Posted on September 12, 2021
Galls smother the undersides of oak leaves this September in and around Charlton Down and further afield. The oaks in the Nature Reserve and in the grounds on the south side of Greenwood House are affected. The galls are common and I have often seen them in other years too. The exact shape is dictated by the type of wasp that has laid its eggs in the leaf. The ones like small rough brown discs with a raised centre are Spangle Galls made by the Cynipid wasp Neuroterus quercusbaccarum. The small round golden galls with a depressed centre, a donut-shape of silk threads, are made by the wasp Neuroterus nimismalis. Some leaves have both species of gall.
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Posted on May 24, 2021
The village has many magnificent mature Lime trees, and also smaller younger ones. Their lime green heart-shaped leaves freshly opened are a delight to see, whether in the full sun of the day or the gentle evening light. They are sometimes be-decked with strange bright red growths. These are Nail Galls, a characteristic reaction of the leaf to an invasion by small mites called Eriophyes tiliae which only live in leaves of this type.