Samples submitted for diagnostic testing, including molecular diagnosis of guava root-knot nematode species, will be given priority. Those results should be available in around five working days. Currently, there are around 15,400 samples waiting analysis.

The Nematode Assay Lab can assay soil samples for the presence of at least 46 different plant-parasitic nematodes, which are microscopic threadlike worms that live in the soil. The results of a nematode assay help growers make important management control decisions for the upcoming crop season.

This highly detailed work requires up to a year of specialized training. Even with three experienced nematology technicians and a lab manager, the lab can process only about 200 samples per day, said Dr. Weimin Ye, nematologist for the N.C. Department of Agriculture and Consumer Sciences. Two new staff members are currently in training and five temporary employees have been hired to help prepare samples for analysis by trained staff. Samples received before Dec. 1 are expected to be complete at the end of March. 

“Given the anticipated delays, growers should consider whether or not assay results will be ready in time to make management control decisions before submitting additional samples to the Nematode Assay Lab,” Ye said. 

For updates on turnaround times, visit ncagr.gov/agronomi/pals/default.aspx. Growers with nematode-specific concerns or questions can contact Ye at 919.664.1600 or This email address is being protected from spambots. You need JavaScript enabled to view it..