Soil Fumigation Effects on Early Blight of Tomato Transplants

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Abstract
Treatment of field plots with certain general-purpose fumigants for control of soil-borne plant pathogenic fungi and nematodes on tomatoes [Lycopersicon esculentum] grown for transplants also significantly reduced severity of early blight caused by Alternaria solani. Vapam applied as a drench was more effective than methyl bromide and Vorlex in improving plant vigor and reducing severity of early blight. Sodium azide improved vigor slightly but did not significantly reduce early blight. Decreased disease severity on plants in fumigated plots was attributed to increased plant vigor rather than elimination of primary inoculum.

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