Effects of Fungicides Seed Treatments on Seedling Diseases and Yield of Soybeans

Materials and Methods To understand the effect of fungicides in controlling seedling diseases of soybeans, an experiment was conducted at the Northern Research Farm, Kanawha, during the 2005 growing season. Syngenta provided the treated seed, S24-K4. The experimental layout was a randomized complete block design. Each of eleven treatments, including an untreated control, was planted in four replications in 6 rows, 17 ft long and 30 in. apart. Fungicide treatment details are provided in Table 1. The planting date was May 3, 2005. Plant count as plants/acre was recorded at 50% (May 25) and at 100% (June 1) emergence and again at midseason (July 22). Root and shoot biomass was recorded from samplings of five plants from the first and sixth rows in each plot at V4 stage. Five plants were collected, the roots were washed in running water, and dry weights of root mass and shoot were recorded separately as well as combined. Vigor rating and disease scores were on a 0–100% scale. The central four rows of all plots were mechanically harvested on September 30, 2005. Plot yields (bushels/acre) adjusted to 13% grain moisture were recorded.