Wisniewski M.E., Wilson C.L.

Increasing public concern about the extensive use of synthetic chemicals for the control of plant diseases has led to intensified research efforts world-wide to develop alternative control methods that are safe for humans and the environment. Following the realisation of the risks involved in long term use of pesticides in agriculture, many countries have adapted a policy aimed at minimising the use of synthetic chemical pesticides by establishing vigorous research programs aimed at the development of environmentally sound control measures.