Nematologist's Comment
Action Codes
Take the letter in the Action Code column and correspond it with the action that is to be taken.
For example, since the letter in the column is "C", it would correspond with Action C: Chemical treatment recommended
A. No expected harm to crop production
B. Possible damage; consider chemical treatment
C. Chemical treatment recommended
D. Use of nematode-resistant variety recommended
E. Rotate with nonhost crop(s)
Nema Notes (if present)
Contain information about nematodes detected in the assay as well as management options.
If there is a number listed in the Nema Notes column, go to the Useful References page to find the corresponding Nema Note.
Ex: Below Nema Note 9 is referenced, so on the Useful References page, find Nema Note 9. You can select "print" to view the larger PDF and/ or print it off.
"S" and "H" Columns
Each pair of columns resides below the species of nematode found in the assay.
Column S = # nematodes per 500 cc soil
Column H = # hazard index for crop.
Nematode Counts & Hazard Index (potential crop damage)
The value in the “H” column is an index of potential harm by the nematode species to the crop listed on the same line:
Hazard index:
0-19 Very Low
20-39 Low
40-59 Moderate
60-79 High
80-100 Very High
So what does this mean?
This page was last modified on 02/26/2026