APPLE SPRAYING EXPERIMENTS IN I914. I95 



somewhat less than 82 per cent of perfect apples in one case as 

 compared with slightly over 96 per cent in the other. 



It is rather difficult to account for the slight leaf injury and 

 the rather large amount of fruit russeting which occurred on 

 plot 2. At the time the single application of bordeaux mixture 

 was made the first foliage leaves were very small and just 

 beginning to unfold, while the flower buds were not fully open 

 till some few days after. The fruit russeting which occurred 

 on this plot had every appearance of bordeaux injury, yet at 

 first thouglit it hardly seems within the range of possibility that 

 a spray appHed before the blossoms open could in any way 

 injure the fruit which set later. While it does not seem prob- 

 able the only possibility in this connection is that enough of the 

 bordeaux mixture from the early spraying, which was quite 

 thorough, adhered to the limbs and twigs and was washed ofif 

 onto the fruits by rains, after the latter had set, in sufficient 

 quantity to cause the injury observed. Another hypothesis 

 which has suggested itself to the writers is that sufficient bor- 

 deaux mixture from the later sprayings of the adjoining plot 

 drifted across and caused the injury referred to. This seems 

 improbable also for care was taken to avoid this contingency as 

 much as possible and no trouble of like nature has been experi- 

 enced in the past with adjoining plots under like conditions. 

 Moreover the apples used for sorting came from the two inner 

 rows on plot 2 and none from the outer row of trees adjoining 

 those sprayed with bordeaux mixture. 



The amount of russeting on plot 2 was not fully appreciated 

 until after the fruit was harvested and the sorting began. 

 Therefore no critical observations were made to see whether or 

 not the rows of trees or the sides of individual trees which were 

 most exposed to the drifting of the spray from plot i showed 

 the most russeting of the fruit. There was nothing of this 

 nature which attracted attention in making the summer obser- 

 vations in the field. The same experiment will be repeated 

 during the coming season and careful observations will be made 

 to check up this point. 



Copper-lime-sulphur. This spray combination did not give 

 any better scab control than ordinary lime-sulphur and the large 

 amount of leaf injury and fruit russeting, over 57 per cent of 



