Walnut blight symptoms - Cost 873
Walnut blight symptoms - Cost 873
Walnut blight symptoms - Cost 873
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Context & Objectives<br />
WALNUT BLIGHT<br />
1 st disease of walnut trees in France<br />
Up to 50 % losses by walnuts drops<br />
Caused by Xanthomonas arboricola pv. Juglandis (Xaj)<br />
Copper = only allowed product to fight the disease. BUT : low efficacy<br />
Huge variability of sensitivity to walnut <strong>blight</strong> observed between<br />
orchards of a same cultivar<br />
Lack of knowledge on this disease<br />
QUESTIONS & GOALS<br />
Link between Xaj populations / phenological stages of walnut trees /<br />
climate / walnut <strong>blight</strong> <strong>symptoms</strong> development<br />
Does fungus play a role in <strong>blight</strong> <strong>symptoms</strong> <br />
Identify and understand factors that affect the sensitivity of trees to<br />
walnut <strong>blight</strong><br />
COST <strong>873</strong> – <strong>Cost</strong>iera 2009 - Italy
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