What is the critical threshold for soybean cyst nematode (SCN) management in soybean?

The critical threshold for managing soybean cyst nematode (SCN) is set at 200 eggs per 100 cm³ of soil. This threshold is significant because it represents the level at which the nematodes can begin to cause noticeable damage to soybean crops. Research indicates that once the population surpasses this threshold, the risk of reduced yield and plant health increases substantially. Managing SCN populations effectively is essential for maintaining soybean productivity, as uncontrolled SCN can lead to severe yield losses. Recognizing this threshold allows farmers and agronomists to make informed management decisions, such as implementing crop rotation or selecting resistant soybean varieties in order to mitigate the impact of SCN on their crops.