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ARS Home » Midwest Area » Urbana, Illinois » Soybean/maize Germplasm, Pathology, and Genetics Research » Research » Publications at this Location » Publication #75756
Title: EFFECTS OF TILLAGE ON YIELD OF SOYBEAN AND POPULATION DEVELOPMENT OF HETERODERA GLYCINES

Author
item Noel, Gregory
item Wax, Loyd

Submitted to: Nematropica
Publication Type: Abstract Only
Publication Acceptance Date: 7/7/1996
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: A long-term experiment was established in 1994 to investigate population development of Heterodera glycines and yield of resistant ('Fayette') and susceptible ('Williams 82') soybeans grown in rotation with maize under conventional and no-till production systems. the experimental design was a split-plot with tillage as main plots and cultivars as subplots. Nematode populations were determined at planting and at harvest. In 1994 initial numbers of eggs/250 cm3 of soil averaged 1,700 (range = 75-24,000). 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. Nematode reproduction was affected significantly (P <0.003) by planting 'Fayette'. Effects of tillage on Pf/Pi were significant at P <0.16. A significant tillage x cultivar interaction for Pf/Pi was not observed. Yield of 'Fayette' (3,200 kg/ha) was greater (P <0.0001) than 'Williams 82' (2,150 kg/ha), but yield was not affected by tillage. In 1995 maize was planted, and numbers of nematodes declined and were lower (P <0.05) in plots planted to resistant 'Fayette' in 1994. In contrast to 1994, number of H. glycines were lower (P <0.02) in no-till plots in 1995.