280 Ageioultural Experiment Station, Ithaca, N. T. 



None of the apples showed the effects of spraying more plainly 

 than the Fall Pippin. This variety is very subject to the attacks of 

 scab, and diagram II shows clearly the comparative values of the fungi- ' 

 cidei, as well as the benefits derived from proper applications. By 

 comparing the untreated plot Avith the Bordeaux, it will be seen that 

 the second one (5) is practically the reverse of the first (a). The 

 unaprayed Fall Pippin yielded scarcely a first-class apple, the bulk of 

 the crop being third-class. The apples treated with Bordeaux are 

 mostly first class apples, while the proportion of thirds is exceedingly 

 small. Certainly it pays to spray this variety. 



Insecticidal values of the arsenites. — Although the London purple 

 and Paris green used in these experiments contain about the same 

 amounts of arsenic, still it is held in different forms. Applications 

 were made to determine their comparative values. 



Table IV. — Showing the Results Obtained from Applications 



of the Arsenites. 



The apples were on the whole very free from worms, whether 

 sprayed or not, yet the above table indicates some of the effects of the 

 applications. 



The per cent of wormy apples among those sprayed but once with 

 Bordeaux, is large when compared with the apples which were not 

 sprayed. In one case, the number is larger, but on the average a small 

 gain was made. This application was made June eighth, as soon as 

 the blossoms had fallen from the trees. 



All varieties show a considerable decrease in the number of wormy 

 apples when the trees were treated twice. The second application was 



