628 



Journal of Agriculture, Victoria. [15 Oct., 1919. 



couidia, being able to gain entrance only through wounded tissue. 

 (Plate 2, Fig. 3.) 



(6) Sclerotinia sp. 



In its action the disease produced by tJiis fungus is similar m 

 a,ppearance, and might at first be easily mistaken for that caused by 

 Botrytis. In culture the sclerotia failed to produce ascophores. As 



Plate 2. 



with Botrytis, the mycelium when brought into contact with the vines 

 was unable to enter through sound tissue, but caused rapid injury and 

 death when in contact with injured plants. It was noticed that the 

 general point of attack was at the ground level or slightly below it, or 

 at the point where injuries are more likely to occur during cultural 

 work. Sometimes, though not often, the disease was observed at the 

 forking of the vine close to the ground. 



