Effect of Fungicide Seed Treatment on Stand and Yield of Early-Planted Soybeans in Mississippi. ASA-CSSA-SSSA International Annual Meetings (November 6-10, 2005)

Early planted soybeans in Mississippi are often exposed to cool and wet conditions, which slow germination and predispose seedlings to soil-borne pathogens. The objective of this study was to assess and compare the impacts of different fungicide seed treatments on seedling emergence, stand establishment and seed yield of two soybean cultivars. Four fungicides, Allegiance (metalaxyl), Vitavax 20...

Early planted soybeans in Mississippi are often exposed to cool and wet conditions, which slow germination and predispose seedlings to soil-borne pathogens. The objective of this study was to assess and compare the impacts of different fungicide seed treatments on seedling emergence, stand establishment and seed yield of two soybean cultivars. Four fungicides, Allegiance (metalaxyl), Vitavax 200 (carboxin + thiram), SoyGard (azoxystrobin + metalaxyl), and Rival (captan +PCNB + thiabendazole) were evaluated. Fungicide treated and untreated seeds were planted during the second week of April 2004 using a factorial treatment arrangement in a randomized complete block design. Seed treatment increased plant stand at V3 (third node stage) but fungicide treatment had no effect on stand at V1 (first node stage). Among the chemicals, Vitavax and Rival were the most effective in stand establishment. Plant height was not affected; however, fungicide treatment enhanced seed yield. Seed treatment with SoyGard increased yield by 10% and was the highest yield recorded, although it differed only from that for Allegiance.

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