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Effect of annual sequence of removing or flaming potato vines and fumigating soil on verticillium wilt of potato

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Abstract

The effects of removing or flaming potato vines and soil fumigation on population density ofVerticillium dahliae in soil, severity of Verticillium wilt, and tuber yield were studied in a field near Alliston, Ontario, between 1993 and 1996. Vines were physically removed or flamed using a propane flamer in September just before harvest and soil was fumigated with metam-sodium (Vapam) at 550 L/ha in October after harvest. Vine removal had no effect on soil populations ofV. dahliae, area under the disease progress curve (AUDPC), or tuber yield. Flaming once (1993), twice (1993 and 1994), or three (1993,1994, and 1995) times reduced the soil population density ofV. dahliae, and flaming twice (1993 and 1994) reduced AUDPC compared to the nontreated control, but had no effect on tuber yield. Fumigation once (1993) or twice (1993 and 1994) reduced pathogen density in soil and AUDPC, but did not increase tuber yield. Fumigation once (1993) or twice (1993 and 1994), in combination with flaming twice (1993 and 1994), was equally and significantly effective in reducing both population density ofV. dahliae in soil and AUDPC values and in increasing tuber yield in 1995. Annual flaming of vines in combination with soil fumigation once (1993) or twice (1993 and 1994) in the fall improved the control of Verticillium wilt of potato and realised the greatest profits.

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Authors and Affiliations

  1. Olds CoUege, 4500-50th Street, T4H 1R6, Olds, AB, Canada

    S. I. Mpofu

  2. Department of Environmental Biology, University of Guelph, N1G 2W1, Guelph, ON, Canada

    R. Hall

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  1. S. I. Mpofu
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  2. R. Hall
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Correspondence to S. I. Mpofu.

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Mpofu, S.I., Hall, R. Effect of annual sequence of removing or flaming potato vines and fumigating soil on verticillium wilt of potato. Am. J. Pot Res 79, 1–7 (2002). https://doi.org/10.1007/BF02883517

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  • DOI: https://doi.org/10.1007/BF02883517

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