8o 



MAINE AGRICUI.TURAI, e;xpe;rime;nt station. 191 1. 



on sprayed fruit. Such increase of injury may be due to the 

 nature of the spray, or merely to the addition of moisture at a 

 time when atmospheric conditions could increase the degree of 

 an injury which they could inflict without such addition. 



Injuries ascribed to arsenicals are undoubtedly due to changes 

 taking place when lead arsenate is combined with the lime-sul- 

 phur solutions. A neutral lead arsenate is recommended to re- 

 duce the possibilities of injury. The amount of this injury 

 was this season small, and from the reports of other work is not 

 a common occurrence. 



The use of ''Sulfocide" with lead arsenate was decidedly in- 

 jurious. 



On the basis of other experiments, the use of a carbonic acid 

 gas sprayer is not recommended in applying lime-sulphur with 

 lead arsenate. 



In conclusion we would encourage the trial of the lime-sul- 

 phur solutions, home made or commercial, as substitutes for 

 bordeaux mixture, especially on varieties of apples where bor- 

 deaux injury has been noted. The general results of this sea- 

 son's experiment coincide with the many others reported in this 

 bulletin regarding the effectiveness of lime-sulphur sprays as 

 fungicides, and the reduction of injury to foliage and fruit. It 

 should be remembered that the natural conditions that caused 

 much damage on unsprayed fruit this past season are not of 

 common occurrence, and still more favorable results may be 

 looked for in the future. 



