PLANTS INSECTICIDAL PROPERTIES. 49 



Saussurea lappa (Decaisne) C. B. Clarke. Asteeaceae. Synonyms: Aplotaxis 

 lappa Decaisne, Aucklandia costus Falconer. Costus root. Himalayan re- 

 gion. 



Von Mueller (91, p. 1$2) , quoting De Rinzi, says that this plant 

 is used as an insecticide to keep moths from cloth. The leaves are 

 used as a wrapping for shawls. 



Schkuhria abrotanoides Roth. Asteeaceae. Peru to Argentina. 



Haas (36) reports that the flowers of this are used in Peru for the 

 same purpose as insect powder. 



Von Mueller (91, p. Jf97) says that this annual herb yields locally 

 an insecticide powder. 



Schoenocaulon officinale (Schleeht. & Cham.) A. Gray. Liliaceae. Syno- 

 nyms: Veratrum officinale Schleeht. & Cham., Helonias officinalis Don, Asa- 

 graea officinalis Lindl., Sabadilla officinarum Brandt & Ratzeb. Sabadilla. 

 Cebadilla. Mexico to Venezuela. 



The use of sabadilla seed against lice seems to have been known for 

 a long time. According to various botanical books, sabadilla powder 

 is used by cattle raisers in Venezuela as an insecticide with excellent 

 results. 



Herrera (Ifi, p. 21) had no success with it against the winged forms 

 of fruit maggots (Instrypetas ludens I. D. B.). 



McClintock, Hamilton, and Lowe (58, p. 233) ascertained that 

 sabadilla seeds, used as a fumigant, had a slight effect on flies and 

 clothes moths and a considerable effect against mosquitoes. 



Scott, Abbott, and Dudley (83,. p. 5, 12) ascertained that powdered 

 sabadilla seed, used as a dust, killed from 95 to 100 per cent of the 

 bedbugs treated within 48 hours; and used as a stomach poison (1 

 part to 9 parts of corn meal) , it killed from TO to 100 per cent of the 

 roaches treated within 19 to 34 days. 



Abbott (1, p. 7) found the powdered seed effective against chicken 

 lice, but he does not recommend it because it is too expensive and not 

 readily available in large quantities. 



The writers' results are given on page 9. 



Sericocarpus asteroides (L.) B. S. P. Asteeaceae. Whitetop-aster. East- 

 ern United States. 



The writers' results are given on page 23. 



Sideroxylon borbonicum A. DC. Sapotaceae. Bourbon Island. 

 Greshoff (31, p. 101) lists this as an insecticide. 



Solanuni auriculatuni Ait. Solanaceae. Asia. 



Greshoff (33, p. HI) reports that a decoction of the berries is 

 used as an insecticide. 



Solanuni carolinense L. Horsenettle. Eastern United States. 



Riley (71) found a decoction of this ineffective against cotton cater- 

 pillars. 

 The writers' results are given on page 23. 



