Plant resistance in nematode pest management

Plant resistance is a primary component in the development of nematode pest management programs. A survey of resistant cultivar and rootstock implementation in 75 annual and perennial crops grown in California provides an insight into the current status of plant resistance in modern agriculture. As new sources of commercially suitable resistant germplasm are made available, their successful implementation will require information on quantitative relationships of injury tolerance and hosting ability, and on relationships to intraspecific pathotypes or races present in the major agricultural regions of implementation. Computer simulation and modeling as an aid in developing these programs is discussed. A format for the implementation of a resistant line with good agronomic potential is outlined.