INSECTICIDES AXD FUNGICIDES 195 



and is a good contact insecticide, particularly for soft-bodied 

 insects like plant-lice and slugs. 



Dry lime sulphur. — This is frequently used combined with 

 powdered arsenate of lead to control fungus diseases and to 

 destroy chewing insects in both orchard and garden. These 

 materials may be applied by dusting, an.d by combining them 

 with water. 



The advantages of the dry mixtures on the liquid are as 

 follows : 



1. Cost of operation is low. 



2. Where the water problem is difficult to solve, the dust 

 spray is highly recommended. 



3. Dusting is effective in destroying both insects and disease. 



4. The material takes up less room and is shipped at low cost. 



5. The materials are not injured by frost. 



6. Both the dry lime sulphur and arsenate of lead may easily 

 be mixed with water if the liquid solution is desirable. The dry 

 material is applied at the rate of twelve to fourteen pounds to 

 fifty gallons of water (dormant spray) for a liquid solution. To 

 control the apple scab and the codling moth, apply at the rate 

 of one and one-half pounds of arsenate of lead plus three pounds 

 of dry lime sulphur to fifty gallons of water (summer spray). 



For the home garden, the following combinations and amounts 

 are recommended: 



Dry Arsenate of Lead : 



Seed Fruits and Truck Crops: 



3 to 4 level tablespoons to one gallon water. 

 Stone Fruits: 



2 to 3 tablespoons to one gallon water. 



Arsenate of Calcium: 



Seed Fruits and Truck Crops: 



11/4 to 2 tablespoons to one gallon water. 

 Potatoes : 



2 to 3 tablespoons to one gallon water. 

 Stone Fruits: 



1 to ll/^ tablespoons to one gallon water. 



Paris Creex: 



1 to 2 level teaspoons to one gallon water. 



Insecto : 



General Truck Crops and Seed Fruits: 



8 to 9 level tablespoons to one gallon water. 

 Stone Fruits: 



5 to 6 tablespoons to one gallon water. 



