Summary report of the mid term meeting of the CGIAR held in Paris, May 21-23, 1991, Wilfried P. Thalwitz presiding. The CGIAR Executive Secretary reported that pursuant to the decision to expand the CGIAR, IIMI and INIBAP were now in the system; ICRAF and ICLARM had agreed to join, subject to conditions specified by the Group. Mr. Thalwitz reported that he had made some progress on his China visit, but the situation of AVRDC could not be resolved yet. McCalla said an agreement between INIBAP and IITA was awaiting approval by the former's Executive Committee.The TAC Chair introduced a paper defining an ecoregional approach to research, and CIAT presented its program in that framework. The Group gave broad endorsement to TAC's approach, but p...