LARGE PLOT DEMONSTRATIONS FOR METHYL BROMIDE ALTERNATIVES ON STRAWBERRY IN BAJA CALIFORNIA, MEXICO
Mexico produces almost 200,000 t of strawberry per year; much of which is produced in Baja California. In 2010 strawberries were grown in 1300 ha of open fields under intensive systems. These crops are cultivated in 23-25 big farms located in San Quintin Valley (33-34°N), along the Pacific Ocean coast, Southern Ensenada. About 60% of the cultivated area is treated annually with 75:25 methyl bromide (MB):chloropicrin. The Mexican Government, through the Secretary of Environment and Natural Resources (SEMARNAT), in cooperation with the United Nations Industrial Development Organization (UNIDO), has launched a Pilot Project to dem¬onstrate alternatives to the methyl bromide for fumigation in strawberry. Chemical alternatives were tested on five farms: Berrymex (2), Rancho Don Juanito, Rancho Santa Mónica and Rancho Agrícola San Simón for three successive cropping seasons 2008, 2009 and 2010. Different cultivars such as Splendor, Driscoll Agoura, Driscoll El Dorado, and Virtue were tested. Fumigant treatments were applied during September and the fields planted in October each year. On each farm, large plots (2,000 m2 per fumigant) were fumigated with the same five chemicals every year: methyl bromide (MB):chloropicrin (50-50); chloropicrin alone; 1,3-dichloro¬propene:chloropicrin (1,3-D:choloropicrin); metam potassium; metam sodium. The traits recorded were: replanting percentage, weed control, early and total yield, and fruit size. Every year, the different fumigants were similar in their effects.
López-Aranda, J.M., Urbina, S., Castellá, G., Estrada, J.F. and Cotero, M.A. (2012). LARGE PLOT DEMONSTRATIONS FOR METHYL BROMIDE ALTERNATIVES ON STRAWBERRY IN BAJA CALIFORNIA, MEXICO. Acta Hortic. 926, 415-422
chemical, fumigants, agronomic traits