PYRETHRUM, CAMPHOR, ETC., PROTECTIVE. 19 



declared the powdered leaves to be superior to camphor, 

 pepper, or other insect destroyer. The powder is used 

 pure, or mixed with ten to twenty times its bulk of wood- 

 ashes or flour. It is useful against insects injurious to 

 agriculture, horticulture, and domestic economy ; useful 

 to protect wool, furs, and feathers, collections of natural 

 history, as mammals, birds, fishes, reptiles, and chiefly 

 against weevils, beetles, crickets, roaches, moths, wheat- 

 flies, fleas, maggots, midges, plant-lice, earwigs, spiders, 

 ants, etc., alike in their larva form and as perfect 

 insects. It is recommended to be blown on plants in the 

 field, hot-house, and conservatory, by means of bellows ; 

 to be dusted and blown into walls and furniture, and 

 sprinkled upon feathers, furs, and woollens. In Southern 

 Dalmatia, the powder of the straight-leaved pepper- wort, 

 Lepidium ruderale, Linn., is used against fleas. In 

 Southern Bussia, Aristolochia clematitis, Linn., is used 

 against bugs. In the United States, the powder of the 

 M-ood of Cedrela odorata is used against all noxious 

 insects. 



Cleanly farming is an indispensable duty in all efforts 

 that may be made to keep away insects. Granaries and 

 store-rooms, walls and floors and rafters, should be care- 

 fully brushed and washed with hot water, and ail the 

 sweepings and dust burnt. 



Many weevils are impatient of light, and are destroyed 

 in stored grain by frequently turning it over, and 

 occasionally running it through a winnowing machine. 

 Sprinkling powdered camphor in the store also kills or 

 disperses them. Cultivators should remove all dead 

 wood, all withered branches and shoots, and all the bark 

 from stakes, posts, and palings; burning all unrequired 

 chaff, all infected branches, all stubble, rubbish, and all 



