A BCI-algebra is a non-empty set X with a binary operation, distinguished
element 0, and the binary operation satisfying some conditions.
In this paper we presents a generalization of some important known
identities in BCI-algebras that could be help in starting new studies in this field.
Field survey was conducted to identify plant nematode genera associated
with maize crop during the period August-October 2003. The study was carried
out at two locations: Kharabo station (Damascus countryside) and Al-Mraieh
station (Deir Al-zowr)
in Syria. 36 complex samples were collected from roots
and rhizosphere soil; nematodes were extracted by two methods Sieving and
Baermann funnel, examined under microscope for identifi cation. Population
density and absulute frequency for each genera were calculated. Results of field
survey showed the presence of 14 genera of plant parasitic, 4 fungivorous, and
12 omnivorous nematodes in maize roots and rhizosphere soil .
