DSS overview

DSSs for the control of late blight in potatoes in Europe

This list represents DSSs used in several EU countries. The list was compiled via a DSS workshop in the ENDURE project. Please follow the links and find more detailed information about each DSS.



Users and system description


Dacom Disease Management

Late blight and Early blight

With Dacom Disease Management you can view where, when and with what amount you need to apply fungicide. It determines whether present conditions favour an outbreak of disease. If this is the case, it provides you with information regarding the optimum moment to spray. It also indicates which type of fungicide to use. Dacom Disease Management is available for various crops by means of a web application and mobile applications. The advice is calculated based on your crop recording, weather forecast and weather data. 

Cor Rijzebol – Senior Technical Expert


Dacom Farm Intelligence 

+31883226600 - www.dacom.nl


Late blight and Early blight PROPHY is developed and marketed by Opticrop (now Agrovision) for farmers and advisors. Local weather stations and regional weather forecasts are used to identify critical conditions for the development of blight. The duration of protection of the crop with fungicides is calculated. The duration of protection depends on the fungicide used, the dose rate, the variety resistance, rainfastness of the fungicide, the disease pressure, and the growth of the crop. In combining weather and protection with fungicides a recommendation is calculated: a preventative spray is necessary as soon as critical conditions are expected in combination with an insufficient level of fungicide protection of the crop. The system provide a complete advice (yes/no spray, product choice and dose rate). Erno Bouma
Agrovision BV, P.O. Box 755,
7400 AT Deventer NL


Late blight

Mileos ® is a web-based, on-farm Decision Support System (DSS) available to potato growers to control potato late blight (LB) caused by Phytophthora infestans. It results from collaboration between ARVALIS and the French Ministry of Agriculture. The two pre-existing DSS’s (MILPV and Mildi-LIS®) have been fused, in 2009, into an optimized tool, entirely reviewed and up-dated in order to better meet national demand and help farmers to comply with EU regulations.

With Mileos® (see www.mileos.fr), the fungicide application on potato crops is optimized, triggered according a real-time LB risk assessment taking into account environmental data (climatic and disease pressure), agronomical data such as cultivar’s LB resistance and crop health practices for potato fields such as chemical input, cultivar choice and irrigation.

Dennis Gaucher
Arvalis, Institut de Végétal,
F-91720 Boigneville, France

E-mail: d.gaucher@arvalis.fr


Late blight NEGFRY is developed in field experiments in a few agricultural institutes (IHAR-Bonin, IUNG -Pulawy, IOR-Pozna?) and fields of Protection Services since 2001, after cooperation in project with DIAS, Now AU, Denmark. The model supplies information about the optimum time to spray and the type of fungicide to use. A starting date of the protection is accessible for all farmers in Internet, based on nearest synoptic weather station data and calculated by NegFry. Jozefa Kapsa
Plant Breeding and Acclimatization Institute, IHAR,
76009 Bonin, Poland


Late blight and Early blight IPI and MISP are used to forecast the appraisal and evolution of late blight infections on potato and tomato, in the Emilia-Romagna region (Servizio Fitosanitario Emilia-Romagna). Model IPI (Indice Potenziale Infettivo) and Model MISP (Main Infection and Sporulation Period). Model IPI is informative about the occurrence of the disease and advises if it is necessary (and when) to start with the first spray, based on a series of climatic parameters. It was set up in 1990 and is used together with the Model MISP, developed in Switzerland, which provides indications on the following infective events. Riccardo Bugiani
Servizio Fitosanitario, Regione Emilia-Romagna, Via Corticella
133, I-40129 Bologna, Italy

Blight Management

Late blight BLIGHT MANAGEMENT is operated by the Aarhus University (AU), the Danish Agricultural Advisory Service (DAAC) and the Danish Meteorological Institute (DMI). It integrates all available information about late blight control, including tools like monitoring of early attacks, weather based late blight infection pressure, general weather information and -forecast, regional blight weather and -forecast, fungicide information, cultivar database with information about late blight resistance etc. The separate DSS components are not integrated to provide specific decisions on timing and use of a specific fungicide type and dosage. Jens Grønbech Hansen
Aarhus University, Research Centre Foulum
DK-8830 Tjele, DK


Late blight SIMPHYT is developed by ZEPP and provided by ISIP e. V. for farmers and advisors. SIMPHYT 1 recommends on the spray start whereas SIMPHYT 3 provides indications for the disease pressure and advises on follow-up sprays. The input data used are weather information, variety and emergence date. The model can also calculate advises for extra risky situations such as fields close to infection sources or fields with very wet conditions. A nationwide network of untreated and treated plots is used to monitor the presence of late blight. In 2010 Öko-SIMPHYT an expansion for organic potato production will be provided. The system recommends the timing and amount of copper-hydroxid follow up spays. Benno Kleinhenz
Rüdesheimerstrasse 60-68 D-55545 Bad Kreuznach, Germany


Late blight and Early blight Phytophthoramodel-Weihenstephan was developed at the Münich University and is used by Syngenta to inform farmers and advisors. A nationwide network of untreated plots is used to monitor the presence of early and late blight. Information from weather stations is used to indicate blight critical weather. All this information is provided for both early and late blight. The growers and advisors can use this information to design their own spray strategy. Hans Hausladen
Technische Universität München Lehrstuhl für Phytopathologie
D-85350 Freising-Weihenstephan Germany


Late blight PROPLANT is developed and marketed by ProPlant GmbH for farmers and advisors. The Expert Classic system is installed with a CD-ROM on the PC and supplies specific field information about the optimum time to spray and the type of fungicide to use. The Expert.Com system provides interactive recommendation on the internet. Thomas Volk
Proplant GmbH Albrecht-Thaer strasse 34
D-48147 Münster Germany


Late blight PhytoPRE is developed by the Research Station Reckenholz-Tänikon ART for farmers and advisors. The interactive internet DSS and LB information system provides daily actualized maps and information on late blight infected fields in Switzerland. Based on regional and local weather data and the 2-day weather forecasts of MeteoSwiss, it shows current and recent information on main infection- and sporulation periods (MISPs). Spraying recommendations are provided based on field specific information, the current disease situation, weather conditions (MISP), used fungicide and level of fungicide protection. The system has modules for integrated and organic potato production (Bio-PhytoPRE with a special module for the timing and acquisition of copper sprays). Hans-Rudolf Forrer/ Tomke Musa
Agroscope Reckenholz-Tänikon Research Station ARTART
Reckenholzstrasse 191 CH-8046 Zürich Switzerland

Blight Watch

Late blight

The Blightwatch service uses the Hutton Criteria to calculate blight risk across the UK. Using UK Met Office forecast data for thousands of forecast points, the Blightwatch service provides warning indications up to 24 hours ahead of potential Hutton Criteria. Alerts are generated and sent to users based on the warning criteria or when there has been a blight outbreak confirmed through the AHDB Potatoes ‘Fight Against Blight’ service for a selected region. The Blightwatch alerts do not constitute a recommendation to spray but provide an early warning to aid management decisions around spray timing and intervals.

Blightwatch is supported by The Agricultural and Horticultural Development Board (AHDB Potatoes) and operates in conjunction with their ‘Fight Against Blight’ (FAB) service. It also relies on support from agro-industry sponsors.

Claire Hodge, AHDB Potatoes Knowledge Exchange Manager - Scotland e: Claire.Hodge@ahdb.org.uk (link sends e-mail) ¦ t: 07771 798 552


Late blight The VNIIFBlight system was developed in the All-Russian Research Institute of Phytopathology for the farmers and advisors, working in the potato production industry. The model identifies the image of the weather, favourable or unfavourable for the outbreaks in the LB development. Together with a 5-day weather forecast, it provides the information about the optimum time of treatments.

A simple computer program is available for potato growers in the Internet. Each treatment should be applied in accordance with the VNIIFBlight recommendations, but the repeated treatments should be applied not earlier than 7-10 (susceptible cultivars) or 11-14 (resistant cultivars) days after the previous treatment. A cultivar is considered to be susceptible or resistant if its LB resistance is < 5 or > 5 scores, respectively (using a 9-score scale).
Alexey Filippov
All-Russian Research Institute of Phytopathology,
VNIIF, Bolshie Vyazemy, Moscow region
143050, Russian Federation
Irish rules

Met Éireann (Irish Meteorological Service) is issuing blight warnings guided by outputs of algorithm proposed by Bourke (1953), known as Irish Rules. Blight risk is expressed in effective blight hours which are calculated using observed weather data and ten day weather forecast (ECMWF and HILRAM models). Model outputs are used as synoptic weather forecasting guide to weather forecasted on duty. Blight warnings include information about areas affected, duration of spell, and opportunities for spraying, where possible. Warning service is operational from May to September through Met Éireann web page and android app (www.met.ie), daily radio and television broadcast, and email.

Mladen Cucak
PhD fellow
Maynooth University/TEAGASC
Tel. : +353)599183548
Mobile: +353 (0)892571521
e-mail: mladen.cucak@nuim.ie
e-mail: mladen.cucak@teagasc.ie

Nærstad model

Calculations of risk values are based on sub-models for the different steps in the disease cycle like spore production, spore release, spore survival and infection of spores. The model criteria for spore production is long humid periods and at moderate humidity sporulation is reduced. The amount of viable attached sporangia is reduced by drought, and some spores are washed off during rain. The model criteria for spore release into the air is a drop in humidity or increased radiation, but the release is inhibited by high leaf wetness. The model includes criteria for spore survival and the viability of released spores is strongly inhibited by solar radiation. The spore load is also reduced by precipitation. The criteria for infection is that leaf wetness duration has to be sufficient for the spores to germinate and infect. The risk of blight development is a function of the amount of viable released spores and the duration of leaf wetness.

The model outputs are based on the assumption that inoculum is available in the field, and is meant to provide information for optimal timing of pest management strategies.

Håvard Eikemo & Anne-Grete Roer Hjelkrem

Norwegian Institute of Bioeconomy Research (NIBIO)