lis Report of the JJepaktment of Ijot/,nv of the 



of the fruit spot as had English Morello. These two facts, 

 particularly the latter, are opposed to the theory that the spots 

 were due to Cylindrosporium padi. 



III. ANTHRACNOSE OF YELLOW TOAD-FLAX. 



On June 26, 1901, while passing through a peach orchard 

 infested with the common weed A'ariously known as Yellow 

 Toad-flax, Butter-and-Eggs, and Ramsted, it was observed that 

 some of the plants were dying. Upon making an examination 

 of the affected plants it was found that the trouble was due to 

 an anthracnose which was attacking the plants near the surface 

 of the ground. For a distance of two to four inches above the 

 surface of the ground the stems were pitted with elliptical 

 sunken spots almost identically like those produced by Colletotri- 

 chum antirrJiml on stems of the cultivated snapdragon, An- 

 tirrhinum majus?- 



Since the Yellow Toad-flax, Linaria vulgaris Mill., belongs 

 to the same family, Scrophulariaceie, as the cultivated snap- 

 dragon, it is not strange that it should be attacked by the snap- 

 dragon anthracnose. However, no case of the kind had ever 

 been observed, although we had sought carefully for it. In fact, 

 the disease was known only on the snapdragon, hence the fol- 

 lowing statement in our Bulletin- 179: '* So far as known at 

 present, this anthracnose attacks no other plant besides the 

 Antirrhinum. Therefore, the florist whose grounds are free 

 from the disease will have no trouble so long as he propagates 

 only from his own stock or from seed. In such a case the source 

 of danger is in diseased cuttings and plants from other estab- 

 lishments." 



Upon the discovery of an anthracnose on the Yellow Toad- 

 flax we immediately became interested to know if it was really 

 the same as the snapdragon anthracnose. It is important to 

 know this, because Yellow Toad-flax is a common weed of wide 



'For an account of anthracnose on snapdragon, see Bui. 170 of this. 

 Station 



'Stewart. F. C. An anthracnose and a Stem Rot of the Oultivated 

 £napdragon. N. Y. Agr. Exp. Sta. Bui. 179:109. 



