SPRAYING FOR FUNGOUS DISEASES AND LEAF-EATING INSECTS 1 83 



This is not the time to discuss the comparative merits of dust 

 and Hquid spraying, that will come later. In the opinion of the 

 writer it is wiser for the fruit grower to stand by the method he is 

 most conversant with at this date and defer work with a new method 

 until the latter has been tested here. In other words, we believe, 

 though we are ready at any time to be convinced we are wrong, that 

 liquid spraying is the best unless one has lack of water or hilly 

 ground or both. On the other hand, in large orchards, the dust spray 

 is more rapid and, perhaps, more thorough than the liquid spray. 

 It is better when possible to make one's own dry Bordeaux than to 

 buy that sold in the market. 



Adding one pound of Paris green to every loo gallons of tlic liquid 

 Bordeaux or to every fifty pounds of the dust, ivill keep all leaf -eat- 

 ing insects in check. 



The formula for Bordeaux mixture, and the time to apply it is 

 given in the February number of this magazine, on page y2, and need 

 not be repeated here. 



It is well to test the Bordeaux when first made, to make sure 

 that there is not too much copper : 



Test A : Hold a clean, bright knife blade in the solution for 

 one minute : if it becomes coated with copper add more lime. 



Dust spraying with Bordeaux in a large nursery. 



Or, test B : Pour some of the Bordeaux into a white dish and 

 gently blow across the surface; if there is enough lime a thin pel- 

 licle will form on the surface. 



Or, test C: Buy five cents' worth of ferrocyanide of potassium 

 crystals 98% (poison) and dissolve it in ten times its bulk of water. 



