^2 MAINE AGRICUIvTURAL EXPERIMENT STATION. I9II. 



foliage and fruit. Its use with Paris green was not attempted. 

 Favorable results have in some cases been reported by growers 

 when used with the latter arsenical. 



Unusual conditions favorable to the production of injury were 

 prevalent this season. It is believed that future work with 

 more dilute solutions will furnish still better reasons for the 

 use of lime-sulphur as an orchard fungicide. The many experi- 

 ments referred to, as well as the favorable reports of practical 

 orchardists throughout the country, warrant Maine fruit grow- 

 ers in giving the new sprays a thorough trial. Aside from the 

 experimental plots, this Station purposes using home boiled lime- 

 sulphur of 31° to 34° Beaume density at a 1-40 dilution on all 

 its orchards. 



The additional advantage of the sulphur sprays lies in their 

 combined insecticidal and fungicidal powers. The same stock 

 solution used to control fungous diseases in summer is success- 

 ful at greater strength as an insecticide for sucking insects 

 against which arsenicals are ineffective. Such strengths must 

 be applied when the tree is not in leaf. 



Home Made vs. Commerciae Lime Suephur. 



Commercial lime-sulphur preparations now on the market 

 are not superior to concentrated home made stock solutions 

 when these are properly made and stored. The former are, 

 moreover, considerably more expensive. At present prices of 

 material the home made concentrate can be made at a cost of 

 one-third to one-fourth that of an equal volume of a commer- 

 cial solution if the materials are bought in quantity. This does 

 not include the original outlay for a cooker and barrels for 

 storage. The commercial preparation is a convenience, requir- 

 ing nothing but a knowledge of its density before diluting. The 

 home made concentrate can be made at any time and if properly 

 barreled and kept from freezing can be stored indefinitely. 

 Home made lime-sulphur can also at present be made cheaper 

 than the home-prepared bordeaux mixture, so far as cost of in- 

 gredients are concerned. The choice on grounds of economy 

 is, therefore, merely between the expenditure of money or time 

 and labor. 



