CROWN-ROT, ARSENICAL POISONING AND 
WINTER-INJURY* 
J. G. GROSSENBACHER. 
SUMMARY. 
Crown-rot has been attributed to parasitic organisms, to 
arsenical poisoning and also to low temperatures. From the 
available literature reviewed in this bulletin and from recent 
observations (though there are many contradictions) there. 
seems little doubt about its being due to low temperatures, 
primarily. But the relation of the main secondary factors, 
such as the type of soil, soil moisture, stock-scion relations, 
and wood-maturity, to each other and to the primary cause, 
need investigation; and as a consequence proper preventive 
measures, based upon general principles, cannot be formu- 
lated, but long expensive tests must be made to determine 
these matters. 
*A reprint of Technical Bulletin No. 12. 
[288] 
