Fourth International Conference on Spices

Abstract

The present article suggests a simple procedure for estimating yield and production losses in a given crop and region. The utility of the procedure is illustrated by an empirical application to bean production in Cauca Valley, Colombia. Using data obtained from direct field observations on a panel of farms, a production function approach is used to estimate yield and production losses caused by each of the yield constraints identified. It is expected that such estimates will be useful for establishing agricultural research priorities. In an empirical analysis of bean production in Cauca Valley, six important yield limiting factors were identified. Unfavourable rainfall conditions caused a yield loss of about 32% and a total production loss of about US $1.2 million for the region during one growing season. The production losses caused by rust and bacterial blight were slightly smaller. Other important yield constraints were Empoasca kraemeri, angular leaf spot and the use of noncertified seed. Small production increases could be obtained by increasing input use and plant population.