151 



STATE HORTICULTURAL SOCIETY. 



Ten Days or Two Weeks Later, it will pay to repeat the previous 

 spraying, especially if the weather is wet or the curculio is serious. 

 This spraying should be repeated every ten days or two weeks until there 

 is danger of staining the fruit; stopping at least a month before pick- 

 ing time. 



On varieties especially susceptible to rot, an application of weak 

 copper sulphate may be made about two weeks before ripening. One 

 pound of copper sulphate to 150-200 gallons of water. No poison need 

 be used. 



Black Knot. Early in the spring a careful inspection should be 

 made of every tree, and all "black knots" cut out and destroyed. Cut 

 back several inches below the knot. Disinfecting cuts as for pear blight 

 is not necessary. Wild cherry trees harbor the disease and if diseased 



SPRAYING MONARCH PLUMS. 



Tree on left: Sprayed three times with commercial lime-sulphur (properly diluted). Fruit was pro- 

 tected from rot and foliage remained practically perfect through the season. Photo Oct. 4, 1912. 



Tree on right: Sprayed three times with Bordeaux mixture. Fruit was" protected from rot and foli- 

 age remained practically perfect through the season. Photo. Oct. 4, 1912. On an adjoining tree not 

 sprayed, the crop of fruit was entirely destroyed by rot and all of the foliage fell off by August. 



ones are near plum or cherry orchards, they should be destroyed, if 

 possible. 



GENERAL TREATMENT FOR CHERRIES. 



Cherry trees may be infested with San Jose scale. If found, the 

 treatment is the same as that recommended for the apple. 



Just Before the Blossoms Open, spray with dilute lime-sulphur, 

 or Bordeaux mixture. This is to prevent the rot and leaf spot troubles. 



