Walnut blight symptoms - Cost 873
Walnut blight symptoms - Cost 873 Walnut blight symptoms - Cost 873
Creysse Experimental Station South-western Walnut production area COST 873 – Costiera 2009 - Italy
Context & Objectives WALNUT BLIGHT 1 st disease of walnut trees in France Up to 50 % losses by walnuts drops Caused by Xanthomonas arboricola pv. Juglandis (Xaj) Copper = only allowed product to fight the disease. BUT : low efficacy Huge variability of sensitivity to walnut blight observed between orchards of a same cultivar Lack of knowledge on this disease QUESTIONS & GOALS Link between Xaj populations / phenological stages of walnut trees / climate / walnut blight symptoms development Does fungus play a role in blight symptoms Identify and understand factors that affect the sensitivity of trees to walnut blight COST 873 – Costiera 2009 - Italy
- Page 1: Factors influencing walnut blight s
- Page 5 and 6: Materials & Methods 20 trees / orch
- Page 7 and 8: Results : Xaj epidemiology log (cfu
- Page 9 and 10: Results : Fungi ‣ Complex: Altern
- Page 11 and 12: Results : Climate influence NS * NS
- Page 13 and 14: Results : Soil moisture COST 873 -
- Page 15 and 16: Results : Trees’ phenolic compoun
- Page 17 and 18: Questions WB Symptoms assessment:
Creysse Experimental Station<br />
South-western<br />
<strong>Walnut</strong><br />
production<br />
area<br />
COST <strong>873</strong> – <strong>Cost</strong>iera 2009 - Italy
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