1 8 NEW YORK STATE MUSEUM 



varied from 97.53 to 99.53 with an average of 98.69. As in the 

 preceding plot, the side wormy apples largely predominate, there 

 being a total of 118. while the end wormy amounted to but 26, half 

 of these being both end and side wormy. 



The contrast between this data and that obtained from the check 

 tree is striking. The latter produced only 38.95 per cent of sound 

 fruit, 450 of the 536 wormy apples being end wormy, while the 

 relatively small number of 324 were side wormy, 238 of the latter 

 being both end and side wormy. It will be seen that the check trees 

 practically reverse the relations obtaining between end and side 

 wormy and that the major proportion of the protection from codling 

 moth injury is due to the destruction of the caterpillars before they 

 enter the blossom end. 



Tests in comm.ercial orchards. It was deemed advisable, in 

 connection with the experiments described above, to check up re- 

 sults by comparison with those obtained in commercial orchards. 

 The spraying in the two selected was made with no foreknowledge 

 that any such data would be used, and the results could therefore 

 be hardly better than most practical orchardists might hope to 

 obtain. 



The first of these practical tests was in a young orchard belonging 

 to ^Ir W. H. Hart of Arlington, near Poughkeepsie and close to 

 Briggs station on the Hopewell branch of the Central Xew England 

 Railroad. The orchard is on a moderately high hill, the trees are 

 thrifty, about 18 years old, 30 feet apart and from 17 to 19 feet 

 high. The trees selected were all nothern spies and an effort was 

 made to secure only those which were fairly representative of the 

 orchard, which latter, it may be stated, is in excellent condition and 

 represents an advanced type of orchard management. The trees 

 were sprayed, we are informed, ^lay 24th or 25th when the blos- 

 soms had fallen just enough so that there was no danger of poison- 

 ing bees. ^Ir Hart used 7 pounds of Grasselli's arsenate of lead and 

 4 gallons of a homemade concentrated lime-sulphur wash to 150 

 gallons of water. This latter sufficed for the treatment of 50 to 70 

 trees. Those selected for the test were somewhat larger than the 

 average and probably received about 2^ gallons each. The fruit 

 was picked October i8th and everything upon the trees and under 

 them carefullv classified. 



