Report of Missouri Farmers' Week. 



565 



two thorough applications of the fungicide, one as the cluster buds 

 separate and one after the petals fall will suffice, but in cases of 

 severe infection three or four applications may be necessary. The 

 third application should be made about a week after the second, 

 and the fourth about three or four weeks after the blossoms fall. 



APPLE BLOTCH. 



Apple blotch is a disease which in some respects resembles 

 scab and is many times confused with it by growers. The severity 

 of the occurrence, the same as apple scab, depends very much upon 

 weather conditions. It appears, however, a little later in the sea- 

 son; its infection usually beginning to appear about the time the 

 scab infections discontinue. Some years infections begin early in 



the season, about bloom- 

 ing time or shortly after. 

 Other years they ap- 

 parently do not begin 

 until several weeks after 

 the blooming time. Ordi- 

 narily, however, they 

 begin about three or 

 four weeks after bloom- 

 ing. In some localities 

 and on some varieties 

 this disease has proven 

 extremely destructive to 

 the crop. Missouri 

 Pippin, Rhode Island 

 Greening, Mann, Smith 

 Cider, Ben Davis, Gano and Huntsman are the varieties which in 

 South Missouri appear to be most susceptible to this disease. Prob- 

 ably no varieties are immune to it, although York, Grimes and 

 Jonathan are among those least affected by it. It occurs on the 

 foliage and on the twigs, particularly water sprouts, as well as on 

 the fruit and occasionally does serious injury to the tree as well 

 as destroying the crop. 



The disease is very characteristic and after it has once been 

 pointed out should be easily recognized. It begins as small, brown, 

 slightly raised spots on the skin of the apple, spreading to large, 

 irregular blotches with jagged edges, which may cover the entire 

 surface, causing deep cracks and finally mummifying the fruit. 



Apple blotch (Phyllosticta't . 



