Symptoms of Ditylenchus destructor on the bulbs of flowering plants such as irises and tulips are similar to those of potatoes, except infection usually occurs at the bulb’s base and moves upwards. The fleshy scales develop discolored yellow to black lesions, the roots become blackened, and leaves can develop yellow tips. Potato rot nematodes in groundnuts, such as peanuts, develop blackened hulls, shrunken kernels, and embryos with a brown discoloration.
