140 



REPORT OF STATE BOARD OF HORTICULTURE. 



portant, but in some places it has done an immense amount 

 of injury." 



FOR PEAR SCAB, CRACKING, AND LEAF BLIGHT. 



These diseases, caused by two different species of fungi, 

 are successfully combatted by one line of treatment. In 



most sections all three dis- 

 eases are found associated. 

 Bordeaux mixture has given 

 the best results in this work. 

 The first spraying for these 

 diseases should be made Just 

 before the buds swell. In ten 

 or twelve days the second 

 treatment should be given, 

 followed by a third and fourth 

 at the expiration of two and 

 four weeks, respectively. In 

 the nursery, pear blight is 

 often exceedingly trouble- 

 some. It may be almost en- 

 tirely prevented by spraying 

 five or six times with the 

 bordeaux mixture, making the first application when the 

 leaves are about one-third grown, and the others at intervals 

 of ten or twelve days throughout the season. The leaf blight 

 of the cherry, plum, and quince, which so seriously affects 

 trees, both in the orchard and nursery, may be held in check 

 by using bordeaux mixture. 



FOR PRUNE AND PLUM ROT. 



Spray with bordeaux mixture as the buds are swelling, and 

 again when the fruit has attained the size of a bean, with 

 modified bordeaux mixture. 



FOR GUMMOSIS. 



Cut out gum jDockets, split the outer bark about one-eighth 

 of an inch deep from roots to branches on three sides when 

 sap begins to flow, as all gum-infected trees are barkbound, 

 and wash with bordeaux mixture ; care must be taken in 

 splitting the bark not to cut through to the wood ; repeat in 

 midsummer, if necessary. 



