This section is from the book "The Gardener's Monthly And Horticulturist V25", by Thomas Meehan. See also: Four-Season Harvest: Organic Vegetables from Your Home Garden All Year Long.
There are four specially destructive I have noticed within a few years back, and as I have prevented their ravages I will relate my experience for the benefit of others. The first is a smooth, pale-green worm, an inch and a half long, which I first found feeding upon the leaves of Mignonette and Sweet Alyssum, in small numbers. The hue depends somewhat on the color of the leaves it feeds upon. Another has destroyed thousands of acres of the late cabbage crop. Three years ago last fall I found the worms in vast numbers upon my cabbage plants. I syringed a portion with a strong solution of carbolic acid soap, with flowers of sulphur in it, and on the other portion dusted air-slacked lime. All the worms were killed.
One season I dosed the cabbages before the time for the appearance of the worms, and the plants were untouched by the pest that year: So by taking time by the forelock, I learned that " prevention is better than cure." The worms come in August; apply the cures early in that month. Last year I syringed with carbolic soap, with Paris green in it. All the worms were killed, and no second brood followed. [Dangerous. - Ed. G. M.] There is another worm which feeds upon the leaves of the quince, and still another, found upon the hop vine, both of which can be stopped from coming by syringing the leaves with the aforesaid mixture.
 
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