. Annual report. Entomological Society of Ontario; Insect pests; Insects. 62 THE REPORT OF THE [19. Fig49. Larch Saw-Fly. (a), the saw-fly with wings outspread; (6), the brown pupa case; (c) terminal twig of larch showing eggs in slits made by the female saw-fly. ~ • On June 10th the larch grove was sprayed with Paris Green (| lb. to the barrel)i but as this solution was rather weak, and as'many of the trees towards the centre of the grove could not be thoroughly sprayed, or even sprayed at all, the trees were found to be still infested three weeks later. The lar\fe giow| repidly, and at matur
. Annual report. Entomological Society of Ontario; Insect pests; Insects. 62 THE REPORT OF THE [19. Fig49. Larch Saw-Fly. (a), the saw-fly with wings outspread; (6), the brown pupa case; (c) terminal twig of larch showing eggs in slits made by the female saw-fly. ~ • On June 10th the larch grove was sprayed with Paris Green (| lb. to the barrel)i but as this solution was rather weak, and as'many of the trees towards the centre of the grove could not be thoroughly sprayed, or even sprayed at all, the trees were found to be still infested three weeks later. The lar\fe giow| repidly, and at maturity are nearly one inch in leDgth. The de- foliation "of the larger trees near the centre of the grove was almost complete. On July 20th no larvae could be found ; those that had survived the Paris Green had descended to the ground, and pupated. The oval, spindle-shaped pupte (Fig. 9 b) could be found quite abundantly under the trees among the litter of leaves. These re- main in thegrcund all winter, and the adults will emerge about the end of May. References : 121. 1844. Ratzeburg—Forest Insects- 1881. Hagen—Can. Ent.— p. 37. 1883. Fyles—An. Rep. Ent. Soc. Ont.—p. 17. 1884. Fletcher—An. Rep. Ent. Soc. Ont.—pp. 72, 77. " Harriugton— " p. " Fletcher—Oan. Ent., Nov. " Fyles—Can. Ent., Nov. 1885. Fyles—An. Rep. Ent. Soc. Ont.—p. 12. 1886. Jack— " p, 16. 1887. Lintner— « p. 32. 1888. Saunders— " p, 31. 1889. Howard— " p. 26. " Fletcher— " p. 38. 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 Entomological Society of Ontario; Ontario. Dept. of Agriculture. Toronto, The Society
Size: 1821px × 1372px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
