Insect pests of farm, garden and orchard . greatly enlarged. the midi-ibs of the green leaves. They aie mere specks, one-thirty-fifth inch long and oval in shape. In early winter as manyas sixty-five have been found on one leaf, but many fall off andare destroyed before spring. The eggs hatch early in April inDelaware, the exact time depending on the season. The youngaphides feed a little on the leaves bearing the eggs but soon findtheir way to the tender young leaves of the crown. These INSECTS INJURIOUS TO THE STRAWBERRY 443 aphides of the first generation beconu; full grown in twelve tofift
Insect pests of farm, garden and orchard . greatly enlarged. the midi-ibs of the green leaves. They aie mere specks, one-thirty-fifth inch long and oval in shape. In early winter as manyas sixty-five have been found on one leaf, but many fall off andare destroyed before spring. The eggs hatch early in April inDelaware, the exact time depending on the season. The youngaphides feed a little on the leaves bearing the eggs but soon findtheir way to the tender young leaves of the crown. These INSECTS INJURIOUS TO THE STRAWBERRY 443 aphides of the first generation beconu; full grown in twelve tofifteen clays. The adults soon conmience to give birth to youngaphides, bearing fifteen or twenty within a few days. All of the;aphides of this generation are females, as are all those of thesummer generations, the males appearing only in the fall. Theyoung of the second generation mature and reproduce in the samemanner and in about the same time as the first generation. Untilthe last of April but few ants are seen, but about that time they. Fi(i. 317.âEggs of strawberry root-louse on leaf stem. become active and carry the young aphides from the leavesdown to the roots, where a colony of a dozen or more is establishedon each plant. No aphides are found on the roots until the antsappear, and they are entirely responsible for the aphides infestingthe roots. The ants continue to care for the aphides during thesummer, carrying them to new plants when they become over-crowded or the plant dies, and so are responsible for the spreadof the pest. The first generations are entirely wingless, but whenthe third generation matures a large number are winged. These 444 INSECT PESTS OF FARM, GARDEN AND ORCHARD wiiigctl females nvv ooiniiiuii in lale May and early June, Theirbodies are somewhat smaller than those of the wingless forms,and appear to be shiny black, though really a deep green. Thewings expand about one-sixth inch, slightly over three times thelength of the body. They arc also carri
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcet, bookyear1912
