Walnut blight symptoms - Cost 873

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Results : Soil and management practices influence Huge differences of soil Soil characteristics Bouscarel Soursac % Clay 12,5 % 57,8 % % organic mater 1,28 % 3,26 % pH 6,57 8 CaO (g/kg) 1,41 9,19 CEC* Metson (Cmol+/kg) 3,7 22,45 * Cation Exchange Capacity Opposite management practices • Mature sheep manure brought every year since plantation on Soursac orchard • Mineral fertilization on Bouscarel orchard, • Soursac has never been spaying with chemicals in contrast with Bouscarel Influence on tree vigour < Orchard Trunk mean circumference (cm) Mean annual growth since plantation (cm) Bouscarel 91,85 ± 7,8 a + 6,1 a Soursac 72,8 ± 4,6 b + 5,6 b ‣ Less vigour = less sensitivity during growth => hardiest trees COST 873 – Costiera 2009 - Italy
Results : Trees’ phenolic compounds Dualex unit (quantitative) 3 2,5 *** *** 2 1,5 1 B ous carel S ours ac 0,5 0 Flavonoids P henolic c ompounds Hydroxycinnamic acids ‣ Higher concentration of flavonoids and HCA = better resistance towards WB ‣ Influence of soil and orchard management on phenolic compounds COST 873 – Costiera 2009 - Italy
Page 1 and 2: Factors influencing walnut blight s
Page 3 and 4: Context & Objectives WALNUT BLIGHT
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: Results : Soil moisture COST 873 -
Page 17 and 18: Questions WB Symptoms assessment:

Walnut blight symptoms - Cost 873

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