International Blue Mold Reports for 2003

from the

CORESTA Blue Mould Warning Service

CORESTA, headquartered in Paris, France, has a network of expert observers servicing the regions of Europe, North Africa, and the Middle East. The detailed reports issued by CORESTA are given below. We wish to thank Francois Jacob, the CORESTA staff, and the international observers for their cooperation in this endeavor. Please visit their web site at www.coresta.org.

Site of Outbreak

Observation Date

Received by CORESTA

REPORT

Tunisia	April 8, 2003	April 18, 2003	Site: Sejenane and El Guetma regions (Northern Tunisia). Light, localised outbreak in seedbeds on seedlings at transplanting stage. Dark air-cured tobacco Variety 8-4/7-2 affected. Climatic conditions very conducive to blue mould. Treatment with Ridomil MZ 58. Information received from Hamadi YAHIAOUL, Regie Nationale des Tabacs et Allumettes - Tunis (Tunisia). April 18, 2003. Ref. 091
Morocco	April 9, 2003	April 30, 2003	First outbreak of blue mould at the Crop Control Centre at Ain Dorrij. Traces of blue mould observed in seedbeds of dark tobacco, variety B 47, at the 5 to 6 leaf stage. Information received from H. Senhadji and A. Guedira, Regie des Tabacs - Casablanca (Morocco). April 30, 2003. Ref. 097
Iran	April 4, 2003 April 24, 2003	May 6, 2003	Outbreak of blue mould on seeklings at the 4-6 leaf stage. Bergerac c. variety affected on 5 April and Burley 21 and Basma 178-2 varieties affected on 24 April. Medium to high sporulation on local varieties. Treatment with Ridomil MZ 72% and Mancozeb. Information received from R.A. MAHTABI, Tobacco Research Institute of Tirtash - Behshahr (Iran). May 13, 2003. Ref. 101
Bulgaria	May 2, 2003	June 4, 2003	Site: Manole Village (near Plovdiv). First outbreak of blue mould on Virginia tobacco seeklings at the 4-6 leaf stage. Medium to high sporulation on local spots. Treatment with Ridomil Gold 68 WP. Information received from Dr. Hristo BOZUKOV, Head of Plant Protection Dept., Tobacco and Tobacco Products Institute, Plovdiv (Bulgaria). June 5, 2003. Ref. 114
Germany	June 2, 2003	June 5, 2003	Outbreak of blue mould on burley tobacco in the field. Sporulation observed on several plants three weeks after transplanting. Tobacco treated with Acrobat Plus WG (9% Dimethomorph, 60% Mancozeb) and affected plants destroyed. Information received from Dr. N. BILLENKAMP / A. LENGERSDORF, Landesanstald fur Pflanzenbau Forcheim, Rheinstetten (Germany). June 5, 2003. Ref. 114
Germany	June 6, 2003	June 6, 2003	Blue mould outbreaks in the field. Treatment with Acrobat Plus and affected plots destroyed. Information received from Gunter HECHLER, Bundesverband deutscher Tabakpflanzer e.V., Speyer (Germany). June 16, 2003. Ref. 126
Tunisia	June 2, 2003	June 12, 2003	Site: Ain Draham, Tabarka, Nefza and Ghardimaou regions (Northern Tunisia). Light, localised outbreak on dark air-cured tobacco Variety 8-4/7-2 in the field (10 leaf stage), climatic conditions very favourable for blue mould. Treatment with Ridomil MZ 58. Information received from Hamadi YAHIAOUL, Regie Nationale des Tabacs et Allumettes - Tunis (Tunisia). June 16, 2003. Ref. 126
Germany	June 19, 2003	June 20, 2003	Site: Lower Saxony, northwest Germany. Outbreak of blue mould in the field. The blue mould originated on transplant seedlings supplied by a farmer in southwestern Germany where blue mould was first detected on 2 June (see Warning No. 04). Analysis results from the University of Hohenheim indicate that this blue mould strain is resistant to Metalaxyl. At present, the original contaimination source is unclear (i.e. hibernation of sporangiospores in Germany? Or wind distribution from other countries?). Information received from Dr. N. BILLENKAMP, Landesanstald fur Pflanzenbau Forcheim, Rheinstetten (Germany). June 23, 2003. Ref. 136
Germany	June 23, 2003	June 23, 2003	Site: Rheinland Pfalz, Wittlich. Blue mould outbreaks in the field (yound plants from Bad Krozinger). Tobacco treated with Forum (Dimethomorph) and parts of the affected plants destroyed. Information received from Gunter HECHLER, Bundesverband deutscher Tabakpflanzer e.V., Speyer (Germany). June 23, 2003. Ref. 136
Iran	June 9, 2003	June 23, 2003	Site: Amreh and Chahardangeh (Sari, Mazandaran Province), northern Iran. Blue mould outbreak with medium sporulation on tobacco in the field (growth stage 1 - after transplanting). Information received from R.A. MAHTABI, Tirtash Tobacco Research Institute, Gehshahr (Iran). June 23, 2003. Ref. 136
Germany	June 26, 2003	June 26, 2003	Site: Bavaria. Small sporadic blue mould outbreaks in the field. Tobacco treated with Forum plus (Dimethomorph). Information received from Gunter HECHLER, Bundesverband deutscher Tabakpflanzer e.V., Speyer (Germany). July 1, 2003. Ref. 145
Austria	June 26, 2003	July 1, 2003	Site: Gersdorf, Weiz District, Eastern Styria Province. Blue mould outbreak on 0,5 ha of burley tobacco in the field (6-8 leaf stage). Affected area imnmediately treated with Ridomil Gold MZ WG (0,25%). Information received from Ing. O. SCHOLLAUF, Ernahrungssicherheit Rohtrabak Osterreich GmbH and DI E. KURTZ, Osterrichische Agentur fur Gesuhndheit und Ernahrungssicherheit GmbH (Austria). July 1, 2003. Ref. 145
Germany	July 8, 2003	July 8, 2003	Site: Baden Wurttemberg, North Baden, South Palatinate. Further small blue mould outbreaks in the field. Tobacco treated with Dimethomorph and harvested. Information received from Gunter HECHLER, Bundesverband deutscher Tabakpflanzer e.V., Speyer (Germany). July 10, 2003. Ref. 161
Poland	July 14, 2003	July 17, 2003	Site: Cieszanow, southern Poland. Variety Wislica (FCV), growing stage 12 leaves. 4-6 leaves per plant with lesions, 8-12 lesions per leaf. Sprayed with Ridomil Gold 68 WP. Bottom leaves removed to improve ventilation. Total plot area of 1.2 ha with 2-3% infected. Estimated yield loss is insignificant. Information received from Tomasz BIERUT, Universal Leaf Tobacco (Poland). July 21, 2003. Ref. 168
France	July 18, 2003	July 22, 2003	Site: Berthen (Nord). Outbreak of blue mould on 200 tobacco plants at growing stage. Outbreak not systemic. Affected plants destroyed and total area treated with ACROBAT. Information received from the Service Achats, UCAPT / France Tabac (France). July 24, 2003. Ref. 172
Portugal	July 23, 2003	July 25, 2003	Site: Idanha / Ladoeiro / Beira Interior. Light outbreak of blue mould on tobacco variety As / 04 DF in the field (12 ha) at the early flowering stage. 25% of leaf surface affected. Low sporulation. Preventative treatment with Mancozeb + Metalaxyl. Control treatment with Ridomil MZ 72 immediately upon appearance of blue mould symptoms. Information received from Paulo ABRANTES, Agronomic Manager, Agrotab (Portugal). July 28, 2003. Ref. 173
Switzerland	July 22, 2003	July 28, 2003	Site: Thurgau Canton. Outbreak of blue mould on Virginia tobacco variety Golta, in well irrigated field. Affected plants destroyed and area treated with Ridomil Gold.. Information received from Daniel GINDRAT, Station Federale de Recherches en Production Vegetale de Changins (Switzerland). July 31, 2003. Ref. 177
France	July 29, 2003	July 30, 2003	Site: St. Genies (Dordogne). Outbreak of blue mould on 0.10 ha to tobacco variety BB16A after topping. Some sporulation on the lower levels of the plants (X + C). Treatment with Acylon at regrowth stage. Treatment with Maneb and Acylon TC after appearance of blue mould. Information received from the Service Achats, UCAPT / France Tabac (France). July 31, 2003. Ref. 177
Austria	July 30-31, 2003	August 1, 2003	Site: St. Florian, upper Austria. Second outbreak of blue mould in Austria. 1,4 ha of Burley tobacco affected at early flowering stage (6-8 of the lower leaves partly harvested). Two weeks ago, field was treated with Ridomil Gold MZ @P (Metalaxyl M [40 g.a.i.] + Mancozeb [640 g.a.i.] - 25%). Affected plants removed and destroyed and the field immediately treated with Ortiva (Azoxystrobin [250 g.a.i.] - 0.1%) and Dithance Neo Tec (Mancozeb [750 g.a.i.] - 0.05%). Information received from Ing. O. SCHOLLAUF, Ernahrungssicherheit Rohtrabak Osterreich GmbH and DI E. KURTZ, Osterrichische Agentur fur Gesuhndheit und Ernahrungssicherheit GmbH (Austria). August 6, 2003. Ref. 179
France	August 12, 2003	August 18, 2003	Site: Hostun (Drome). Outbreak of blue mould on 0.10 ha of Virginia tobacco variety ITB 33024 after topping. Some sporulation on lower levels of the plants (X + C). First treatment three weeks after transplanting and second treatment before topping. After blue mould outbreak, immediate treatment recommended. Information received from the Service Achats, UCAPT / France Tabac (France). August 20, 2003. Ref. 183

These reports are courtesy of CORESTA (Cooperation Centre for Scientific Research Relative to Tobacco).

Page last updated April 18, 2003.