‘ CHAPTER III 
APRICOT DISEASES 
THE apricot is, as a rule, a very healthy tree. However, 
there are a few diseases which affect it to some extent. These 
troubles are practically identical with those of the peach and 
other stone-fruits. The more important diseases and injuries 
discussed on succeeding pages are: brown-rot, frost-injury, 
scab, Coryneum fruit-spot, rust and black-spot. During re- 
cent years most attention has been given to the last three. 
Doubtless brown-rot is the best-known disease of the apricot. 
Brown-Rot 
Caused by Sclerotinia cinerea (Bon.) Schrét. (or possibly S. laxa Ad. 
and Ruhl.) 
The brown-rot disease so common on peaches and plums is 
also prevalent on apricots in those regions where this fruit is 
cultivated: It is regarded as a serious discase of the apricot in 
Europe, causing greater total damage abroad than in America 
on account of the more extensive apricot-culture in European 
countries. In the state of California, however, considerable 
damage is done to young twigs, which are wilted and killed 
back, and to fruits on the tree, which are rotted as in the case 
of peaches. Early apricots are said to suffer most, probably on 
account of moisture relations rather than because of any varietal 
peculiarities. 
No definite schedule of control has been demonstrated, but it 
is recommended that self-boiled lime-sulfur be applied (1) just 
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