The time of year to sample soil is important. With field crops the best time to take samples is in the fall immediately after harvest. Nematode levels are generally highest at this time of year, and it is easiest to determine if a potential nematode problem exists for the following year. However, in some areas nematodes survive the winter, and may be sampled in the spring prior to planting. Consult with the local county agent or extension specialist for the best time to sample.
Nematodes are sensitive to heat and cold extremes, and to excessive drying.
Keep the sample out of direct sunlight and store in a cool place until it can be processed for analysis. Samples should be processed as soon as possible. The following are some disease management suggestions that should be considered. Since management strategies vary from location to location, a local specialist should be consulted for specific strategies, and for cultivar and pesticide recommendations. High quality, certified seed reduces the possibility of introducing pathogens into a field, and also produces vigorous seedlings that sustain less seed decay and seedling disease.