. Manual of fruit insects. Fig. 160. — Apple leaf-aphis,apterous viviparous Fig. 161. — Apple leaf-aphis, winged viviparous female, third generation. the rosy apple aphis, the leaves often being curled very 1907 it was so numerous in many large, bearing orchards inNew York that it swarmed on to the young fruits in June,checked their growth, prevented the normal June drop, and gave APPLE INSECTS 149 them a knotty appearance, thus ruining them for dwarfed by aphis injury usually present a characteristicpuckered condition at the blossom end (Fig. 159). The rosyappl
. Manual of fruit insects. Fig. 160. — Apple leaf-aphis,apterous viviparous Fig. 161. — Apple leaf-aphis, winged viviparous female, third generation. the rosy apple aphis, the leaves often being curled very 1907 it was so numerous in many large, bearing orchards inNew York that it swarmed on to the young fruits in June,checked their growth, prevented the normal June drop, and gave APPLE INSECTS 149 them a knotty appearance, thus ruining them for dwarfed by aphis injury usually present a characteristicpuckered condition at the blossom end (Fig. 159). The rosyapple aphis also helped in this destructive and unusual outbreak. ReferencesN. J. Agr. Exp. Sta. Bull. 143. Agr. Exp. Sta. 13th Kept., pp. 130-136. S. Bur. Ent. Circ. 81. Agr. Exp. Sta. Bull. 133, pp. 23-28. 1908. The Rosy Apple AphisAphis sorbi Kaltenbach (Aphis malifolioB Fitch) This species is now widespread and common throughoutthe United States and Canada. It is probably an old Europeanspecies which was introduced into America more than half acentur
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