Grubs on orchard trees, and gooseberry and currant bushes, will
sometimes be sufficiently numerous to spoil a crop; but if a bonfire
be made with dry sticks and weeds on the windward side of the orchard,
so that the smoke may blow among the trees, you will destroy
thousands; for the grubs have such an objection to smoke, that very
little of it makes them roll themselves up and fall off: they must be
swept up afterwards and destroyed.