. Bulletin. Agriculture -- Ontario. Fig. 20. Woolly Aphis of the apple ; much enlarged, except Fig. 22. Apple-root Aphis ; a distortions on a root; b, wooly wingless form ; c, winged Aphis—greatly enlarged. SCALE INSECTS. The most dangerous enemies of fruit-trees are undoubtedly the Scale Insects, of which we have several destructive species in Canada. The worst of these is certainly the notorious San Jose Scale (Aspidiotus per- niciosus), Fig. 23, which is now firmly established in the Niagara fruit district and in the Counties of Essex and Kent; it will probably also be found in some
. Bulletin. Agriculture -- Ontario. Fig. 20. Woolly Aphis of the apple ; much enlarged, except Fig. 22. Apple-root Aphis ; a distortions on a root; b, wooly wingless form ; c, winged Aphis—greatly enlarged. SCALE INSECTS. The most dangerous enemies of fruit-trees are undoubtedly the Scale Insects, of which we have several destructive species in Canada. The worst of these is certainly the notorious San Jose Scale (Aspidiotus per- niciosus), Fig. 23, which is now firmly established in the Niagara fruit district and in the Counties of Essex and Kent; it will probably also be found in some other localities. So much has been published respecting this insect in the Reports of the Entomological Society of Ontario and in the agricultural and horticultural periodicals, and the pest has become so widely known, that it is unnecessary to enter into any details here. While its extermination is hardly to be expected, it can be kept under control and even got rid of in an orchard by persistent and careful spray- ing with the lime-sulphur wash, provided that it is properly made and. 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. Dept. of Agriculture. Toronto : The Dept.
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