102 Annals of Horticulture. 



the Bordeaux mixture and some form of arsenic. This com- 

 bination has been thoroughly tested at two stations* the past 

 year, the conclusions reached in each case being that the 

 action of neither insecticide nor fungicide is weakened when 

 the two are applied together. 



The active principle of the Bordeaux mixture has not yet 

 been definitely determined. Bulletin 48 of the Cornell station 

 contains an abstract of an article written by Livio Sostegnif 

 upon the chemical composition of Bordeaux, and the best 

 method of preparing the mixture. 



It is stated that probably the most valuable portion of the 

 Bordeaux is the basic sulphate of copper, as this substance 

 is more readily dissolved by the carbonic acid gas of the 

 atmosphere. Quick-lime does not appear to be an essential 

 in the preparation of the mixture. If sufficient air-slaked 

 lime is used, this will answer the same purpose, provided 

 that more time is allowed for the reaction to take place, 24 

 hours being desirable. It was found that practically one- 

 third more lime is required when it is air slaked than when it 

 is fresh. . 



Circulars addressed to the leading apple growers in all 

 parts of the country, to determine the prevalence of the apple- 

 scab fungus, were sent out by the Cornell station. J The 

 replies received show that this disease is present in all dis- 

 tricts where apples are grown to any extent, and it is probable 

 that none of the varieties generally grown are free from it, 

 although some varieties are more susceptible to injury than 

 others. 



The work which relates to the best methods of treating 

 plant diseases strongly emphasizes the fact that applications 

 should be made earlier than heretofore recommended. The 

 work done in the laboratory and in the field shows that for^a 



before the buds start. This applies particularly to the apple 

 scab fungus;§ fungous diseases of the grape;|| anthracnose 



