. Ontario Sessional Papers, 1874, mall fly which produces a swelling or gall on theroot, and although we have not yet heard of the work of thisinsect appearing anywhere in Ontario, it will in all probability befound here as it is common in Massachusetts and also in theWestern States ; hence as one of our prospective foes we shalldevote a small space to it. Figure 1 gives a good representation of one of these galls,which was found on the roots of a raspberry bush. The swellingis composed of a yellowish pithy substance, scattered throughoutwhich are a number of cells, and in these are en
. Ontario Sessional Papers, 1874, mall fly which produces a swelling or gall on theroot, and although we have not yet heard of the work of thisinsect appearing anywhere in Ontario, it will in all probability befound here as it is common in Massachusetts and also in theWestern States ; hence as one of our prospective foes we shalldevote a small space to it. Figure 1 gives a good representation of one of these galls,which was found on the roots of a raspberry bush. The swellingis composed of a yellowish pithy substance, scattered throughoutwhich are a number of cells, and in these are enclosed small whitelarvae, the progeny of the little fly. These soon change to chry-salides, and the latter in turn in a short time produce the perfectinsects, which eat their way out through the substance of the gall,leaving small holes to mark their place of exit. This same insectattacks sometimes the roots of Rose-bushes. Whenever and wherever these swellings or excrescences arefound, they should at once be committed to the flames. 296. Colour Brown. 37 Victoria. Sessional Papers (No. 1.) A. 1873 Fio. 2. AFFECTING THE Red-necked Agrilus (Agrilus ruficolUs, Fab). This insect was first described by the great German EntomologistFabricius, in the year 1801, but for very many years after this nothingwas known of its earlier or larval history. In 184G, Professor S. s!Haldeman contributed a paper to the Quarterly Journal of Science andAgriculture in which details of the injury it does to the Raspberrywere first given. More recently Prof C. V. Riley, in the second volumeof the American Entomologist has given a fuller account of the opera-tions of this insect, and from this source much of the following has beencondensed. In the spring time when raspberry and blackberry patches are beingpruned, the canes will often be observed to swell out in places to thelength of an inch or more in the manner shown in figure 2. Thisswelling is a sort of pithy gall and has been named the Ras
Size: 1317px × 1896px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorontariol, bookcentury1800, bookdecade1870, bookyear1874
