The Workshop was organized upon request from EPPO Member Countries concerned with the harmonization of the dose expression in orchards, vineyards and other high growing crops (often referred to as three-dimensional crops). In order to allow better exchange of data between countries and to avoid unnecessary repetition of trials, dose expression should be harmonized in trials and in zonal efficacy evaluations. The best way to achieve this is to adapt the dose to the area where the treatment is needed. The EPPO Standard PP 1/239 Dose expression for plant protection products states that ‘per treated leaf wall area (LWA) unit’ is becoming a common dose expression method in three-dimensional crops. The GEP certified trial reports which conform to EPPO Standards already contain all relevant information allowing calculation from the applied dose to the LWA. However, the need for a harmonized approach to evaluate and interpret data and information given in trial reports has become increasingly important following the implementation of the EC Regulation 1107/2009, including zonal assessments of Plant Protection Products (PPP).
At the Workshop the focus was on discussion and harmonization of dose expression (i.e. the unit in which the dose is expressed) rather than dose adjustment (i.e. adjustment of the dose to the specific field situations). Dose adjustment was considered as an important aspect to be considered at a national level.
The Workshop provided an excellent opportunity to share experiences and discuss difficulties related to dose expression in the framework of zonal evaluation and mutual recognition. A total of 86 participants, from 18 EPPO countries, including 35 participants from National Regulatory Authorities, Research Institutes and Universities, 29 delegates from crop protection companies and 20 from the consultancy firms were present at the meeting (download the list of participants ).
Picture of Workshop participants - view more pictures >>
Ms Leonhardt (Head of Division for Food Security of AGES) and Ms Stangl (Head of Unit for Plant Products in the Austrian Ministry of Agriculture, Forestry, Environment and Water Management) welcomed participants and made the opening addresses.
Representatives of the Northern, Central and Southern EU authorization zones were asked to give a presentation on the experiences with dose expression in high growing crops in their zone and with the implementation of LWA. These presentations were based on a questionnaire which was circulated to countries in advance of the Workshop.
The next section included talks on dose expression and implementation of dose adjustments:
Participants were divided into four Working Groups by crop to discuss different types of dose expression, the terms used for expressing doses and examples of anonymous trial reports. In the final plenary session moderated by Ms Langer and Ms Jilesen (NPPO, NL), the rapporteurs of each group reported on the conclusions of their respective groups. The following presentations illustrate the conclusions for each group:
For better understanding of the specificities of the citrus and olive groves in Southern countries the following presentations were given: 1) by Ms Chueca on citrus and persimmon, 2) by Mr Fuentes on olive research trials and 3) three slides on citrus, olive, almond, grape production areas in the EU.
General conclusions and recommendations were also elaborated during the Plenary Session and are available by clicking on the link below.
|WORKSHOP CONCLUSIONS and RECOMMENDATIONS|
AT Ingrid Langer and Gabriele Kovacs (AGES, Vienna)
BE Bernard Weickmans and Pierre Hucorne (CRA-W, Gembloux)
DE Gregor Kral (BVL, Braunschweig)
ES Santiago Planas de Martí (Lleida University) and Elena Gutierrez (INIA, Madrid)
FR Veronique Mironet (ANSES, Maisons-Alfort)
NL Claudia Jilesen and Erwin Mol (NVWA, Wageningen)
PL Ewa Matyjaszczyk (Plant Protection Institute Poznan and Grzegorz Doruchowski (Institute of Horticulture, Skierniewice)
ECPA Peter Schlotter, Ralph-Burkhardt Toews and Martin Teichmann
EPPO Vlasta Zlof