How should samples be collected for laboratory testing of nematodes?

The preferred method for collecting samples for laboratory testing of nematodes involves gathering roots with some soil attached. This approach is important because nematodes often reside in the soil surrounding plant roots, and collecting both the roots and the surrounding soil provides a more comprehensive sample. It allows for the detection of nematodes that may be closely associated with the root systems, which is crucial for accurately assessing nematode populations and their potential impact on plant health.

Collecting roots with soil ensures that any nematodes present are included in the sample, thereby improving the accuracy of the laboratory testing. This method also helps in understanding the interaction between the nematodes and the plant roots, which is essential for effective management strategies.