New York Agricultural Experiment Station. 147 



can be controlled by summer pruning commenced while the plants 

 are young and continued regularly each season. The experiment 

 was conducted on the farm of J. R. Clarke & Son, Milton, X. Y. 

 It comprised 21 rows of currants, 512 feet long, planted in a pear 

 orchard. The pear trees were planted 16 x 16 feet. The currants 

 (variety, Cherry) were set in the rows of pear trees and also be- 

 tween them in such manner that two rows of pear trees included 

 four rows of currants. At the beginning of the experiment there 

 were blank spaces between every other pair of pear trees so that 

 the currants stood in plats of four rows each with blank spaces 

 16 feet wide between plats. (See the accompanying diagram). 1 



OxxxxxOxxxxxO The experiment included six of these f our- 



xxxxxxxxxxxxx row plats containing approximately one- 



' xxxxxxxxxxxxx fourth acre each Three plats (II, IV and 



OxxxxxOxxxxxO VI) were given the summer-pruning treat- 



ment while the alternating three plats (I, 



Ill and V) were left untreated for checks. 



OxxxxxOxxxxxO In 190S two rows of currants were planted 



xxxxxxxxxxxxx in each of the blank spaces, but these 



xxxxxxxxxxxxx were not included in the experiment. 

 OxxxxxOxxxxxO 



The currants had been set out in the spring of 1906. Our 

 experiment was begun in the spring of 1907 and continued 

 through six seasons. Each winter all six plats were winter pruned 

 in the usual manner under the direction of the owners. The 

 spraying, also, was done by the owners. Each spring before the 

 appearance of the leaves all six plats were sprayed with lime- 

 sulphur for San Jose scale. Currant worms were well controlled 

 on all plats by a single spraying made each season about June 1. 

 For this purpose bordeaux and arsenate of lead were used in the 

 first two seasons and lime-sulphur and arsenate of lead in the last 

 four seasons. The summer pruning was all done by the writer 



10 = pear tree; X = currant bush. Currants set 2% to 3 feet apart in 

 the row; rows 5y 3 feet apart. Dotted lines indicate the two rows of currants 

 set between plats in 1908. 



