134 E,EPOKT OF THE UePAKTMENT OF BoTANY OF THE 



wood and the formation of fruit buds for next year. How great 

 will be the damage from this cause can not be determined until 

 next season. As already stated, some plantations were almost 

 completely defoliated by July 10. By July 22 many plantations 

 were completely defoliated and many more had lost from one- 

 half to two-thirds of their foliage. As a rough estimate we would 

 say that in the region between Highland and Kewburgh probably 

 two-thirds of all currant leaves (excepting black currants) had 

 fallen by July 22. About this time Septoria rihis also appeared 

 and assisted in completing the destruction. At what time the 

 defoliation was completed we are unable to say, since we did 

 not visit the region between July 22 and September 2. On the 

 latter date very few green currant leaves were to be found ; and 

 yet, normally, currants hold their leaves until heavy frost. On 

 the station grounds, at Geneva, sprayed currants of many differ- 

 ent varieties were in nearly full foliage as late as October 15. 



The disease was more destructive in old plantations than 

 among young plants. Plants in the nursery row were attacked 

 latest of all and consequently suffered least. It was a common 

 observation among fruit gix>wers that the disease was more 

 severe on high, dry soil than in lower situations where the soil 

 was heavier and naturally moister. Our own observations con- 

 firmed this. The disease was also somewhat less severe on plants 

 which were partially shaded. It is a common practice in the 

 Hudson Valley to plant currants between the rows in) peach 

 orchards. Hence, it comes about that many bushes are in par- 

 tial shade. The shaded plants were not attacked so early as 

 were those fully exposed to the sun. 



Concerning the amount of damage done by currant anthrac- 

 nose elsewhere than in the Hudson Valley, we have little infor- 

 mation. At Geneva, some plantations lost a large part of their 

 foliage because of anthracnose, and it was present in greater or 

 less amount in almost all plantations; but the damage done by 

 it does not appear to have been great. Prof. Craig informs us 

 that the disease was common at Ithaca. 



