EFFECTS OF CULTIVARS, SUBSOILING, AND FUMIGATION ON SOYBEAN YIELDS AND MELOIDOGYNE-INCOGNITA POPULATIONS

  • 1 January 1978
    • journal article
    • research article
    • Vol. 10  (1) , 43-47
Abstract
Application of 1,2-dibromo-3-chloropropane (DBCP) and subsoiling under the row in Tifton sandy loam heavily infested with M. incognita increased yields of 4 soybean [Glycine max] cultivars. These cultivars have levels of resistance to M. incognita as follows: ''Hutton'', high; ''Essex'', intermediate; ''Davis'' and ''Ransom'', low. After growing these 4 cultivars, subsoiling and applying DBCP for 2 yr in the same plots, the residual effects of these practices on yield of ''Davis'' and populations of M. incognita were studied. Greatest yields of ''Davis'' were obtained on plots previously planted to ''Hutton'' and ''Essex'' and on plots previously treated with DBCP for 2 yr. Residual effects of subsoiling on yield were not significant. Data on nematode populations indicated that some residual effects occurred because of cultivars and nematocides. Root-knot was suppressed only where DBCP was applied the 2 previous yr. Although beneficial residual effects occurred, they were not sufficient for maximum soybean production.

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