Decision support systems in integrated nematode management: the need for a holistic approach

Farmers' decisions regarding the best approach to take in managing a nematode problem are often made just before the planting season begins and then at different stages in crop growth. In many cases an integrated nematode management (INM) system with multiple components is not considered due to lack of knowledge of the severity of the nematode problem, or the absence of an acceptable management tool such as a suitable resistant or tolerant cultivar, an appropriate non-host rotation crop or a suitable biocide for the situation. Seldom, if ever, are data on nematode population densities and distribution patterns across a field taken into consideration in the decision making process. This haphazard approach to INM is comparable to what could be called a 'take a chance' or 'shot in the dark' tactic which often results from the absence of effective decision support tools (DST) or decision support systems (DSS). This chapter discusses presently available information on different forms of DST and DSS as well as the developments that are required to streamline and improve INM.