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ARS Home » Midwest Area » Urbana, Illinois » Soybean/maize Germplasm, Pathology, and Genetics Research » Research » Publications at this Location » Publication #84084
Title: TILLAGE AND ROTATION EFFECTS ON POPULATION DYNAMICS OF HETERODERA GLYCINES

Author
item Noel, Gregory
item Wax, Loyd

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 7/19/1997
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: In a 3-year experiment, the population development of Heterodera glycines was determined under conventional tillage and no-till production systems planted with H. glycines-resistant 'Fayette' and susceptible 'Williams 82' soybean grown in rotation with maize. Ratios of final populations of eggs to initial populations (Pf/Pi) were determined. Under conventional tillage, Pf/Pi's for 'Fayette' and 'Williams 82' were 2.5 and 14.9, respectively. Under no-till, the ratios were 4.9 and 28.6 for 'Fayette' and 'Williams 82', respectively. In 1995 maize was planted, and Pf/Pi's were 0.94 and 0.96, respectively, for conventional and no-till plots planted to 'Fayette' in 1994, and were 0.31 for both conventional and no-till plots planted to 'Williams 82' in 1994. In 1996 soybean was planted, and Pf/Pi's under conventional tillage were 9.7 and 5.2 for 'Fayette' and 'Willimas 82', respectively. Under no-till, Pf/Pi's were 7.8 8and 23.1 for 'Fayette' and 'williams 82', respectively. The Pf/Pi ratios in 1996 indicate that the second cropping of 'Fayette' increased the ability of H. glycines to reproduce on 'Fayette'. The effect of tillage on population development was inconclusive.