pnut pnut Peanut Science 0095-3679 0095-3679 American Peanut Research and Education Society 10.3146/i0095-3679-16-2-4 Articles CSGR-1: A Computer Simulator of Groundnut Rust1 Zhenzhong Wang *, 2 and Kung-hsun Lin 2 Lecturer and Professor, Department of Plant Protection, South China Agricultural University, Guangzhou, Guangdong Province, People's Republic of China

1A portion of M.S. thesis of the senior author approved for publication by the Department of Plant Protection, South China Agricultural University, Guangzhou, Guangdong Province, People's Republic of China.

 *Corresponding Author. 7 1989 16 2 73 76 18 11 1989 American Peanut Research and Education Society 1989 American Peanut Research and Education Society Abstract

A computer simulator of groundnut rust (Puccinia arachidis Speg.), CSGR-1, was constructed based on four mathematical submodels describing environmental effects on (1) the increase rate of disease severity and daily multiplication factor of diseased leaflets, (2) the relationship between host growth and the effective accumulated temperatures, and (3) the relationships between infectious tissue and disease severity. The simulator was validated using independent data sets. With CSGR-1, disease development of groundnut rust can be predicted eleven days in advance given appropriate climatic data.

 Key Words Puccinia arachidis Speg; , Arachis hypogaea L. peanut; , epidemiology; , computer simulation