WHAT AILS YOUR PLANTS 235 



simply stirred up in water; or it may be added to 

 Bordeaux mixture. The proportions used are one 

 pound of Paris green to one hundred and fifty or 

 two hundred gallons of water or Bordeaux. When 

 used in water, two or three pounds of lime are added. 



In Small Quantities. Take a heaping teaspoon- 

 ful of Paris green to three gallons of water or three 

 gallons of Bordeaux mixture. This is the equiva- 

 lent of one-fourth of an ounce. 



If you use it in Bordeaux, no lime need be added. 

 If you use it in water, add three heaping teaspoon- 

 fuls of lime. 



ARSENATE OF LEAD 



About the only difficulty with old-fashioned 

 Paris green is the fact that it washes off readily. 

 In the case of some vegetables, such as cabbages, 

 this may be no disadvantage. We prefer to have 

 the poison come off before the heads are marketed. 

 As a rule, however, it is a distinct advantage to 

 have a poison that will adhere through showers. 

 Arsenate of lead will do this. 



Standard Formula. Arsenate of lead is used at 

 strengths varying all the way from three pounds 

 to the hundred gallons up to twenty pounds to the 

 hundred gallons. It depends on the power of re- 

 sistance of the species of insect for which the spray 

 is applied. There is no danger of burning the foliage. 



In Small Quantities. This chemical comes in 

 the form of a thick, sticky paste. For ordinary 

 use take one tablespoonful, just slightly rounded, to 

 one gallon of water or Bordeaux mixture. 



