. L'enciclopedia di pratica orticoltura; un sistema di riferimento di orticoltura commerciale, coprendo la pratica scientifica e fasi di orticoltura, con speciale riferimento alla frutta e verdura;. Il giardinaggio; frutta-cultura; giardinaggio di vegetale. PEACH PARASSITI 1569 e avente un'ala distesa di circa ^2 pollici. È molto bello con il suo oscuro- grigio, ali sfrangiate. Essi sono molto raramente visto in frutteti dai coltivatori di frutta, a causa della loro piccola dimensione e la loro stretta somiglianza alle proiezioni della corteccia e la loro abitudine di appoggio perfettamente ancora durante le ore diurne. Il uovo.-Uova di questo

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. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. PEACH PESTS 1569 and having a wing expanse of about ^2 inch. It is quite beautiful with its dark- gray, fringed wings. They are very seldom seen in the orchards by the fruit growers, because of their small size, their close resemblance to projections of the bark and their habit of resting perfectly still during the daytime. The Egg.—Eggs of this insect were first found by Marlatt, who kept the moths in confinement and found that they were deposited above the bases of the petioles of the leaves. Clarke found the eggs of the first brood in the orchard in the same location as described by Marlatt. He found, however, that the eggs of the second generation were laid not on the twigs, but on the fruit and in the edge of the stem-end depression; the eggs of the third generation were found in cracks of the bark, or exposed on its surface just above the crotches formed by the new wood and on the old wood. The eggs are pearly white, changing to a deep yellow before hatching. They are quite conspicuous, being about 2/5 of a millimeter (1/60 of an inch) in length by 1/5 millimeter in breadth. These observations of the egg and egg- laying habits of the insect made in Cal- ifornia by Mr. Clarke, are very interest- ing, as they are the first recorded from studies made under the natural condi- tions of the orchard. Remedies.—Experiments conducted by the writer in Colorado during the sea- sons of 1910 and 1911, and by Clarke in California, indicate that commercial lime and sulphur, used at the strentgh of 1 gallon to 10 of water, is an effective rem- edy for this pest. We have used it suc- cessfully both in the fall and spring. Earlier experiments conducted in this state by E. P. Taylor indicated that ar- senate of lead used at the

Parole chiave associate all'immagine

• bookcentury1900
• booksubjectfruitculture
• booksubjectgardening