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The European Powdery Scab Workshop was held over three days in SAC, Craibstone Estate, Bucksburn, Aberdeen, Scottland, July 20-22, 2000. Scientists, agronomists and technical personnel having expertise in many disciplines, including Biology, Plant Pathology, Mycology, Epidemiology, Virology, Breeding and Agronomy were brought together from seven European countries and from Australia to provide the knowledge necessary to develop an integrated approach towards a sustainable control strategy for powdery scab.


Day 0 (Wednesday 19.7.2000)
- Arrival of participants
- Registration, accomodation
- Get-together dinner

Day 1 (Thursday 20.7.2000)
07.30 - 08.30

Morning session (Chairman: S. Wale)

08.30 - 08.40

08.40 - 08.55


08.55 - 12.30 (15'+10')

08.55-09.20

09.20-09.45

09.45-10.10

10.10-10.30


10.30-11.00

11.00-11.25

11.25-11.50


11.50-12.10

12.10-12.30

12.30-14.00

Afternoon session (Chairman: Paul Gans)

14.00-15.30
15.30-16.00
16.00-18.30


19.30


Breakfast

National potato production and powdery scab situation

Stuart Wale
Welcome address
Ueli Merz
Introductory talk

Presentations by participants

Stuart Wale
The powdery scab situation in Scottland
Steen Lykke Nielsen
Potato production and powdery scab situation in Denmark
Ueli Merz
Potato production and powdery scab situation in Switzerland
Didier Andrivon
Potato production and powdery scab situation in France

Coffee break

Jan van de Haar/Wilbert Flier
Powdery scab situation in the Netherlands
Other European countries and international situation
Ueli Merz
Overview
Dolf de Boer
Powdery scab situation in Australia
Discussion

Lunch

Symptom range and recognition, disease assessment, seed testing

Presentations and discussion of symptom range and the need for identification methods
Coffee break
Discussion of disease scoring systems and a possible standard /
Discussion of seed certification requirements

Dinner


Day 2 (Friday 21.7.2000)
07.30 - 08.30

Morning session (Chairwoman: A. Lees)

08.30 - 12.30 (15'+5')
08.30-08.50

08.50-09.10

09.10-09.30

09.30-09.50

09.50-10.10

10.10-10.30


10.30-11.00

11.00-11.20

11.20-11.40

11.40-12.30

12.30-13.40

Afternoon session (Chairman: U. Merz)

13.40-19.00 (15'+5')

13.40-14.00

14.00-14.20


14.20-14.40

14.40-15.00

15.00-15.30

15.30-16.00

16.00-16.20

16.20-16.40

16.40-17.00



17.00-17.20

17.20-17.40

17.40-18.00

18.00-18.30

19.30


Breakfast

Present powdery scab control measures: Direct and indirect control
(Indirect control incl. resistance, seed certification, crop rotation, avoidance, biocontrol)

Presentations by participants
Alison Lees
Breeding for disease resistance to powdery scab
Paul Gans
Resistance screening
Ueli Merz
Powdery scab control in Switzerland
Wilbert Flier
Resistance screening and cultural practices
Kees Bus
Chemical control of powdery scab
Stuart Wale
Powdery scab control in Scottland

Coffee break

Dolf de Boer
Biofumigants
Ueli Merz
Direct control experiments in New Zealand
Discussion

Lunch

Past and ongoing research on powdery scab and mop top virus

Presentations by participants
Powdery scab
P. van de Graaf
Epidemiology and control of Spongospora subterranea var. subterranea
Karima Bouchek
The detection of S. subterranea f.sp. subterranea by various methods (bioassay tests, molecular and
serological methods
Ueli Merz
Powdery scab. Research in Switzerland
Stuart Wale
Powdery scab research in Sottland
Discussion

Coffee break

Xinshun Qu
The amoebal stage of S. subterranea f.sp. subterranea
Xinshun Qu
Detection of S. subterranea f.sp. subterranea using molecular markers
Xinshun Qu
Some phyllogenetical aspects of the Plasmodiophorales

Mop Top Virus
Angelika Ziegler
Studies on localization and funktion of the putative movement proteins of potato mop top virus
Steen Lykke Nielsen
Past and current Danish research on mop top virus and powdery scab
Valérie Helias
Evaluation and adaption of diagnostic methods for potato mop top virus
Discussion

Dinner

Day 3 (Saturday 22.7.2000)
07.30 - 08.30
08.30 - 09.00

Morning session (Chairman: W. Flier)


09.00-10.30

10.30-11.00

11.00-12.30

12.30-13.30

Afternoon session (Chairman: Didier Andrivon)

13.30-15.00

15.00

Breakfast
Clearing of rooms

Recognizing important components of an integrated control approach incl. new, rapid and cost-effectiv
tools and methodologies (e.g. resistance, biocontrol, crop management, forecasting) and urgent
research needs

Plenary discussion

Coffee break

Plenary discussion

Lunch

Possibilities for collaborative research / An EU proposal

Plenary discussion and conclusions

End of workshop



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