68 MAINE AGRICULTURAL EXPERIMENT STATION. 191I. 



result from the third appHcation, which was made between May 

 23 and May 28, and which was followed immediately by a few 

 excessively hot days — so hot in fact that some simscald of the 

 fruit occurred in orchards which were not sprayed. The injury 

 in question occurred in two forms. From 2 to 5 per cent of 

 the fruit, principally upon the southwest side of the trees, suf- 

 fered seriously from what appeared to be sunscald, but which 

 was more abundant in orchards which were sprayed with lime- 

 sulfur than in orchards which were sprayed with some other 

 combination. There later developed upon a considerable por- 

 tion of the fruit, which at the time showed no injury, a form 

 of 'russeting' very similar to that caused by bordeaux. Just 

 what the explanation of this injury is, I am not prepared at this 

 time to say, but the evidence points strongly to the conclusion 

 that we should warn fruit growers against the use of lime- 

 sulfur, at least at the strength at which we have been using the 

 solutions during very hot weather."* 



Fruit russeting following the use of lime-sulphur on apples 

 has also been reported in Ohio this past season.** 



These results would seem to be somewhat in accord with 

 those obtained in Maine. The weather conditions, however, 

 were different, and the injured fruit in our experiment was not 

 confined to any particular side of the tree. It was, moreover, 

 found equally on trees of thin and dense foliage. 



Neither does the fact that some fruit injury was found on 

 the intensified, self -boiled lime-sulphur plot prove said -injury 

 to be solely due to weather conditions, when we recall that the 

 mixture in this case was made with a view to getting the max- 

 imum amount of sulphur into solution. 



The injury produced by bordeaux shows that it was from 

 2 to 5 times as great. It was also more severe. In this respect 

 the results of this year agree with those of preceding investi- 

 gators as to the evident reduction of serious damage by the 

 substitution of lime-sulphur for bordeaux mixture as summer 

 sprays. We believe that further work along this line will con- 

 tinue to furnish evidence warranting the substitution of lime- 

 sulphur for bordeaux as a fungicide for all fruits most sus- 

 ceptible to spray injury. 



* Cordley, A. B. In correspondence, Nov. 14, 1910. 



** Selby, A. D. Ohio Agric. Expt. Sta. In correspondence. 



