. 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. Fig. 1. Agenti di campo con 300 libbre di Coccinelle in sacchi a un pack stazione ferroviaria. I sacchi sono riempito solo per metà per consentire i coleotteri per spostare leggermente e per evitare la frantumazione quando imballate sul dorso di muli. Crivelli, pentole, spazzole e sacchi utilizzati per questa raccolta sono appesa alla recinzione. Fig. 2. Il Vedalia (Novius cardinalis Muls). Leggermente meno di uno

• Collaboratore: Central Historic Books / Alamy Foto Stock
• ID dell’immagine: PFXK6T
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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. Fig. 1. Field Agents with 300 Pounds of Ladybirds in sacks at a pack train station. Sacks are only half filled to allow the beetles to move slightly and to avoid crushing when packed on the mules. Sieves, pans, brushes and sacks used for this collecting are hanging on the fence. Fig. 2. The Vedalia (Novius cardinalis Muls). Slightly less than one-quarter of an inch in length and oval in shape. The color pat- tern is very pronounced and striking, being red and black. In the females red predomi- nates while in the males there is more black. The larvae are often over one-half of an inch long and lead-gray in color with reddish sides. They are often covered with whitish nowder from the e^s sacs of the cottony cushion scale. The eggs are a little larger than those of Novius koebelei, but are the same color and laid in similar places. The young feed upon the eggs and young scales and do great execution. The great prolificness and appetite of this species enables it to do what no other predator has yet done. It disappears with the host and is constantly being sent out by the State Insectary. Introduced in California by Al- bert Koebele. It feeds entirely upon the eggs and young of the cottony cushion scale (Icerj/a purchasi). To this beetle is ac- credited the salvation of the citrus industry in California, which was threatened with destruction by the above scale. To this part of the work too much care cannot be given, as the suG<3ess or failure of the entire undertaking hinges on the careful segregation of the species at this point. To successfully establish an introduced species, several additional importations must be made and adults liberated as in many species if but a single introduction is made, in-breeding after a

Parole chiave associate all'immagine

• bookcentury1900
• booksubjectfruitculture
• booksubjectgardening