Fifth report of the United States Entomological Commission, being a revised and enlarged edition of Bulletin no7, on insects injurious to forest and shade trees . e to junipers and arbor vitae. Fig. 299.—Mine of the juuiper bark-borer. Tliis insect was first noticed in Salina Packard del. in the snmmer and fall of 1884, attacking the junipers on the grounds of a number of the residents of the city. Thej werethen in great numbers, many trees having been entirely destroyed, and others badlyinjured. The damage was done entirely by the perfect beetle, no larvae having beenobserved. The iujury was
Fifth report of the United States Entomological Commission, being a revised and enlarged edition of Bulletin no7, on insects injurious to forest and shade trees . e to junipers and arbor vitae. Fig. 299.—Mine of the juuiper bark-borer. Tliis insect was first noticed in Salina Packard del. in the snmmer and fall of 1884, attacking the junipers on the grounds of a number of the residents of the city. Thej werethen in great numbers, many trees having been entirely destroyed, and others badlyinjured. The damage was done entirely by the perfect beetle, no larvae having beenobserved. The iujury was almost invariably confined to the base of the lateral off-shoots of the branches of the tree, the beetle burrowing under the bark, and eatingaround the base of the twig, causing its destruction. Every twig from the trunkoutward would be attacked, and a few burrows were also observed on the stems ortrunks of the trees themselves. No primary gallery of the perfect insect has beenfound to exceed three-quarters of an inch in length. I have found no secondary orlarval galleries. Packard, in his Insects Injurious to Forest and Shade Trees, says he has observed. 906 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. this insect as early as the Ist of May. I have never observed it making attacks earlier than the Ist of September, continuing until the latter part of October. The attacks of this insect are made on healthy trees, and I have seen no less thanfifteen cedars entirely killed in the public square of Clay Center, Kans., that wouldaverage six inches in diameter at the base. This Scolytid is not a native, but hasbeen introduced in cedar posts brought to the lumber-yards from Michigan and Ar-kansas. I have examined posts from Arkansas which contained the perfect beetle,(but dead), larvJB, and pupaj. When these pupae had completed their transforma-tions, cedars in close proximity to the lumber-yard were at once liable to attack. The primary gallery of this insect as examined in Arkans
Size: 1105px × 2261px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublisherwashingtongovtprin
