In nematode certification, what method is used to maintain proper storage of harvested stock?

Maintaining optimal moisture levels is crucial in nematode certification because nematodes are sensitive to their environment, particularly the moisture content in their storage medium. If the moisture levels are too low, it can lead to desiccation and death of these organisms, rendering them unviable for future use. Conversely, excessive moisture can promote the growth of harmful pathogens, which can contaminate the nematodes and compromise their effectiveness. Therefore, regulating the moisture content ensures that the nematodes remain healthy and viable for their intended applications, such as pest control or soil health improvement.

The other methods mentioned would not effectively support the needs of nematodes in storage. Freezing, for instance, would likely damage them due to ice crystal formation, while cooling to standard room temperature may not provide the necessary conditions for their longevity. Additionally, storing in heated containers could lead to overheating, which is also detrimental to their survival. Thus, maintaining optimal moisture levels is the most suitable and effective strategy for preserving harvested nematode stock.