8.4 WORCESTER COUNTY HORTICULTURAL SOCIETY. [1891. 



common on the Flemish Beauty, White Doyenne and some other 

 varieties. 



For the insect, Paris green is effectual and the Bordeaux 

 mixture has proved as efficient as for the apple scab. While 

 the " fire blight," so called, is not of such a nature as to be 

 aifected by the outward applications of fungicides after it has 

 attacked the tree, we believe that this mixture will destroy any 

 germs that may come in contact with it, and that by attention 

 to the proper condition of the soil, manuring and cultivating, 

 we may very largely overcome this most destructive disease. 



The PlUxM. The plum curculio and the black wart, also the 

 rotting of the fruit, have been found to succumb to the Bordeaux 

 mixture and Paris green. 



The only trees on the College grounds upon which the fruit 

 was not stung by the curculio, or that did not' rot as soon as it 

 approached maturity, were those treated with the above com- 

 ))inations, and as other stations report similar favorable results, 

 we feel warranted in urging its general use. The sulphate of 

 copper solution should be applied to the branches to destroy 

 any germs or spores of the leaf blight or plum wart that may be 

 present before the leaves unfold. After this, from the time 

 the blossoms fall until July 1 the combined mixture should be 

 used. After this time, either the Bordeaux mixture or the 

 ammoniacal carbonate of copper may be used. The latter will 

 probably be the more satisfactory, as it does not disfigure the 

 fruit. 



The plum wart we feel sure was largely prevented from de- 

 veloping by this treatment, but the few that may secure a hold 

 on the branches may certainly be destroyed by the kerosene paste. 



The Grape. In the College Vineyard the past season the 

 l)enefits derived from the use of the Bordeaux mixture, and we 

 have similar reports from others whenever used, were such that 

 there seems to be no doubt that this is a reliable remedy for 

 about all of the fungous diseases of the vine. The great objec- 

 tion to it is the adhesion of the material to the fruit if applied 

 late in the season, but after the work of the rose bug has ceased, 

 I see no reason why the ammonia carbonate of copper may not 

 be used with equal effect. 



