SCN, a problem in your field??
January 29, 2013
Over the past few years a lot of attention in soybeans has been given to soybean cyst nematode, and for good reason. SCN is the #1 disease in soybeans, found in 31 states. Locally, North Dakota has 12 counties that have tested positvie for SCN, South Dakota has 25 counties, and Minnesota has a whopping 64 counties. SCN is considered an invisible killer because it can remove yield in areas with no visible signs of infection. Without management a person can easily lose 15-30% of their yield to this pest. Although the fall is the best time to collect samples for SCN, there is a lot of buzz about it right now. The best way to detemine if this pest is robbing your fields of yield is to get out and pull some soil cores and have them tested for SCN. A person should collect 20-25, 1″ cores, 6″ – 8″ in depth from areas in the field that a person would expect to find nematodes. These areas would include entrances to the feild, low spots, sandy spots, by tree or fence rows, and areas where you have seen stunted and yellowing plants in the past. It is best to pull the sample from about 2″-4″ from the base of the soybean plant. After the samples are collected, put them all together and get them to a testing laboratory. Most of the Universities in our area will do tests for this (NDSU, SDSU, UMN), and there are some private testing companies as well. Remember that the nematodes are living creatures and need to get there in a timely manner. We at SEEDS 2000 see the importance of managing SCN and are incorporating the best varieties with known resistance traits to SCN. Look for us to be adding more varieties with SCN resistance in the next few years.