270 Agricultural Experiment Station, Ithaca, K. Y. 



Fosite is a very fine, bluish gray powder (see page 293). It was 

 applieil to the trees by means of a bellows furnished us by C. H. 

 Joosten, 3 Coenties Slip, New York City. The discharge pipe of the 

 bellows was entirely too short to reach the tops of the trees, but a 

 fairly uniform application could be made by climbing into the tree and 

 then blowing the powder at short range. This method is, of course,' 

 impracticable for commercial work. Fostite is sold in one hundred 

 pound lots for $6.50, but larger quantities are sold at a lower rate. 



Paris green was used at the rate of two and one-half ounces to 

 forty gallons of water, which is about the same as one pound to two 

 hundred and lifty-six gallons of water. Loudon purple was used in 

 the same proportion as the Paris green. 



Objects of the experiments. — The above materials were applied with 

 the intention of observing the following points: 



1. The number of applications of fungicides and insecticides neces- 

 sary to produce fair fruit. 



2. The comparative values of the fungicides. 



3. The comparative values of the insecticides, and the advisability 

 of applying them in combination with fungicides. 



Division of the orchard and dates of applications. — The orchard 

 was divided so that some trees should be sprayed two times, others 

 four times, and some even six times. Those sprayed twice received 

 the first application May 19, and the second June 8. On the former 

 date the first blossoms had just opened, only about a dozen being 

 noticed, all upon King trees. At the time of the second treatment 

 a few blossoms still persisted upon the trees. At first the intention 

 was to have a shorter interval between the two applications, but the 

 season advanced so slowly that it was thought advisable to wait. The* 

 trees which were sprayed four times were treated April 26, May 19, 

 June 8, and June 22. When the first application was made, the buds 

 upon the trees were swollen and almost ready to burst, but their win- 

 ter covering still surrounded them more or less completely. In our 

 experiments of last year the necessity for early applications was 

 strongly indicated. On June 22, at the time of the fourth application, 

 the young ap])le8 had set and active growth had begun. 



The third lot, the one receiving six apjilications, was sprayed on the 

 same dates as the preceding, but in addition the trees were sprayed 

 July 13, and again August 1. In this manner the fruit and foliage 

 were well protected during almost the entire season. 



Combinations used. — The trees upon which fostite was applied 

 were also selected for the comparative test of London purple and 



