Funghi e fungicidi; un manuale pratico, relativo alle malattie fungine delle piante coltivate e ai mezzi per prevenirne le devastazioni . FIG. 34. SPRAYIXG PER FOGLIE DI PRUGNA-BT.IGHT. La Plum Leaf=Rust Puccinia j^^uni-spinoscBThis è una malattia un po 'simile all'ultima.Foglie colpite da esso si macchiano con rossastro sopra, e giallastro-marrone sotto, e quando l'attacco è se-vere gli alberi possono essere defogliati. Il trattamento correttivo è lo stesso di quello per la leaf-bllight. Funghi CHE COLPISCONO LA CILIEGIA il Rot marrone Monilia fruttigena Come indicato a pagina 56, dove questa malattia è discussa nei suoi relati

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Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . FIG. 34. SPRAYIXG FOR PLUM LEAF-BT.IGHT. The Plum Leaf=rust Puccinia j^^uni-spinoscBThis is a disease somewhat similar to the last.Leaves affected by it become spotted with reddish above, and yellowish-brown below, and when the attack is se-vere the trees may be defoliated. The remedial treat-ment is the same as for the leaf-blight. FUNGI AFFECTING THE CHERRY The Brown Rot Monilia fructigena As stated on page 56, where this disease is discussed in its relations to the plum, it frequently attacks cher-ries, as well as jDlums andpeaches. Its life-history onthe cherry does not differmaterially from that on the]3lum, although it usuallydoes not pass from fruit tofruit so often on the cherry, because the individual fruitsdo not touch each other somuch. Fig. 35 represents asound ripe cherry, togetherwith one mummiiied by thisdisease.. FIG. 35. DISEASED AND SOUNDCHERRY. The Black Knot Plowrightia morhosaThis disease is often as destructive to cherries as toplums, under which it has already been discussedQop. 53-55). The account of its life-history and themeans of exterminating it there given applies with equalforce when it affects the present fruit. The fungus which causes plum leaf-blight alsoattacks the cherry, and frequently does great injury. 66 FUNGI AFFECTING THE PEACH The Peach Leaf=curl Taphrina deformans It often happens that in spring, soon after theleaves begin to expand, the foliage of peach trees be-comes curled and misshapen. Theleaves are usually thickened anddiscolored, and fall off in a shorttime. All the branches may beattacked, or the injury may beconfined to only a part of the tree.AYhen the disease is severe theyoung fruits fall off, and the cropfor the year is destroyed. Thedefoliated trees soon push out auew set of leaves, but too late torepair the damage done to thefruit crop. This leaf-curl

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1890
• booksubjectpathoge
• bookyear1896