105 



841. LIME. 



The dry lime is sifted on, or, as whitewash, is applied with brush. 



842. LYE. 



In 1 gallon water 1 pound of concentrated lye is dissolved as a solu- 

 tion to spray on trees. 



843. MERCURY. 



Finely-divided mercury mixed with sand is placed about roots of 

 grape-vines to protect from Phylloxera. 



844. NAPHTHALINE. 



Used in the ground around roots that are attacked by insects and in 

 cabinets to repel museum pests. 



845. NAPHTHA. 



» 



Used like kerosene, but not so good. 



846. PYRETHRUM FLOWERS— Dalmatian. 



From these the Buhacli of Mr. G. N. Milco, Stockton, Cal., and the 

 Dalmatian insect powders are made. Species, P. cineraricefolium. 



847. PYRETHRUM POWDER OF THE FLOWERS— Dalmatian. 



This is the P. cineraricefolium , or California Buhacli powder. This 

 is blown or sifted on dry; also applied in water, 1 gallon to a table- 

 spoonful of the powder, well stirred and then sprayed. 



848. PYRETHRUM POWDER OF STEMS— Dalmatian. 

 Used like the preceding, but not so good. 



849. PYRETHRUM POWDER— Adulterated 



This is sold quite extensively by the trade, and should be avoided as 

 being poor, often worthless. 



850. PYRETHRUM FLOWERS— Persian. 



From these the Persian insect powder is derived. Species, P. roseum. 



851. PYRETHRUM POWDER OF THE FLOWERS— Persian. 

 P. roseum, or Persian insect powder. Used as just stated above. 

 852. PYRETHRUM POWDER OF THE STEMS— Persian. 



Used like the preceding, but not so good. 



853. QUASSIA. 

 A strong decoction is useful against soft- bodied insects. 



