248 NEBRASKA STATE HOETICULTUEAL SOCIETY. 



erally affected with 'apple scab.' The stem of the flower in 

 many cases turned black, wilted, then withered, and the 

 flower fell because the parasitic fungi, 'apple scab,' had a 

 foothold in the flower cluster, and not directly because the 

 weather was cold enough to kill the blooms through frost. 



"Again, when sprayed trees are compared with unsprayed 

 trees right in the same orchard, where all experienced the 

 same cold weather, the flower clusters are mainly killed on 

 trees that are not sprayed, and apples that are sprayed escape 

 the cold and subsequently mature, and because the 'apple 

 scab' also is kept out of the trees, this is still better evidence 

 that it is not the cold weather but the 'apple scab' that killed 

 the flowers when spraying was not done. 



"In our experiment station orchard during the present sea- 

 son a full crop of Jonathan, Ben Davis, Gano, Ingram, Wine- 

 sap, and other leading commercial varieties was secured on 

 trees which went through the same cold weather as was ex- 

 perienced by adjacent unsprayed trees whose bloom or young 

 fruit was mostly killed before the warm weather of spring 

 came on. 



"... An outlying experiment was performed on an 

 adjacent orchard. This orchard embraces some 200 acres of 

 Jonathan, Ben Davis, Gano, and other commercial sorts. Be- 

 lieving from the previous year's observations that the loss of 

 flowers was due to 'scab' rather than to cold weather, a single 

 acre in this orchard was sprayed carefully by the Experiment 

 Station. This one acre had more good marketable fruit on it 

 this autumn than all of the rest of the 200 acres combined. 

 While the cold weather was apparently killing the blossoms 

 on unsprayed trees (which blossoms, however, were actually 

 being killed by 'apple scab') fruit was setting nicely on 

 sprayed trees where 'apple scab' was kept down, and a good 

 crop was the result." 



COST OF SPRAYING. 



The cost of spraying depends chiefly on the age and size of 

 the trees to be sprayed. In blocks of apple trees in Nebraska 



