. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 1917 ENTOMOLOGICAL SOCIETY, 129 TABLE III. C'BVPTOUHYXCHUS LAPATHi, Linn. Treatment \\;hen Applied No. Trees • Examined No. Infested Larvae per tree Not - Infested Per cent. Infiested Carbolineum .... Apl. 18. 1916 •' 13, " " 8, " 5,000 9,000 136 313 June 22. 1916 July 20, " June 22, July 20. " June 22, July 20, " 0- 1 0 0 1? 0 1 0 0 2 2 » 136 136 304 302 0 Creosote Check 0 0 It will be seen from the above table that practically absolute control was
. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 1917 ENTOMOLOGICAL SOCIETY, 129 TABLE III. C'BVPTOUHYXCHUS LAPATHi, Linn. Treatment \\;hen Applied No. Trees • Examined No. Infested Larvae per tree Not - Infested Per cent. Infiested Carbolineum .... Apl. 18. 1916 •' 13, " " 8, " 5,000 9,000 136 313 June 22. 1916 July 20, " June 22, July 20. " June 22, July 20, " 0- 1 0 0 1? 0 1 0 0 2 2 » 136 136 304 302 0 Creosote Check 0 0 It will be seen from the above table that practically absolute control was secured with the carbolineum treatment. Unfortunately, the entire check row did not show a high percentage of infestation, but it is suilicient to indicate that the treatment was effective. In addition to the carbolineum a high crade creosote was. Showing treated row on each side of a check. Note the almost black color of the treated rows. also tried in a limited way. The creosote also gave perfect control and this indicates well, for the row treated stood directly next the check row. The carbo- lineum gave the. bark of the trees a beautiful bro\ni appearance, but it in no Avay affected the vigor of the trees. This brownish coloration gradually becomes re- duced during the summer, but treated trees can be recognized easily at least three *In order to determine the infestation in the treated trees not all of the 14,000 trees were examined. Rows were selected. h»wever, in different parts of the block and every tree examined carefully. In this way, 1,161 trees were closely scrutinized and not a sign of borer work could be found. Based on the result of this examination the figures in the table have been prepared. In the second examination a single larva was found at work on one of the treated trees, but as this was the rare exception the fact has been ignored in the percentage column. 9 Please note that these images are extracted from scanned page images that may have
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