The only enemy of Carrots which, in my experience, is a perpetual source of serious danger, is the maggot of the Carrot fly, Psila Rosae. This pest almost ruins the Carrot crop in some instances. There is no reason why it should be allowed to destroy so much as a single Carrot, and the method of prevention is purely cultural. The fly lays her eggs in the loose soil round the crowns of the young Carrots, and if the soil is kept close and firm from the first she cannot effect an entrance. I have acted on the principle here involved with perfect and complete success for several years in a garden formerly very badly infested by the Carrot maggot. If Carrots are not thinned until they are half grown there is a considerable disturbance of the soil, and if care is not taken to close up the soil round the plants left in the rows the fly has matters all her own way. A rough thinning of Carrots should be done when they are only 1 inch high, and the soil then patted down along both sides of the rows with the back of a rake. The second thinning should be done when the roots removed are the size of long Radishes, and consequently nice for cooking. The soil should be firmed as before. To make assurance doubly sure, 1 gallon of gas liquor may be bought at the gasworks, diluted with 6 gallons of water, and poured between the rows. This treatment secures splendid Carrots and no maggots.