Report of State Board of Horticulture. 75 



FOR PEAR SCAB, CRACKING, AND LEAF BLIGHT. 



These diseases, caused by two different species of fungi, 

 are successfully combated by one line of treatment. In most 

 sections all three diseases are found associated. Bordeaux 

 mixture has given the best results in this work. The first spray- 

 ing 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 troublesome. It may be almost entirely 

 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 pockets ; 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 barkbouud, 

 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. 



FOR BLACK ROT ON GRAPES. 



Spray w^ith bordeaux mixture just as the buds are swell- 

 ing, and again immediately after blooming with modified 

 bordeaux mixture. 



