Which nematode is usually managed by practicing crop rotation and planting resistant varieties?

The soybean cyst nematode is a significant pest affecting soybean crops, and effective management practices include crop rotation and the use of resistant soybean varieties. Crop rotation interrupts the life cycle of the nematode by planting non-host crops, thereby reducing its population in the soil. Legumes, such as soybeans, provide a conducive environment for the nematode, so rotating with crops that are not hosts helps mitigate the pest's impact.

Additionally, planting resistant varieties is crucial, as these have been specifically bred to withstand or combat the effects of the soybean cyst nematode. The resistance traits in these varieties can help ensure better crop yields and lower economic losses associated with nematode damage. This two-pronged approach of rotating crops and using resistant cultivars is a foundational strategy in integrated pest management for this specific nematode.

In contrast, while root-knot nematodes, root lesion nematodes, and spiral nematodes can also be managed using various strategies, they might not be as effectively managed solely through the practices of crop rotation and resistant variety planting as the soybean cyst nematode. Each of these nematodes may require different or additional measures tailored to their specific life cycles and host preferences.