Winter Wonderland of Pests and Diseases Dr Suzanne Sancisi-Frey - PowerPoint PPT Presentation

Winter Wonderland of Pests and Diseases Dr Suzanne Sancisi-Frey Funded by the EU’s LIFE programme

Lucy Turner Winter Wonderland of Pests and Diseases Dr Ana Perez-Sierra Dr Suzanne Sancisi-Frey Funded by the EU’s LIFE programme

Gypsy moth Hosts 1. Sweet chestnut 2. Ash 3. Oak 4. Plane 5. Pines Pine sawfly 6. Cedars 7. Spruces 8. Lawsons cypress 9. Juniper Funded by the EU’s LIFE programme

Winter Signs and Symptoms on Sweet Chestnut 1. Chestnut blight ( Cryphonectria parasitica) • Bark lesions/cankers • Fruiting bodies • Discoloured bark • Epicormic shoots Stephen Middleton Funded by the EU’s LIFE programme

Winter Signs and Symptoms on Sweet Chestnut Funded by the EU’s LIFE programme

Funded by the EU’s LIFE programme

Funded by the EU’s LIFE programme

Winter Signs and Symptoms on Sweet Chestnut 2. Phytophthora ramorum • Epicormic shoots • Retained leaves? • Bleeds on bark • Branch dieback Funded by the EU’s LIFE programme

Winter Signs and Symptoms on Sweet Chestnut 3. Oriental chestnut gall wasp FC Tree Health Team • Retained leaves • Distorted leaves • Woody galls Funded by the EU’s LIFE programme

Misshapen leaves and galls on sweet chestnut in summer Stephen Middleton Funded by the EU’s LIFE programme

Chestnut blight P. ramorum OCGW Misshapen leaves and galls on sweet chestnut in winter FC Tree Health Team Funded by the EU’s LIFE programme

Winter Signs and Symptoms on Oak Holm 1. Oak processionary moth ( Thaumetopoea processionea) Native • Old nests Turkey • Egg plaques 30 m tall Funded by the EU’s LIFE programme

An old oak processionary moth nest and silk trail Funded by the EU’s LIFE programme

Human Health Hazard Funded by the EU’s LIFE programme

Egg Plaques (approx. 20 mm long) of the oak processionary moth End of summer to following spring Photo Ralph Parks and FR Funded by the EU’s LIFE programme

Winter Signs and Symptoms on Oak 2. Acute oak decline • Old bleed stains • Exit holes • Branch dieback in the Misshapen leaves and galls crown on sweet chestnut in winter Funded by the EU’s LIFE programme

Funded by the EU’s LIFE programme

OPM AOD Funded by the EU’s LIFE programme

Winter Signs and Symptoms on Ash Trees 1. Ash dieback ( Hymenoscyphus fraxineus) • Bark lesions/cankers • Discoloured bark Funded by the EU’s LIFE programme

Bark lesions Fresh lesions Old lesions ( • Stem lesions develop from Oct though to spring • Around insertion points Funded by the EU’s LIFE programme