30 NEBRASKA STATE HORTICULTURAL SOCIETY. 



respondents said that their trees were " not troubled with blight," and 

 sixteen gave no answer to this question. 



Summary. 



In bringing together the results of this inquiry in the form of a 

 summary, I shall simply indicate, with few comments, the direction 

 of the evidence gathered above. ISS' 



Varieties Affected. 



The evidence indicates that certain varieties of apple trees are less 

 affected than others, but that few if any varieties are proof against the 



disease. 



Conditions. 



It appears that such conditions as hot, moist locality, rich soil, lack 

 of free circulation of air (on account of protection by wind-breaks, 

 etc.), cause a watery or succulent growth of the tree which is favorable 

 to blight. 



On the other hand, high rolling, well drained ground of north 

 slope and free circulation of air offers the most favorable conditions 

 for hardy growth of the trees, which are therefore less liable to blight. 



How to Check the Disease. 



So far as yet known the best way to check the disease is to cut off 

 the blighted twigs several inches below where they are dead and burn 

 them immediately. 



Root pruning may cause a decrease in the water supply and thus 

 be valuable in checking the succulent growth, but in many cases, es- 

 pecially in nursery stock, this is objectionable, because it is too great 

 a check to growth. 



Stopping cultivation and seeding to clover may check too rapid 

 growth. The effect on the tree of salt, lime, and ashes applied to the 

 surface of the ground needs further investigation. 



Spraying has thus far proved to be of no value in checking the 

 "Fire Blight" in diseased trees or in protecting them from attack. 



Finally, if you are going to plant an orchard and wish to guard 

 against " blight/ 7 the indications are, for Nebraska: First, plant va- 

 rieties lea^st liable to blight; second, plant on high, rolling, well drained 

 ground of northerly slope; and last, plant no wind-breaks, except pos- 

 sibly on the south or southwest, at some distance from the orchard. 



