. Annual report. Entomological Society of Ontario; Insect pests; Insects. Fig 3. carbolic acid «oal oil or insecticide known as " insect powder," or pyrethrum. These remedies which I have mentioned are active remedies ; but con- trasted with these there is another class of equal importance, which are called preventive remedies, by which steps are taken to prevent anticipated attacks from taking place. Amongst these the most important are the following : High culture, by which a vigorous and healthy growth is promoted—a proper system of rotating crops, by which insects attracted to a
. Annual report. Entomological Society of Ontario; Insect pests; Insects. Fig 3. carbolic acid «oal oil or insecticide known as " insect powder," or pyrethrum. These remedies which I have mentioned are active remedies ; but con- trasted with these there is another class of equal importance, which are called preventive remedies, by which steps are taken to prevent anticipated attacks from taking place. Amongst these the most important are the following : High culture, by which a vigorous and healthy growth is promoted—a proper system of rotating crops, by which insects attracted to a locality by a certain crop will not have in that same locality two years running, the same plant to feed upon. Clean farm- i11?) by which all weeds and rubbish are prevented from accumulating. Changing the. Fig,. 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
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
