276 STATE HORTICULTURAL SOCIETY. 



are from two different species of plants, and the buhacli is manufactured 

 at Stockton. California, by the Buhach Manufacturing Co., while the 

 pyrethrum is imported from Persia. The powder has a volatile oil that 

 readily escapes on standing, unless confined in nearly air-tight vessels. 

 For this reason the buhach that we can obtain fresh each season is 

 preferable to the imported powder. 



As a dry powder is the way the buhach is usually used, and applied by 

 the means of a hand bellows, or else shaken from a piece of muslin. Its 

 effect on insects is still greater when applied in a confined place, as in a 

 tight room or building. 



As a decoction in water, it is fully equal, if not superior, to the powder 

 dust. If made in this way, about a tablespoonful should be used to each 

 gallon of water (if hot water can be used all the better), and applied 

 with a spray pump. 



BISULPHIDE OF CARBON. 



This insecticide, which kills by suffocation, is used by the horticulturist 

 in destroying the pea and bean «veevil, ants in their hills, and woodchucks; 

 by those who store grain, for the grain moths and weevils; and by the 

 housewife for the clothes moth, carpet beetle, and similar insects. Last 

 season it was tried by several persons quite extensively on plant lice and 

 similar insects with good success. It seems to be a most promising 

 insecticide in many ways. 



Bisulphide of carbon is procured in the liquid form, but upon being 

 exposed a short time to the air it readily changes to a gas and quickly 

 diffuses itself through the air. For this reason it must be confined in a 

 nearly tight jar, box, or building to keep it where it is wanted in treating 

 insects. The liquid comes in tin cans of from one pound to fifty pounds 

 each, according to the amount desired. The best plan is to buy of some 

 wholesale druggist. It is seldom kept by local dealers, and if so it is 

 usually worthless. It is quite inexpensive when bought at wholesale. 



For Grain Insects and Pea, and Bean Weevil. — There will be no 

 danger to seeds or grain, for food or next year's seed, in pouring the 

 bisulphide over them and confining all in a tight box for several days. The 

 gas is much heavier than air and will quickly settle through the grain 

 and permeate the whole. Even the odor will escape in a few hours on 

 opening the box to the air. Great care must he observed in keeping all 

 fire and light from the gas, or near where it is confined, as it is very 

 infiammahle, and explosive when ignited. 



Enough of the bisulphide of carbon should be used so that the gas will 

 penetrate thoroughly. In large quantities, at least one pound should be 

 used to each twenty cubic feet of space. If the box is not tight, more 

 should be used. 



For Ants, make a small hole in the hill, pour in a teacupful of the 

 bisulphide, quickly cover with clay soil and pack it or cover for a few 

 minutes with a wet blanket and then remove the blanket and ignite the 

 gas. 



For Woodchucks saturate a ball of cotton with the bisulphide, roll the 

 ball down the hole and close the latter by packing earth over the entrance. 



