. Injurious insects : how to recognize and control them . Insect pests; Insect pests. BORIXG BENEATH BAKK OF TRUNK OR LIMB 241 Where borers :ire present, cut them out with a laiife, or probe the burrows with a soft copper wire. Kuife wounds should be painted with white lead. The Shot Hole Borer {Eccoptogastcr (Scohjlus) rugidosusKAtz.) Phmi, pear, apple, peach, and cherry are attacked by this tiny insect. The outward c\'idence of injury is seen in numerous round holes in the bark, each hole clean-cut, about one sixteenth of an inch in diameter, as if the trunk or limb had received a charge of
. Injurious insects : how to recognize and control them . Insect pests; Insect pests. BORIXG BENEATH BAKK OF TRUNK OR LIMB 241 Where borers :ire present, cut them out with a laiife, or probe the burrows with a soft copper wire. Kuife wounds should be painted with white lead. The Shot Hole Borer {Eccoptogastcr (Scohjlus) rugidosusKAtz.) Phmi, pear, apple, peach, and cherry are attacked by this tiny insect. The outward c\'idence of injury is seen in numerous round holes in the bark, each hole clean-cut, about one sixteenth of an inch in diameter, as if the trunk or limb had received a charge of bird shot. As a rule only trees are attacked that have been weakened from some cause or other. If a piece of bark is removed where the holes are numerous, shallow galleries wiW be found beneath. These are of char- acteristic form. A central gallery, one or two inches long, runs parallel with the of the trunlv or Umb, while from this many other galleries di- verge, quite small at the start but growing rapidly larger. A small, dark beetle makes the main gallery as its brood chamber, laying its eggs in pockets along each side. Grubs hatch from these, bore the diverging chan- nels as they grow, and finally come out as adult beetles, cutting round emergence holes tln-ough the bark. In northern sections there are two generations each year; in the South there are tlu'ee. To control, remove and burn dead or dying trees in which the insect is breeding in large nmnbers. They will invariably spread from these. Fig. 313.— Burrows of tho Shot Hole Borer, diselosed by removal of bark. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original O'Kane, Walter Collins, b. 1877. New York : The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1912
