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ARS Home » Midwest Area » Urbana, Illinois » Soybean/maize Germplasm, Pathology, and Genetics Research » Research » Publications at this Location » Publication #113763
Title: POPULATION DYNAMICS OF HETERODERA GLYCINES AND SOYBEAN YIELD IN NO-TILLED PRODUCTION SYSTEMS

Author
item Noel, Gregory
item Wax, Loyd

Submitted to: Journal of Nematology
Publication Type: Abstract Only
Publication Acceptance Date: 8/25/2000
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: The effects of no-till, conventional tillage, and crop rotation on soybean yield and population dynamics of Heterodera glycines were compared during a 5-year study. Either H. glycines-resistant 'Linford' soybean or susceptible 'Williams 82' soybean was rotated with corn and grown on 76 cm-wide rows in both tillage systems. Soybean was planted in 1994, 1996, and 1998. Soybean yield was not affected by tillage in any of the 3 years. Yield of 'Linford' was significantly greater than 'Williams 82' in all 3 years. In years in which soybean was planted, numbers of eggs/250 cm**3 soil increased more on both cultivars in no-till than in the conventional system. The Pf/Pi ratios on 'Williams 82' in the no-till system were 29, 125, and 86 and for 'Linford' the ratios were 5, 40, and 79 for 1994, 1996, and 1998, respectively. However, crop rotation with corn negated these population increases so that numbers of eggs at planting were similar for each cultivar each year that soybean was planted.