138 SPRAY MACHINERY AND SPRAY MATERIALS 



FORMULAS FOR THE STOMACH POISONS. 

 ARSENATE OF LEAD. 



Paste Form. 



Arsenate of lead 2 to 5 pounds 



Water 50 gallons 



Powder Form. 



Arsenate of lead . . 1| to 3 pounds 



Water 50 gallons 



This poison is in many respects the most satisfactory of 

 any of the arsenical sprays. It is very adhesive and if 

 properly made will not burn the foliage to any extent. More 

 pounds of the paste form must be used to a given quantity 

 of water than the powder form because of the amount of 

 moisture present in the paste. 



PARIS GREEN. 



Paris green \ to 1 pound 



Stone lime 2 to 3 pounds 



Water 50 gallons 



The chief fault with the Paris green is its tendency to burn 

 the foliage. If it is not added to some fungicide, stone lime 

 should be added to the water in order to reduce the amount of 

 burning of the foliage. If Paris green is used in combination 

 with Bordeaux mixture the addition of lime is not necessary. 

 This insecticide is a very active poison. 



WHITE HELLEBORE. 



When Used as a Spray. 



White hellebore 1 ounce 



Water 3 gallons 



When Used as a Powder. 



White hellebore 1 ounce 



Air-slaked lime, flour or sifted road dust .... 5 ounces 



PYRETHRUM. 



When Used as a Spray. 



Pyrethrum 1 ounce 



Water 2 gallons 



When Used as a Powder. 



Pyrethrum 1 ounce 



Air-slaked lime, flour or sifted road dust .... 5 ounces 



