THE CANADIAN ENTOMOLOGIST 



397 



PERCENTAGE OF DIFFERENT GRADES OF ALL VARIETIES 

 IN EXPERIMENTAL ORCHARD. IN 1917. 



T.A.BLE No. 3. 



It should be noted here that the orchard in question has 

 always received better than average care. Before the infestation 

 of the bug began to make itself felt, it yielded crops considerably 

 above the average. It has always been sprayed for apple scab 

 and biting insects, and the quality of fruit has generally been 

 better than the average in spite of the increasing number of gnarled 

 and twisted fruit due to the work of the bug. The percentage of 

 different grades obtained since 1911, is shown in Table No. 2. 



Lastly, a comparison of the different grades of fruit in the 

 orchard treated by us and by the owner, shows a decided advantage 

 in favour of the former, as shown by Table No. 3. This was largely 

 due to the smaller percentage of twisted fruit, as the scab control 

 was about equal. As previously stated, the natural infestation in 

 that part of the orchard treated by the owner was much lighter 

 than in the remainder. 



A comparison of the conditions in the experimental orchard 

 in 1918 with those of the previous season is of interest. This 

 year the orchard was not sprayed for the Green Apple Bug. Care- 

 ful examination of the orchard shows that in the older, larger 

 trees, there is still a considerable infestation, though not quite so 

 severe as formerly, while in the Golden Russet orchard, where it 

 will be remembered the best work was done in 1917, the pest 

 could only be found by searching. The necessity of doing timely, 

 thorough work from the standpoint of future years' infestations, 

 is thus further emphasized. 



