Author: A.A.M. DAWABAH* AND A.S. AL-HAZMI
Publishing Date: 2007
Volume 25 Issue 2
Cereal cyst nematode, Heterodera avenae Wollenweber, 1924, is the most important pest and limiting factor of wheat and barley production in Saudi Arabia (Al-Hazmi et al., 1999; Ibrahim et al., 1999). The nematode was first reported from Al-Bakiriah, Gassim region in 1987 (Youssef, 1987). Since then, it has been spreading in wheat fields in the Kingdom, as it has been frequently encountered in 52-90 % of the total soil samples collected from wheat field in the three major wheat producing regions located in Riyadh, Gassim and Hail (Al-Hazmi et al., 1994). The pathotype of the nematode was then identified as pathotype Ha21 (Al-Hazmi et al., 2001).