. [Report of the commissioners] [microform] : appendices C to F inclusive, containing evidence taken by the commissioners, special reports, etc. in vols. III, IV and V. Agriculture; Natural history; Agriculture; Sciences naturelles. Fig. 66. In Fig 66 a represents the , a specimen of the work of this insect, b and c tlie perfect winged insects- magmhed ; the liair lines at the sides give the correct size. Very serious injury is done by these attacks, and frequently young trees are so badly affected that they becom. (juite useless, and have to be dug up and destroyed. The pj'esence of th
. [Report of the commissioners] [microform] : appendices C to F inclusive, containing evidence taken by the commissioners, special reports, etc. in vols. III, IV and V. Agriculture; Natural history; Agriculture; Sciences naturelles. Fig. 66. In Fig 66 a represents the , a specimen of the work of this insect, b and c tlie perfect winged insects- magmhed ; the liair lines at the sides give the correct size. Very serious injury is done by these attacks, and frequently young trees are so badly affected that they becom. (juite useless, and have to be dug up and destroyed. The pj'esence of the insect may be suspected from the unhealthiness of the tree, but it can only be actually discovered by laying bare and examining the roots. It is very seldom that one sees a lot of young trees exposed for sale which .are not more or less affected by this pest. The only artificial nnnvxXy which has been suggestetl is to uncover the roots lif the tree as much as possible, and pour scalding water'upon them, thus destroying tiie insects. This, however, is a tedious and troublesome remedv and one not very often used The insect is preyed upon by a species of ,S//rph, tiv, J'ipiza ra,/lc,m, which liiy>^iti eggs on the roots, and the larvic which are hatched-out feed freely upon the lice. {Fiy 67). [.\fr. W Fig. (i7. Fi;/. 67 shows this fly with its larva («) and chrysalis (6), all magnified., Siiumlers.']. 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 Ontario. Agricultural Commission (1880). [Toronto? : s. n. ]
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Keywords: ., bookcentury1800, booksubjectagriculture, booksubjectnaturalhisto
