ABSTRACT
Nematode distribution varies significantly throughout a field. The role of homogeneous vegetation in pest outbreaks, which can also be brought about by the uniform application of pesticides over large areas, has long been recognized by applied crop protection scientists. The simplification of pest communities, their impoverishment of many natural enemies and reduction of their dustered distribution are also brought about by pesticide applications. The success of site-specific nematode management depends on an affordable map of the nematode distribution within a field as the basis for making management decisions. The cost of sampling and making the map must be less than the cost reduction of site-specific management. Application of broad-spectrum nematicides is responsible for killing of natural enemies of the target nematode which can also lead to the resurgence of nematode populations. Geographic information system is a specifically designed data-management system to store spatial data in order to create variable- intensity maps.
