. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 112 THE REPORT OF THE No. 19 broken yellow line along each side and an unbroken one down tbe middle of the back (Fig. 47), are particularly destructive to mignonettes, some seasons it being almost impossible to grow good plants. The insect is, however, an easy one to control. The dusting of infested plants with pyrethrum insect powder is about the best remedy for the caterpillars of this common butterfly. This preparation can be made by mixing thoroughly one part of weight of the insect powder with
. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 112 THE REPORT OF THE No. 19 broken yellow line along each side and an unbroken one down tbe middle of the back (Fig. 47), are particularly destructive to mignonettes, some seasons it being almost impossible to grow good plants. The insect is, however, an easy one to control. The dusting of infested plants with pyrethrum insect powder is about the best remedy for the caterpillars of this common butterfly. This preparation can be made by mixing thoroughly one part of weight of the insect powder with four parts of cheap flour, keeping the whole in a closed vessel for at least 24 hours. The mixture can then be distributed eas- ily by placing it in a small bag of fine muslin which can be tied to the end of a short stick so that it swings freely. If the bag is tapped lightly with another stick held in the other hand, many plants can be gone over quickly and without tiring the operator. Many florists and seedsmen now sell proper bellows or dusters for applying dry powders, and these are not very 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, booksubjectinsectp, bookyear1872
