DUST SPRAYING. 473 



the action of each element positive and in unlimited quantity, as 

 against blue stone alone limited in amount as in the old method. 



By the use of lime dust as a conveyor, the danger of burning the 

 foliage aiid rusting the fruit is entirely removed. We applied the 

 same strength sulphate of copper and Paris green, the past season, to 

 our apple trees, cherry trees, plum trees, pear trees, quince trees, 

 grape vines, gooseberries, currants, strawberries, raspberries, vege- 

 tables and roses without injury to any of them in the slightest de- 

 gree. The ratio of any element in the formula can be increased 

 at pleasure with perfect safety to the foliage. The simple change 

 of the conveyor enables us to apply the same rational mode of treat- 

 ment of disease on human life to the treatment of disease on plant 

 life, viz., suit the dose to the virulence of the disease. If the case 

 is stubborn and well defined, use heroic doses of the antidote. 



The discoloration of fruit in the latter stages of growth by the 

 use of water as a conveyor. is a serious and costly handicap to the 

 fruit grower, entailing upon him, in many cases, heavy financial loss. 

 Even after he has gone to the expense of protecting his crops, the 

 profits in the season's crop slip away from him through premature 

 dropping of fruit and the later attacks of insects and fungi. You 

 know too well the amount of fruit you lose each year from these 

 causes, and they occur after you are through spraying, as you term 

 it. You know the remedy, but at this stage of growth, the risk you 

 must take, both on foliage and fruit, as well as the expense and 

 trouble of applying it, deter you from its use. The simple single 

 change of the conveyor, from the wet to the dry form, will remove 

 these conditions, and if intelligently applied will reduce the ratio of 

 loss to a minimum. Not only this, but the foliage will be held on 

 the tree by these later treatments in a healthy condition, thus in- 

 suring the setting of healthy fruit buds in abundance for the coming 

 season. 



It is even worse than a partial loss on grapes, and some of the 

 stone fruits, such as peaches and plums ; in many instances, it 

 amounts to the loss of the entire crop. The grower knows the 

 remedy for the rots, but he dare not apply it at this stage of growth' 

 — just before ripening. In our treatise, "All about Dust Spray," we 

 publish the experience of Mr. Springer, a large peach grower of 

 Pennsylvania, who states that when he saw small spots like pin 

 heads on his peaches, he sprayed with the lime conveyor eight rows 

 early and late alike the first time, and then twice afterward. He had 

 1,200 trees of the same variety that he did not spray, because it was 

 his first season to use the dust spray, and he did not have confidence 

 in it. The result was, that all his peaches in the eight rows which 



