. Insetti dannosi per la frutta. Illustrato con quattro cento e quaranta legno-tagli. Pesti di insetto. Attaccare i rami. 37 uova sono state così depositato, l'insetto ritira il suo piercer per un attimo e poi lo inserisce di nuovo e scende due uova più in linea con il primo, e così via fino a che ella ha riempito la fessura da una estremità all'altra. Lei rimuove quindi per un po' di dis- tanza e rende un altro simile nido: non è raro trovare da quindici a venti di tali fessure nello stesso arto. La cicala passa così da arto arto e da albero ad albero fino a quando il suo negozio di quattro o cinque hund

• Collaboratore: Central Historic Books / Alamy Foto Stock
• ID dell’immagine: PFXEBN
• Dimensioni dei file: 7,2 MB (243,4 KB Download compresso)
• Liberatorie: Modello - no | Proprietà - no
• Dimensioni: 2288 x 1093 px | 38,7 x 18,5 cm | 15,3 x 7,3 inches | 150dpi

Altre informazioni

Questa foto è un'immagine di pubblico dominio, il che significa che il copyright è scaduto o che il titolare del copyright ha rinunciato a tale diritto. Alamy addebita un costo per l'accesso alla copia ad alta risoluzione dell'immagine.

Questa immagine potrebbe avere delle imperfezioni perché è storica o di reportage.

. Insects injurious to fruits. Illustrated with four hundred and forty wood-cuts. Insect pests. ATTACKING THE BRANCHES. 37 eggs have thus been deposited, the insect withdraws her piercer for a moment, and then inserts it again and drops two more eggs in a line with the first, and so on until she has filled the slit from one end to the other. She then removes to a little dis- tance and makes another similar nest: it is not uncommon to find from fifteen to twenty of such fissures in the same limb. The cicada thus passes from limb to limb and from tree to tree until her store of four or five hundred eggs is exhausted, when, worn out by her excessive labors, she dies. The punctured twigs are so weakened by the operations of the insect that they frequently break off when swayed by rough winds, and the injury thus caused to young fruit-trees in orchards or nurseries is sometimes very serious; in most in- stances, however, if the trees are vigorous, they eventually recover from their wounds. The eggs hatch in about six weeks or less, the young larva being of a yellowish-white color, and appearing as shown in Fig. 25. It is active and rapid in its movements, and shortly after its escape from the ^gg drops to the ground, and immediately proceeds to bury itself in the soil by means of its broad and strong fore feet, which are admirably adapted for digging. Once under the surface, these larvae attach themselves to the succulent roots of plants and trees, and, puncturing them with their beaks, imbibe the vegetable juices, which form their sole nourishment. They do not usually descend very deeply into the ground, but remain where juicy roots are most abundant, and the only marked alteration to which they are subject during the long period of their existence under ground is a gradual increase in size. As the time for their transformation approaches, they as- cend towards the surface, making cylindrical burrows about five-eighths of an inch in diameter, often circuitous, seldom. P

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1880
• bookpublisherphila
• bookyear1883