C. Stevens¹, V. A. Khan¹, R. Rodriguez-Kabana², M. A. Wilson³, J. E. Brown⁴,
D. J. Collins⁵, A. E. Fyffe^1
1George Washington Carver Agric Expt Station, Tuskegee Univ,
Tuskegee Institute, AL 36088
²Department of Entomology and Plant Pathology, Auburn University,
Auburn, Alabama 36849
³Department of Agriculture Southeast Missouri State University, Cape Girardeau,
Missouri 63701
⁴Department of Horticulture, Auburn University, Auburn, Alabama 36849
⁵Department of Plant and Soil Science, Southern University, Baton Rouge, LA 70813

Keywords:  soil solarization, allyl isothiocyanate, integrated pest management, urea, damping-off

Abstract: Field plots were solarized in 1998 using Thermofilm-IR film plus soil sprayed with black latex as single layer (SL) and double layers (DL) amended with either furfural (F) or urea (U), and the non-amended controls (O) for two periods (31 days for SL₁ and 28 days for DL₁; and 76 days for SL₂ and 64 days for DL₂).  The objectives were to evaluate damping-off (DO) (caused by Rhizoctonia solani) and weed control (WC)following soil solarization (SS) in 1998 and WC two years following SS in soils amended in 2000 with or without F plus allyl isothiocyanate (AI) or a reduced rate of U on ‘Kentucky Wonder’ pole snapbean.  Percent DO was 35, 24, 25, 26 and 41% in NSO, SLO₁ and SLO₂, DLO₁, and DLO₂ soils, respectively.  Combining F plus AI to all treatments was most effective in significantly reducing DO.  Percent DO for NSF, SLF₁, SLF₂, DLF₁ and DLF₂ was 11, 11, 10, 14, 0%, respectively.  Results in 1998 and 2000, showed complete WC following SS of £ 93% in 1998 and £ 63% in 2000.

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