| 单词 | persian insect powder |
| 释义 | > as lemmasPersian insect powder Persian insect powder n. now historical pyrethrum powder. ΚΠ 1860 Sci. Amer. 13 Oct. 255/2 Constantly on hand Persian insect powder, oxyds of manganese, tin crystals, chloride of zinc. 1925 Woman's World (Chicago) Apr. 15/4 The aphides..can be controlled by spraying with a strong solution of whale oil soap, Persian insect powder, tobacco dust, [etc.]. 1996 Brittonia 48 613/1 The early Persian ‘insect powders’, which were processed and sold in Europe in the 1820s, are believed to have been a mixture of C. roseum and C. corneum. < as lemmas |
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