Once the seedlings show signs of damping off, the infected seedlings are removed and taken into the micro lab for root culturing. After positively identifying the disease through microscopy techniques, an indexing number is assigned to the soil sample. The rating is a number from 0 to 100. It is a relative measure of the severity of aphanomyces root rot inoculum in your field. It is based on a disease class rating of seedlings grown in your soil sample.
Weather conditions determine level of risk and crop loss.
20 lbs. of soil per sample minimum. Samples can be taken at any time during the year. Each sample should represent the entire field. If you want to split a field we would need two separate samples. Sampling should be taken at random in at least 6 different locations throughout the field including one high area and one low area.