Ill 



fungicide known for certain apple diseases. However, the 

 injury which may result from its use is often much more 

 serious than the diseases which it is meant to control. It is 

 better, therefore, to use some other substance which is known 

 to be effective, for the most part, in controlling these diseases. 

 For the present, concentrated lime-sulfur is recommended as 

 a substitute for Bordeaux mixture. It seldom causes serious 

 injury and usually gives very satisfactory control. 



It is fair to state, however, that in certain sections of the 

 State, notably in the eastern part, control of scab and black- 

 rot often is not obtained with the use of lime-sulfur when 

 applied according to the schedule used in other sections. In 

 fact, so many disastrous failures to get control have followed 

 the use of this mixture that great need of investigation to es- 

 tablish better control measures in eastern Massachusetts is 

 indicated. Until such work is carried out, definite directions 

 for the control of scab and black-rot in the orchards of that 

 section cannot be given with any degree of confidence. 



Sulfur Du^t. ■ — Sulfur dust has been used with considerable 

 success in New York, Illinois, Michigan and Nova Scotia, but 

 it has not been. given sufficient trial in this State to warrant 

 the recommendation of its use at this time. 



Copper Sulfate-lime Bust. — The use of a copper sulfate- 

 lime dust in Nova Scotia has met with some success, but this 

 has not been tried in Massachusetts. 



Corrosive Sublimate. — This substance is used for disinfect- 

 ing pruning and renovating tools and the surface of wounds 

 before painting. (Corrosive sublimate, 1 part; water, 1,000 

 parts.) 



Corrosive sublimate may be purchased in tablet form at 

 drug stores. One tablet dissolved in 1 pint of hot water makes 

 a 1-1,000 solution. 



Corrosive sublimate is very poisonous. It should be plainly 

 labeled and kept out of reach of children and farm animals. 

 The solution should not be made in metal containers as most 

 metals are corroded by it. 



