4 HORTICULTURIST'S RULE-BOOK. 



combated at the same time. The arsenites may be added 

 to Bordeaux mixture in the same proportion as if the 

 Bordeaux were plain water. The arsenites are also some- 

 times added to soap and other washes. 



The addition of lime to Paris green and London purple 

 mixtures greatly lessens injury to foliage, and, as a conse- 

 quence, they can be applied several times stronger than 

 ordinarily used, if they are combined with the Bordeaux 

 mixture. The free lime in the mixture combines with the 

 soluble arsenic, which is the material that injures the 

 foliage, and the combination is thus made quite harmless. 



London purple and Paris green should rarely be applied 

 with the ammoniacal carbonate of copper, as the ammonia 

 in the latter dissolves the arsenic, making the combination 

 caustic. The addition of sulphate of copper to the arsenites 

 also increases injury. 



Bait. 1. Paris green or London purple, 1 ounce; chopped 

 grass or leaves, 8 ounces ; and enough syrup to allow the 

 mass to be worked into balls, which are spread about the 

 garden. For wire- worm beetles, crickets, katydids, etc. 



2. Bran, 40 pounds ; middlings, 15 pounds ; arsenic, 20 

 pounds ; cheap syrup, 2 gallons. Mix in soft water to a 

 paste. For grasshoppers and cut- worms. 



Benzine. Sometimes used to kill weevils and other insects in 

 dry peas, corn, and grain. Less useful than bisulphide of 

 carbon. 



Bisulphide of carbon. A thin liquid which volatilizes at a 

 very low temperature, the vapor being very destructive, to 

 animal life. It is exceedingly inflammable, and should 

 never be used near a lamp or fire. It is used for many 

 root-insects. It is poured into a hole, which is immediately 

 closed up, causing the fumes to permeate the soil in all 

 directions. In loose soils it is very destructive to insects. 

 It is also inserted in tight receptacles to kill such insects as 

 pea-weevil and museum pests, where a teaspoonful is suffi- 

 cient for a receptacle holding 2 or 3 gallons. It may also be 

 used for mites and mealy-bugs on live plants. For this 



