ORCHARD SPRAYING. 



BV L. II. TAFT. 



Special Bulletin No. 37. 



SUMMARY. 



I. San Jose scale lias appeared in Michigan orchards, especially in 

 the eastern and western counties. 



IT. It attacks all kinds of fruit trees, although the sour cherry is 

 little injured, and unless measures are taken to control it, will destroy 

 them. 



III. The sulphur and lime mixture is the most effectual remedy. It 

 is also the cheapest and is worth all it costs for the prevention of fungous 

 diseases. 



IV. A good formula is fifteen pounds of sulphur, fifteen pounds of 

 lime, and twenty gallons of water. Boil one hour and dilute to fifty 

 gallons. 



Y. The so-called soluble oil remedies have not been found effectual 

 even when used at double strength. They have no value as fungicides 

 and unless carefully used are sometimes injurious to trees. 



VT, Potato blight and rot often cause severe losses during wet sea- 

 son::. Both can be prevented by using the Bordeaux mixture. 



VII. The black rot and mildev/, in seasons when the weather is 

 favorable for their development, often do m-uch harm to grapes. Both 

 of these diseases can also be held in check by the use- of Bordeaux 

 mixture. 



VIII. Orchards of all kinds should be sprayed with Bordeaux mix- 

 ture and an arsenite. The trees should be sprayed just before the blos- 

 soms open and all except the peach will be benefited by from one to five 

 other applications made at intervals of two weeks, beginning as soon as 

 the fruit is set. 



