This section is from the book "Commercial Gardening Vol3", by John Weathers (the Editor). Also available from Amazon: Commercial Gardening, A Practical & Scientific Treatise For Market Gardeners.
Winter Moth (Cheimatobia brumata), March Moth (Anisopteryx cescularia), Yellow Leaf Hopper (Chlorita viridula), Plum-fruit Sawfly (Hoplocampa fulvicornis), the Hop Damson Aphis (Phorodon humuli, var. malaheb).
The Aphis on Damsons may easily be controlled by spraying in February with lime and salt, and later with soft soap and quassia. It leaves the Damsons from the middle of May on to June and flies to the Hops, returning to the Damsons in autumn. [f. v. T.]