The Fire Blight disease of pears, apples and quinces was found on the apricots in Colorado about 1902. It is of relatively little importance, owing to the economic position of the apricot in fruit - culture and also because this fruit is only occasionally affected. Fruits and twigs, when attacked by Bacillus amylovorus, present symptoms very similar to those developed on the pomaceous fruits mentioned above. (See Pear, page 323.)

Reference

Paddock, W. An apricot blight. Colorado Agr. Exp. Sta. Bul. 84:5 - 14. 1903.