. Bulletin. Natural history; Natural history. The Pla>t Lice, oh Aphiidae, ok Illinois 137 Of course, the physiological nature of the various species plays an important part in their distribution and abundance. It must not be forgotten, however, that the plant lice have developed after the plants and have had to fit into a flora! pattern probably previously and cer- tainly independently determined. The tamarack of our northern bogs would continue to live, conditions being favorable for its existence, without its ai)hid, Ciiiara laricis ( Hartigj ( Fig. 13), but since the aphid has become re
. Bulletin. Natural history; Natural history. The Pla>t Lice, oh Aphiidae, ok Illinois 137 Of course, the physiological nature of the various species plays an important part in their distribution and abundance. It must not be forgotten, however, that the plant lice have developed after the plants and have had to fit into a flora! pattern probably previously and cer- tainly independently determined. The tamarack of our northern bogs would continue to live, conditions being favorable for its existence, without its ai)hid, Ciiiara laricis ( Hartigj ( Fig. 13), but since the aphid has become restricted to this one host it could not survive without the tamarack. Where the physiological make-tip of a species of aphid in. Pig. 12. (Left) Distribution of Cinara laricis (Hartig) and its host, the tamarack, Larix lariciiia. Fig. 13. (Right) Distribution ot Ptii/lhtphis fagi (L.) and its host, the beech, Far/us grandifoUa. Illinois has tightly tied it up with a single species of host plant, or several very closely related host plants, that aphid obviously exists only where its host is present. Many examples of the primary factor of host distribution governing the distribution of nic)n()])hagnus plant lice in Illinois could be cited (Figs. ]()-1.'i). There is ample evidence to show that the {)hysiological constitution of an a])hid has limits, secondary to the ])resence of host plant nr host plants, which regulate the outlines of a full and com])lete picture of. 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 Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
Size: 1700px × 1470px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
