For many years, California has had a strong nematode nursery control program for planting stock destined for commercial planting.
As a result of recent state budgetary problems, the funding for this program has recently switched from public to private sources.
Because of the upfront costs involved, nursery programs are often viewed as very costly.
However, if one considers how this cost breaks down for an acre of planting stock as illustrated by this example, the costs are actually rather minimal. The plant spacing figures and harvest estimates were provided by a commercial California nursery.