. Il libro del giardino. Il giardinaggio. 824 OPEN fiore-giardino. Il pine-apple scala (Coccus bromelice) infests che frutta sotto male la coltivazione. Aspidiotus echinocacti (Bouche.)-La femmina molto simile a A. nerii, solo che lo schermo è più oblunga, e di un colore più scuro; il maschio è oi^ange o giallo, la pupa lineare, in polvere con il grigio, e doppiamente solcato. Come implica il nome, si è trovato sul echino- cactus, e anche sulla maggior parte delle altre del cactus tribù. Come si accoccola tra le spine e nella profonda angoli delle piante, la sua distruzione è difficile. I fumi di un focolaio di stabile

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. The book of the garden. Gardening. 824 OPEN FLOWER-GARDEN. The pine-apple scale (Coccus bromelice) infests that fruit under bad cultivation. Aspidiotus echinocacti (Bouche.)—The female very much resembles A. nerii, only that the shield is more oblong, and of a darker colour; the male is oi^ange or yellow, the pupa linear, powdered with grey, and doubly furrowed. As the name implies, it is found on the Echino- cactus, and also on most other of the Cactus tribe. As it nestles amongst the spines and in the deep angles of the plants, its destruction is difficult. The fumes of a hotbed of stable manure in a high state of fermentation is the only means we have found of destroying them, while in such an atmosphere most of the Cacti luxuriate during their growing season. The small brown scale (Aspidiotus proteus), fig. 268, had escaped the notice of entomologists Fig. 268.. SMALL BROWN SCALE. until about 1843, when it was detected and de- scribed by the writer of the entomological articles in the early numbers of the " Gardeners' Chronicle." It is said to be very abundant in plant-houses, and was first discovered on the leaves of aloes and amaryllises. It belongs to the second section above noticed, and is named proteus, from the variety of forms it assumes. In regard to the destruction of the scale insects in general, the late T. A. Knight tried a dressing of lime and flour of sulphur with beneficial effects. The brown limpet scale (Coccus patellceformis) is described as being the largest of the family that infests our plant-houses. It is, however, fortunately not very often met with; it is nearly allied to C. hesperidum, but is larger and of greater length. The females are in general found with their heads downwards, and vary very considerably in size and form, some being oval, others more elliptical, while some are slightly curved. The turtle scale (Coccus testudo), fig. 269, is found chiefly on tropical plants requiring a high temperature. The scale is ova

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1850
• booksubjectgardening
• bookyear18