Agriculture is one of the major sources of
income in developing countries like India. Pests are one
of the main sources for the degradation of quality and
quantity of the major crops such as Rice and Wheat. The
lack of knowledge about technical & scientific methods to
prevent pest diseases is the main reason for less
production of these commodities. This paper presents an
architectural framework of an agriculture Expert System
and describes the design and development of the rule
based expert system for rice and wheat crop pest
management. The designed system is intended for the
diagnosis of diseases caused by pests in the rice & wheat
plants respectively and it also facilitates different
components including decision support module with
interactive console base user interface for diagnosis on
the basis of response(s) of the user made against the
queries related to particular disease symp-toms. This
paper provides a new approach for knowledge
representation in expert systems for agricultural domain.
The Explanation block (EB) of the system provides the
explanation for a particular decision taken by the system.
Explanation block gives the clear view of logic followed
by kernel of the expert system.