The numerous species of aphides under the name of " blight" are, as is well known, most troublesome enemies to all fruit trees in the open air: one regrets that orchard-house trees are not exempt from their visitations. Bach species of fruit tree seems to have its peculiar aphis. There are, however, two which attack the peach and nectarine; the brown aphis, which often makes its appearance on the young shoots and buds in November and December, and the green, which generally attacks the trees as soon as the fruit is set on the young leaves unfolded. These are easily destroyed by tobacco-water, made by infusing two ounces of tobacco in a quart of boiling water, and applying it when cool with a middle-sized painter's brush in the following manner: - With the left hand place a piece of slate or glass against the shoot, so that it rests against it, and then dip the brush in the water and brush upwards: if the first application does not kill them, it must be repeated.

This will destroy all the tribe, even the hard-to-be-killed blue aphis, peculiar to the plum, and the black which, so often infests the cherry.

Another mode of destroying them is by fumigation, which is the most eligible when a large number of trees are infested. This is best done in the evening, and most economically with tobacco. The next morning the trees should be syringed with all the force possible, by applying the syringe close to each. Another mode of fumigation (and this is convenient when only a tree or two are infested) is, to envelope the tree in tiffany or thin calico, and then place under it a small pot of ignited tobacco paper. In all cases the dead and dying insects should be washed off with the syringe. "Sigma's Aphis Powder," sold by Mr. Powell, Ticehurst, Sussex, is also a convenient and efficient aphis destroyer: this is best applied, by a dredging* box with a muslin cover, to the under surface of the leaves; it should be suffered to rest upon the leaves for eight or ten hours, and then be washed off with the syringe.

In the orchard-house culture of peaches and nectarines, syringing must play an important part; for the red spider is so fond of their leaves, that, like Sindbad's Old Man of the Sea, he will stick closely, and cannot be dislodged without applying the syringe close to the under surface of the leaves. If this pest be suffered to make the least progress, the flavour of the fruit will be entirely destroyed. A small pocket lens, in the hand of the amateur, will be the best instrument to discern it; looking closely at the under surface of the leaves, if it be there, a small bright-red speck, like a red grain of sand, will be seen. The experienced gardener does not look for them. One glance at the upper surface of those leaves, which show some minute yellowish specks, is quite enough for him. If, therefore, the least sign be apparent, continue the regular syringing, even till the fruit is ripe; otherwise, syringing may be discontinued, when the peaches and nectarines commence to soften, preparatory to ripening.

A very excellent mode of using sulphur has just been given in the "Gardener's Chronicle," No. 1, p. 5, by Mr. Gardener, of Rossall Hall, Fleetwood. "The house being shut up quite close in the evening, some large flower pots (say 13-inch pots) were half filled with fresh unslaked lime: this was sprinkled with water, and a handful of sulphur strewed over it, and suffered to remain all night. The next morning the house was syringed till quite saturated." This will not only destroy the red spider, but also the mildew on vines, and is, in my opinion, one of the best remedies ever discovered. As prevention is better than cure, I advise all lovers of orchard houses and vineries to apply it once a week through June and July. I am inclined to think that this simple remedy will do away with the necessity of the constant syringing I have recommended; and if so, the fruit will be improved in flavour. It is at any rate quite worthy of a trial.