Control of Phytophthora megakarya diseases of cocoa with phosphonic acid

This project was directly concerned with the development and evaluation of an operator-safe fungicide and application technique against a disease of major importance in a crop (cocoa) grown extensively in the high potential systems of West Africa. The programme was particularly concerned with understanding the current issues surrounding chemical use by smallholder farmers in Ghana and with ensuring that application systems are optimized to the benefit of both farmers and consumers.