The science of horticulture. Including a practical system for the management of fruit trees, arranged on demonstrative physiological principles / illustrated by sketches, in twelve plates. With a commentary on the works of Bradley, Hitt, Miller, Forsyth, Knight, Kirwan, Sir Humphry Davy, and Mrs. Ibbotson. By Joseph Hayward.

  • Hayward, Joseph, active 1798-1824.
Date:
1818
Catalogue details

Licence: Public Domain Mark

Credit: The science of horticulture. Including a practical system for the management of fruit trees, arranged on demonstrative physiological principles / illustrated by sketches, in twelve plates. With a commentary on the works of Bradley, Hitt, Miller, Forsyth, Knight, Kirwan, Sir Humphry Davy, and Mrs. Ibbotson. By Joseph Hayward. Source: Wellcome Collection.

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    tecting and defending themselves against common annoyance. The egg in the first place is deposited so inti¬ mately with the embryo bud, that the existence of the one depends on the other, therefore liquids, applied in a natural manner, cannot reach them, and if more forcible means are used, the bud is more readily destroyed than the egg. When the insect bursts into life, it possesses the means of curling the leaf, or raising the sap in such a manner as to shield and protect itself, and a current of water or air, unless applied with a force sufficient to destroy the object of our care, the bud, it cannot be made effectual. But although water, smoke, or vapour, cannot be applied so as to come in contact with the in¬ sects, in their differently exposed haunts, a fine light powder, like drifted snow, will find its way into their most secluded retreats. Tobacco dried is poisonous to most insects, and is so obnoxious to the aphis, that whenever it comes in contaet with them, they immediately shift their quarters or die; and therefore tobacco in a fine dry powder, or common snuff, blown among the leaves, will find its way into every fold and corner, and by proper and repeated applica¬ tion, will seldom fail to effect a complete extir¬ pation. The best and most effectual mode of applying