One of the worst enemies to the celery is a small fly, which deposits its eggs in the leaves, and the young eat their way under the skin, and in this way materially affect the growth of the plant, The English Gardener's Chronicle says: - "I can fully concur with what has been stated by Mr. Tillery as regards soot being beneficial to the growth of Celery and also a preventive to the celery fly (Tephri tis onopordinis), having experimented with the same with satisfactory results, though instead of selecting a fine day for the operation I selected a showery one. I intended to have written to you before on this subject, as I consider it an easy remedy and of great importance where fine heads of celery are in requisition."