bayaa, K.M. Makkouk and S.G. Kumari (LEBANON & SYRIA) Pages 97-106 ECOLOGY, ETIOLOGY Effect of low temperatures on the activity of the entomopathogenic nematode Heterorhabdites bacteriophora Poinar in Vitro M.H. Al-Zainab and R.U. Ehlers (SYRIA