. Eastern forest insects. Forest insects. ⢠; >⢠*â¢- - I. ; ,:«^v^ iV 9 | f â v]l f COURTESY OF DUKE UNIV. SCH. OF FOREST. Figure 95.âGallery of Ips calli- graphus on limb of a shortleaf pine. COURTESY OF DUKE UNIV. SCH. OF FOREST. Figure 96.âGallery of Ips grandi- collis, the southern pine en- graver, on limb of loblolly pine. Note egg niches and incompleted larval mines. portions of the trunks by other species of Ips. Adults are attracted to freshly-cut and injured trees. Any disturbance that causes pitch flow may induce attack. Apparently healthy trees are also attacked occasionally.
. Eastern forest insects. Forest insects. ⢠; >⢠*â¢- - I. ; ,:«^v^ iV 9 | f â v]l f COURTESY OF DUKE UNIV. SCH. OF FOREST. Figure 95.âGallery of Ips calli- graphus on limb of a shortleaf pine. COURTESY OF DUKE UNIV. SCH. OF FOREST. Figure 96.âGallery of Ips grandi- collis, the southern pine en- graver, on limb of loblolly pine. Note egg niches and incompleted larval mines. portions of the trunks by other species of Ips. Adults are attracted to freshly-cut and injured trees. Any disturbance that causes pitch flow may induce attack. Apparently healthy trees are also attacked occasionally. Spot-killing occurs at times among pines showing no evidence of previous injury or decreased vitality. 261. 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 Baker, Whiteford L. (Whiteford Lee), 1903-. Washington : U. S. Dept. of Agriculture, Forest Service ; for sale by the Supt. of Docs. , U. S. G. P. O
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectforestinsects
