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Effect of tetrachloronitrobenzene (Fusarex) on emergence and yield of potatoes. Part II. — Northeast

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Summary

Seed potatoes of the Katahdin, Kennebec, and Pungo varieties were treated with Fusarex dust containing 6% tetrachloronitrobenzene at three dates in Maine during 1961–62 storage season. In 1962, these chemically treated seed potatoes were planted in uniform tests and compared with seed stocks that had been desprouted once and also with untreated seed tubers. Cooperators in Maine, Long Island, and New Jersey, Pennsylvania, and New Brunswick, Canada recorded plant emergence and yield data at each location.

Treatment of seed potatoes with Fusarex delayed initial plant emergence of all varieties at all locations except in Maine and Canada where Fusarex treatment increased emergence of the Pungo variety as compared to untreated seed. Total emergence varied by variety and location.

Date of seed treatment with Fusarex did not affect emergence significantly. Emergence of desprouted seed tubers was not significantly lower than untreated or chemically treated seed at most locations.

Treatment of seed with Fusarex decreased yields of tubers in Pennsylvania and on Long Island. At all other locations yields were slightly better when seed had been treated with Fusarex. No significant statistical differences in yields occurred between treatments at any of the five test locations when varieties and locations were aceraged.

Resumen

Semillas de papas de las variedades Katahdin, Kennebec y Pungo fueron tratadas en tres diferentes fechas con polvo “Fusarex” al 6% del producto ativo, tetraclorobenceno, durante la estación de almacenamiento. (1961–62) en Maine.

En 1962, las semillas fueron plantadas en pruebas uniformes y comparadas e ntre las que recebieron tratamiento quimico. Las que no recebieron y entre semillas almacenadas que tenian sido deshijadas una vez. Cooperativistas en Maine, Long Island, New Jersey, Pennsylvania y New Brunswick, Canada, reuniron dados sobre la germinación y rendimiento de las plantas en cada localidad.

El tratamiento de las semillas con “Fusarex” retardó la germinación de todas las variedades, y en todas las localidades, excepto en Maine y en Canada. En donde el tratamiento con “Fusarex” estimuló de germinación de la variedad Pungo, cuando esta fué comparada con semillas no tratadas. Las fechas de los tratamientos de las semillas con “Fusarex” no afectaron significativamente la germinación.

En la mayoria de las localidades la germinación de las semillas deshijadas no fué significativamente más baja que la de las semillas no tratadas, o en las tratadas quimicamente.

El tratamiento quimico de las semillas con “Fusarex” reducció la cosecha en Pennsylvania y en Long Island.

En todas las otras localidades las cosechas fueron ligeramente superiores, cuando las semillas habian sido tratadas con “Fusarex.” En minguna de las localidades, las cosechas obtenidas en los diferentes tratamientos estudiados, fueroo estadisticamente siguificativos, cuando variedades y localidades fueron comparadas.

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Literature Cited

  1. Brown, W. 1947. Effect of chlorinated nitrobenzenes on the sprouting of potato tubers. Ann. Applied Biol. 34: 422–429.

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  2. Murphy, H. J. and M. J. Goven. 1967. Effect of tetrachloronitrobenzene (Fusarex) on emergence and yield of potatoes. Part I. Maine. Amer. Potato J. 44: 272–276.

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Murphy, H.J., Goven, M.J., Campbell, J.C. et al. Effect of tetrachloronitrobenzene (Fusarex) on emergence and yield of potatoes. Part II. — Northeast. American Potato Journal 45, 168–173 (1968). https://doi.org/10.1007/BF02849144

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  • DOI: https://doi.org/10.1007/BF02849144

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