OCR Text |
Show Peach Aphis Emigrates to Herbaceous Plants With the exception of the black peach aphis, all the species migrate from the fruit trees in late spring and early summer to various herbaceous plants. They return to the foliage of the trees in autumn. The black peach aphis feeds chiefly on the bark of sprouts and on the smaller branches of peach trees. The plum-thistle aphis feeds on the under surfaces of the leaves and on the green tips of branches. The other species confine their attack to the leaves which frequently fre-quently are severely curled. Many of the Injured leaves may fall from the trees in cases of pronounced Infestation. |