Economic entomology for the farmer Economic entomology for the economicentomolo00smit_0 Year: 1896 122 AN ECONOMIC ENTOMOLOGY. abundant and correspondingly more troublesome southward. A species sometimes occurs in considerable number on orange. As the insects live exposed in all stages, they are easily reached by contact poisons, and of these the kerosene emulsion is usually the most satisfactory. It kills them in all stages at moderate strength. one part of emulsion in ten or twelve parts of water being ordi- narily sufficient. Whale-oil soap is quite as effective, and is preferab
Economic entomology for the farmer Economic entomology for the economicentomolo00smit_0 Year: 1896 122 AN ECONOMIC ENTOMOLOGY. abundant and correspondingly more troublesome southward. A species sometimes occurs in considerable number on orange. As the insects live exposed in all stages, they are easily reached by contact poisons, and of these the kerosene emulsion is usually the most satisfactory. It kills them in all stages at moderate strength. one part of emulsion in ten or twelve parts of water being ordi- narily sufficient. Whale-oil soap is quite as effective, and is preferable on some house or conservatory plants, while even the pyrethrum extract is useful on a small scale, and is, perhaps, the cleanest of all on house-plants.
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