Strawberry production from transplants fumigated with methyl bromide alternatives

Abstract

Research aimed at finding alternatives to methyl bromide has tended to focus on strawberries, since this crop is the largest methyl bromide consumer in Spain, pre-plant soil fumigation with methyl bromide, or with mixtures of methyl bromide and chloropicrin, are standard practices for controlling soil-borne diseases. Methyl bromide, however, has been phased out due to its environmental risks except for critical use exemptions. Soil fumigants were evaluated as alternatives for methyl bromide soil fumigation at two high-elevation strawberry nurseries in Spain. Strawberry plants produced at high elevation nurseries were evaluated for fruit yield at two commercial fruit production sites. All fumigation treatments had higher stolon production than plants grown in non-fumigated soil. The results indicate that pre-plant soil treatment with chloropicrin alone or 1,3-dichloropropene plus 35% chloropicrin could be potential alternatives to methyl bromide for soil treatment at high-elevation strawberry nurseries in Spain.

El cultivo del fresón es un gran consumidor de bromuro de metilo para el control de los agentes telúricos de suelo. La fumigación del suelo en preplantación con bromuro de metilo o con mezclas de bromuro de metilo y de cloropicrina es una costumbre habitual en los campos de fresón. Sin embargo, su utilización ha sido prohibida, excepto para usos críticos, debido a los riesgos ambientales que conlleva. Se ensayaron varias alternativas al bromuro de metilo en dos viveros de altura del norte de España y las plantas producidas en estos viveros fueron evaluadas en dos localidades productoras de fresón. Los resultados indican que todas las parcelas fumigadas registraron un mayor número de plantas hijas que aquellas no fumigadas, y que el tratamiento en preplantación con cloropicrina, sola o combinada al 35% con 1,3 D, podría considerarse una alternativa potencial al bromuro de metilo en los viveros de altura.