Soybean nematodes live in all soil environments, but damage is often more apparent in lighter, sandier soils, or under stress conditions. While symptoms vary and are not always visible, growers will notice a loss in yield. Symptoms can include premature yellowing and wilting, root galls, chlorosis of the leaves, stunting of roots and shoot, poor pod set and reduced feeder roots. Nematodes also cause significant damage to crops by facilitating fungal infections that can lead to extensive root decay.
To clearly identify below-ground symptoms, roots should be dug and closely examined. Below- and above-ground symptoms are not always distinct enough to use as a sole basis for diagnosis, so it is best to collect soil and root samples for a laboratory analysis.
Do you know if you have nematodes in your fields?