SPRAYING THE APPLE ORCHARD. 



.'.1 



during wet weather, except that the spraying immediately 

 after the blossoms drop must be made while the calyxes are 

 open, as explained below. 



Insecticides. — The Bordeaux mixture is to prevent dis- 

 eases of foliage and fruit ; it has no value against the cod- 

 ling moth. For it and leaf-eating insect pests use arsenate 

 of lead, Paris 

 green or green 

 arsenoid. Arse- 

 nate of lead 

 seems to adhere 

 to the foliage 

 better, but costs 

 a little more, as 

 it should be 

 used at the rate 

 of two pounds 

 to the barrel, 

 while one-half 

 pound of Paris 

 green per bar- 

 rel is about 

 equally efficient, 

 and the two in- 

 secticides cost 



about the same Fig.3S.— "Ansenate of lead adheres to the foUage." 

 •, Leaves sprayed Juue 1 with spray still adhering 



{) e r p U n Q. - when photographed in September 



Home-made in- 

 secticides such as home-made arsenate of lead, arsenite of 

 lime or soda, are not advised, for although somewhat 

 cheaper there is some danger in making them, and the 

 purity of the chemicals cannot be known by the buj'er, 

 and in many cases poorer results ensue. For the amount 

 of insecticide which will be used in the average orchard 

 it is better to buy it ready made, but be sure that the 

 name of the maker is upon the package and that its purity 

 is guaranteed. Add the insecticide to the Bordeaux mix- 



