Monitor soybean cyst nematode populations in Ohio for the numbers of eggs per 100 cc per sample
Determine which source of resistance for SCN, Peking or PI 88788, will be most effective across Ohio
Evaluate the efficacy of different management strategies for SCN in OhioApproaches: there are several approaches that can assist in the decline of SCN in Ohio production fieldsa)Cover crop studies – can a stand of Rye or oil seed radish help to reduce SCN populations over time? Since 2015, we have planted strips of rye and oil seed radish and compared this to a fallow treatment at Waterman Farm. These trials can be expanded.b)Seed Treatments – Evaluate the effects of ILevo, and other SCN seed treatments on SCN populations to assess if it reduces or changes the SCN reproductive factors during the season and yield. Previous studies were done prior to adaptation of SCN to PI 88788, In NCSRP multi-state project, we did have significant effect of SCN seed treatment on yield in a field with high SCN populations (<3,000 eggs/100 cc).The question is: Will these seed treatments help to reduce impact of SCN on plants and/or overall reproduction during a growing season?c)Biological control – several biological control strategies are currently on the market that attack the SCN. Monitoring changes in these populations over time has not been done. We will establish long term monitoring sites where these biological control materials were applied.d)Sampling strategies – with Integrated Ag we have examined the soil sampling machine

Update:
Objective 1 Sample bags were given to producers via mail and 1,000 were prepared for Farm Science Review. Additionally, sample bags were given to county educators at a training in December. We processed the samples at two locations, in the Niblack lab in Columbus and the Dorrance lab in Wooster. For the first report in July 2018 we had received 83 samples from 22 counties in total (July 1) By December we received 238 samples from 37 counties in total and all were processed and the numbers have been reported back to the person who submitted the sample. SCN Population Level (eggs/100 cc) Total fields % processed None Detected 89 37.4 Trace (40-200) 58 24.4 Low (200-2000) 58 24.4 Moderate (2000-5000) 22 9.2 High (5000 +) 11 4.6 Objective 2. The samples from objective 1 that have egg counts higher than 500 eggs/100 cc of soil will be moved into the greenhouse screen to determine the SCN type. Populations of SCN will first be increased on Williams 82. Test lines [PI548402 (Peking), PI88788, and PI437654] and positive controls (Lee74, Williams 82) will be inoculated with 2500 eggs/second stage juveniles to determine relative virulence. In the past 3 months • 30 populations were increased under greenhouse conditions. • 8 populations are currently in SCN Type greenhouse test Objective 3. Several different SCN management studies are in progress. 1. A study that is evaluating if Rye has any influence on SCN populations was planted again for the third year with a cover crop. a. Fall soil samples were collected to assess preliminary SCN population numbers and analysis is in process. 2. Field experiments at 3 locations with high SCN populations were finally harvested to evaluate Seed treatment nematicides. Processing of soil samples was completed for some locations. One is still in progress, and analysis. Additional information: 1. Dorrance, Ralston, and Winger all participated in the SCN Coalition Meeting held in St. Louis MO on Nov 6-8th. Excellent discussion and planning for the 2019 season.