Generally longer injection times than used for insecticides and fungicides are recommended for nematode applications. Pressure losses in the range of 5-10 PSI can result over the length of the line. Pressures below 40 PSI are not recommended. Sprinkler head pressure should be between 40-55 PSI at the farthest point. Under optimal environmental conditions and application methods, nematode infected target pest stages should be found within about 5-7 days after application.
Pest mortality is temperature dependent.
Cooler soil temperatures may slow nematode activity and delay pest mortality whereas higher optimal soil temperatures may hasten mortality. Roll back cranberry vines in suspected areas and look for nematode infected target pest stages. Steinernema infected cadavers are either yellow, brown, or dark gray depending on pest and nematode species. After initial application, nematodes will develop and reproduce within infected cadavers and new generations of infective juveniles will emerge to seek out additional hosts over the next few weeks. Thus, the full impact of nematode applications might not be realized for several weeks or more after the application.