OO MAINE AGRICULTURAL EXPLRIMLNT STATION. 191I. 



When this fruit was about one-third full size a dark brown 

 discoloration of the tissues immediately surrounding the sepals 

 was observed. This was on the average one centimeter in di- 

 ameter and fairly regular and circular in outline. As the season 

 advanced it did not increase noticeably in size, but became 

 blacker. Such tissue was hard, tough and very resistant to 

 pressure; an axial section showed that the injury was confined 

 to the skin and to a very minute part of the sub-epidermal tis- 

 sues. The macroscopic appearance of such tissues was in ac- 

 cord with the descriptions of "corked" tissues on other parts of 

 bordeaux injured apples. 



When this injury first became noticeable it was invariably 

 accompanied by a bright carmine aureole upon the edge of the 

 basin. This was the certain index of calyx injury on fruit 

 hanging high enough on the tree to obscure the other indications. 

 This aureole disappeared entirely with the growth of the fruit. 



The blackened areas become somewhat depressed and fre- 

 quently showed a tendency to separate and curl away slightly 

 from the normal skin adjacent. 



In rare cases this form of injury spread well into the basin, 

 was irregular in outline and confined to one side of the calyx. 

 Two examples of the more severe type of calyx injury are 

 shown (Fig. 52). 



Cases where the splitting of the skin at the edge of the injury 

 gave opening for fungous infections resulted a little before har- 

 vest in the production of a very small amount of rot. 



Injury from bordeaux mixture was of the nature indicated 

 by the illustrations (Fig. 50) and tallied with the description of 

 such injury previously given in this bulletin. 



Both bordeaux and calyx injury were evidently inflicted by 

 the second application of the spray. No further effects were 

 noted after the final spraying. 



The fruit on the "Sulfocide" plot suffered injury commen- 

 surate with that of the foliage, both in amount and degree. 

 The burning appeared at the same time as the calyx injury 

 already mentioned, but in this case the last application, although 

 diluted beyond the specified recommendation, produced addi- 

 tional injury. 



Here also the damage inflicted was chiefly at the calyx. It 

 was vastlv greater than that previously described, and more- 



