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Observatree meet up at Osterley led by Matt Parratt
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Elm Zigzag Sawfly trace - Osterley
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Looking at the earliest signs of Horse-chestnut leaf miner - Osterley
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Speckled Wood on Sweet Chestnut leaf - Osterley
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Looking at the edge of the Chestnut Blight infection - Osterley
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Taking a Chestnut Blight bark sample - Osterley
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Chestnut Blight bark sample taken - Osterley
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Observatree group around Chestnut Blight affected tree - Osterley
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Almond Tree with Peach Leaf Curl
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A walk in the park - Osterley
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Demonstrating - Osterley
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Under a sick Sycamore
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Oriental Chestnut Gall Wasp symptoms (2) - Osterley
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Oriental Chestnut Gall Wasp symptoms - Osterley
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OPM caterpillars at Osterley Park (2)
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OPM caterpillars at Osterley Park