APPENDIX B 



observed no evidences of dwarfing or injury other 

 than the pecuhar markings above described. 



Cause. — So far as I am aware no investigation 

 of the cause of this disease has been undertaken. 

 It looks much hke the well-known mosaic disease 

 of tobacco and other plants, the cause of which 

 has long been sought but never certainly dis- 

 covered. The mosaic disease of tobacco is known 

 to be very infectious. Whether this of the peony 

 is also capable of being transmitted from dis- 

 eased to healthy plants, I have not determined 

 as yet. 



Control. — Nothing with respect to control can 

 be suggested except destruction of diseased 

 plants, until we know more of the nature and 

 cause of the trouble. 

 The Anthracnose. 



This is a name I am giving to a disease affect- 

 ing the stems and leaves of the peony. So far as 

 I can find this has never been recorded before, 

 at least in this country. It appears, from my 

 observations in the Cornell University peony 

 plantation, to be a rather dangerous malady and 

 deserving of the attention of peony growers and 

 plant pathologists. 



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