56 



NEBRASKA STATE HORTICULTURAL SOCIETY 



VarHeties Besistant to Bust. 



Cooper Early- 

 Oldenburg 

 Early Harvest 

 Sweet June 

 Yellow Transparent 

 Red Astrachan 

 Maiden Blush 

 Ben Davis 

 Gano 

 Winesap 



Mammoth Black Twig 

 Ralls Genet 

 Northwestern 

 York Imperial 

 Grimes Golden^ 



Varieties Susceptible to Bust. 



Red June 

 Wealthy 

 Whitney 

 Iowa Blush 

 Jonathan 

 Missouri Pippin 

 Grimes Goldeui 

 Prairie Crab and its rel- 

 atives and hybrids. 



REMOVING CEDAR TREES AS A PREVENTIVE OF RUST 



No less than fifteen Experiment Stations have discussed cedar 

 rust in their reports. Ten of them recommend to remove the 

 cedar, trees or at least to destroy the cedar apples, and some 

 suggest destroying the effected parts of the apple trees. A num- 

 ber of reports suggest spraying with some fungicide, like Bor- 

 deaux mixture. A few results of practical tests of spraying 

 have been reported, some fairly successful, some unsuccessful. 

 One of these is of particular interest. In 1890 the Vermont 

 Experiment Station- si^rayed an apple tree the limbs of which in- 

 terlocked with a badly diseased cedar tree, a second tree near by 

 having been left without spraying, as a check. The sprayed 

 tree had as many diseased leaves as the unsprayed one, but the 

 individual leaves were less seriously affected and remained on 

 the tree longer, so that the tree ripened some fruit, while the 

 unspraped tree lost both leaves and fruit. The test was re- 



The following 



peated in 1891 with about the same results. 



1 Grimes Golden is reported as being susceptible to rust, but trees on the Experi- 

 ment station grounds have shown none of the disease. 



2 Vt. Agr. Exp. Sta. Rpt. 1S90. pp. 1.39. 140; 1891. i). 133; 1892, pp. 8.3, 84. 



