buhach

Definitions

noun The powdered flower-heads of the plant Pyrethrum cinerariæfolium, and of other species, which are effectual insecticides. Commonly called Persian or Dalmatian insect-powder.

Sorry, no etymologies found.

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I have found that pure buhach powder dusted into the air or burned on a hot shovel in the mushroom house has been more effective in destroying these flies than either the lamp or drowning process.

Mushrooms: how to grow them a practical treatise on mushroom culture for profit and pleasure William Falconer
On the table an old pink cloth is spread, and when we light the lamp and set the little Japanese burner to smoking buhach -- for, alas, there are mosquitoes -- we feel quite snug and homelike.

The Life of Mrs. Robert Louis Stevenson Nellie Van de Grift Sanchez 1895