Dosage des produits adapté à la haie foliaire dans les cultures maraîchères à forte croissance sous abri | The leaf wall areas as a likely method to adapt the dosage of crop protection products in tall glasshouse vegetable crops
2013
Jermini, M. | Scettrini, S., Forschungsanstalt Agroscope Changis-Waedenswil ACW, Cadenazzo (Switzerland) | Rüegg, J. | Total, R.
Various methods for the harmonization of the registration of crop protection products and dose adjustments in high growing crops have been discussed over many years. The leaf wall area (LWA) method has been known for some years already but received renewed attention due to a proposal by the European agrochemical manufacturing industry for harmonizing the dose expression in view of the new zonal registration system in the EU. The LWA method appears not only suitable for fruit trees and vineyards, but may also prove a simple and widely accepted method for dose adjustments in high growing vegetable crops particularly in greenhouses. This paper provides a dataset on the development of the leaf wall area and the leaf area for cucumber, eggplant, sweet pepper and tomato varieties grown in Switzerland. Relationships between the leaf wall area and the leaf area have been established. A tentative product dose adjustment to growing vegetable crops in greenhouses is given for Switzerland. Biological efficacy trials will be required to validate the LWA method.
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