100 Years Ago

摘要

My attention has been directed to three elm trees at Ettington ... which it is said have been "killed by wasps." It appears that the wasps were attracted by the sweetness of the sap, and attacked the trees in such swarms, and so drained them of sap, that the death of the trees seems imminent, all the leaves having gone yellow long before the usual time. I should be glad to know if others have noticed attacks on elm trees, and whether the averred sweetness of the sap is due to some previous degenerative change in the tissues of the tree, or whether wasps would attack a normal tree if they could get access to the sap.