AGRICULTURAL EXPERIMENT STATION. 



109 



Leaf Blight of the Peak. 

 Entomosporium maculatum, Lev. 



Attention has been called to the above fungus as doing damage 

 to the leaves and fruit of pear trees in Maine. 



The letters from Mr. Moore given below will indicate the 

 nature of the inquiries. Mr. Moore's pear trees are located upon 

 Diamond Island, Portland Harbor. 



May 24, 1892. 

 Horticulturist Maine Experiment Station. 



Dear Sir : — I enclose a few leaves from my Clapp's Favorite 

 pear tree. 



The leaves began to have this appearance two seasons ago, on 

 one branch of the tree. Last year more branches were effected, and 

 this year it seems to have spread over the whole tree. Is it Pear 

 blight ? and is there any remedy ? 



Yours Respectfully, 



Arthur D. Moore. 



The above letter shows 

 how rapidly this disease ^. 

 spreads, and the neces- ^ 

 sity of applying remedial 

 measures as soon as pos- 

 sible. We recommended 

 the use of the ammoni- 

 ated carbonate of cop- 

 per solution, made as fol- 

 lows : 



Dissolve three ounces 

 of carbonate of copper in 

 two quarts of commercial 

 ammonia water ( 22 ° ) 

 and dilute with water to 

 thirty-five gallons. 



The first application should be made when the leaves are half 

 grown and repeated according to the severity of the case every 

 three or four weeks during the season. 



