26 MAINE AGRICULTURAL EXPERIMENT STATION. I9I2. 



As in Table 8, the number of fruits indicated in the "Stung" 

 column includes all apples with wart-like deformities, the cause 

 of which is not known. 



The apparently numerically large number of "wormy" Bald- 

 wins in Mr. Keyser's jDlot is not so great as it appears, — being 

 but 2 percent. Here also, as at Highmoor, very few "wormy" 

 apples were caused by the codling moth. The same statements 

 made regarding such fruit in the discussion of the Highmoor 

 results (pp. 14 and 15) hold for this case. 



The scab on Mr. Coburn's Mcintosh apples undoubtedly de- 

 veloped in storage during the damp weather intervening be- 

 tween harvesting and sorting. But few infections of the fun- 

 gus were observed on the trees and the above is the only rea- 

 sonable explanation of its increase. 



Conclusions. 



Regarding the several experiments as a whole, it is evident 

 that the observations group themselves into two general divis- 

 ions ; one associated with a certain unusual, or perhaps we may 

 say abnormal factor, distinctly associated with one seasonal 

 period. To this factor, i. e., excessive heat, may be ascribed 

 certain definite effects. 



The other observations are associated with climatic condi- 

 tions, the effects of which can only be considered to advantage 

 on the normal or average results of many years. One year will 

 vary from another in its total precipitation or in the relative 

 times of the rainy periods, and upon such conditions the great 

 prevalence or comparative absence of parasitic fungi may rest. 

 Another year may be unfavorable to fungous epidemics and at 

 the same time bring an invasion of insect pests. Again, these 

 two groups of orchard enemies may combine forces, or on the 

 other hand, the seasonal conditions may coincide with the 

 presence of inhibitive factors to result in the absence of both 

 fungus and insect injury to any practical degree. 



This last named condition seems to have existed during the 

 past season. Hence there is no data of any great value for 

 estimating the fungicidal or insecticidal value of the sprays. 



In the case of fruit russeting, none of the percentages from 

 any plots are high and all are so nearly alike that no deductions 

 are warranted. The relation of lime-sulphur injury to strength 



