i9io.] 



Official Circulars and Notices. 



149 



under different conditions, the results might be different, and the matter 

 must still be considered as more or less experimental. A strength of 

 i^- gallons of the commercial solution may prove to be sufficient in 

 most cases, and the danger of injury would then, perhaps, be entirely 

 eliminated. 



The experiments made by the Department of Agriculture, in 1908 and 

 1909, as well as the published records of other investigators, show that 

 the lime-sulphur solution is apparently as effective as Bordeaux mixture 

 in the control of apple scab. Under more severe conditions than those 

 which existed in the experimental orchards, the treatment might fail; 

 but at present it is very promising. Lime-sulphur will control leaf- 

 spot and other minor troubles, as well as apple scab, but so far it has 

 not proved to be a satisfactory remedy for apple blotch (Phyllosticta) 

 or bitter-rot. However, the experiments on those two diseases have not 

 been carried far enough to determine what may be expected of it in 

 this connection. 



The self-boiled lime-sulphur is entirely harmless to apple foliage, 

 and apparently has a stimulating effect, but it is not as effective against 

 scab as the boiled wash. The experiments show that it will control 

 mild cases of scab and will entirely prevent leaf-spot, "fruit-spot," and 

 the sooty fungus, but in districts where scab is a serious disease, this 

 wash would probably be inefficient. 



According to the information at hand, arsenate of lead is unquestion- 

 ably the poison to use with the lime-sulphur mixture. Instead of increas- 

 ing the caustic properties of the mixture, as at first feared, it apparently 

 has the opposite effect to some extent, and does not lose any of its 

 insecticidal value by reason of the combination. In all the experiments 

 the combination of Paris green and the lime-sulphur solution proved to 

 be injurious to apple foliage, and in Arkansas the combination of 

 arsenite of lime and lime-sulphur was exceedingly injurious. 



According to the results obtained in the Arkansas experiment, three 

 applications of the commercial solution at a strength of 1 gallon to 

 30 gallons may be made without material injury to apple foliage, but 

 after the fourth application, the injurious effect becomes serious, and 

 after the fifth the injury is almost disastrous to both fruit and foliage. 

 It appears, therefore, that the injury is cumulative, and that it is 

 unsafe to make more than three applications, or four if one is made 

 before the trees bloom. 



OFFICIAL CIRCULARS AND NOTICES. 



The Board of Agriculture and Fisheries have made an Order to 

 enable Local Authorities to enforce more effectively the provisions of 

 the Exportation of Horses Order of 1898, and 

 Exportation of Horses to ensure that decrepit horses intended to be 

 to Belgium or the shipped from Great Britain shall in every case 



Netherlands. ^ e exam i ne d and passed as fit for the voyage 



by a veterinary inspector of the Local Authority 

 of the port of shipment. To secure examination in every case in which 

 it is desirable, the Order requires that notice of the intended exportation 

 of any horse, whether decrepit or not, from Great Britain to Belgium 

 or the Netherlands, shall be given to the Clerk of the Local Authority 



