ISHS Acta Horticulturae 698: VI International Symposium on Chemical and non-Chemical Soil and Substrate Disinfestation - SD2004
WATER VOLUME AS RELATED TO EFFECTIVENESS OF 1,3-DICHLOROPROPENE AND CHLOROPICRIN MIXTURE BY DRIP APPLICATION FOR A STRAWBERRY CROP IN SPAIN |
| Authors: | V. Cebolla, R. Bartual, V. Maroto |
| Keywords: | soil, disinfestation, alternative, methyl bromide |
| Abstract:
The most commonly used chemical alternatives to methyl bromide for large field strawberry production in Spain are applied by shank injection in open air. For small plots or glasshouses, which must be disinfested we used drip irrigation with an emulsifiable mixture of 1,3-dichloropropene and chloropicrin. This mixture was applied in two water volumes (18 and 36 L/m2) and at two dosages (35 and 50 g/m2). We also tested the effect of applying irrigation before treatment and of adding wash water after treatment, and the volumes added were measured with a volume counter. Efficacy of treatments was compared by evaluating the control of plant pathogenic fungi and the disease they caused, populations of weeds, assessing plant vigour, yield and product quality. All treatments gave control of fungi and weeds, vigour of plants and quality of fruits, comparable to or better than that of plants grown in methyl bromide treated soil. The best marketable yields were found in treatments that utilized high water volumes during application of fumigant. A high degree of variability was found when the volume of the liquid used for application was less than 18 L/m2. Low marketable yield was found when the wash water volumes were below 3 L/m2. The fumigant concentration varied between 0.68 and 2.5 g/L for the treatment that produced the highest values of marketable yield. | |
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