264 



STATE HORTICULTURAL SOCIETY. 



(2). Ammonia Solution of Copper, (a) Carbonate of copper 3 oz, (b) Ammonia liq., 

 1 quart. Dissolve (a) in (b) and dilute to 22 gallons. 



He reports experimenting on two plats of Peacli-blow potatoes, growing 

 side by side, under the same conditions, and equal in area. The fungus 

 and consequently the disease appeared on the unsprayed plat. He 

 obtained only 164 pounds of small unmarketable tubers of jDoor flavor. 

 The disease did not appear on the sprayed plat on leaves or tubers; and 

 346 pounds of large tubers of fine flavor were produced. 



II. *ANTHRACNOSE OF CURRANTS. 





*Gloeosporium Ribis, (Lib.), Mont, and Desm. 



This note is published, on what is 

 apparently a comparatively new trouble 

 in the garden, to call attention to it, and 

 afford information that would seem im- 

 portant at the present time, although it 

 will appear that our knowledge is mea- 

 ger enough. Investigations on it begun 

 last summer, will be continued during 

 the coming season. 



The spots appear (Fig. 3) chiefly on 



'7 the upper surface but within the tissues 



^xof the leaves of certain species of the 



■^7 wild currant, and certain varieties of 



Y the cultivated species. It was first 



reported from America by the Eev. M. 



J. Berkeley in " Notices of North 



Amer. Fungi" Grevillea II, p. 83, (Dec, 



1873). It is there given as occurring in 



Connecticut on leaves of Rihes nigrum, 



Fig. 8.-Leaf (reduced vi) from the White — a Cultivated curraut, — Collected by 



Dutch Currant. The venation shown in detail p,V,orl(:ic Wrio-lnt nnrl in " TVaw T^.Tio-lnnrl 

 on the right hand together with the Leaf-blight. J-^iiarieS » 1 IgHt, _ aUQ in i> ew J^ngiana, 



(Giceosporium Ribis) . by KussclL Sincc then it has been 



found by Dr. C. H. Peck, on leaves of the Wild Fetid Currant (i?. 

 prostratum). It was found abundantly the past season on the leaves of 

 the White Dutch currant growing in the university garden, while the Black 

 Naples and the Crandall ( Rihes aureum) growing next the White Dutch were 

 free. Mr. C. M, Booth of Rochester reported it as severely attacking the Red 

 Dutch currant. Dr. C. H. Peck, the state botanist, reports it as abundant on 

 and injurious to cultivated currants near Albany. All agree as to its effects. 

 It appears in June or the early part of July, as small dark brown or black- 

 ish spots from ^ to 1 milliiaeter in diameter. (Fig. 3.) These may increase 

 rapidly; and as the epidermis is raised by the spores beneath these spots, 

 it becomes whitish, and a small pore appears in this raised surface through 

 which the spores (Fig, 4), held together by a mucilage, escape in a 

 little tendril. On account of the whitened epidermis the spots incline 

 to a rustier or grayer tint than they possess at an earlier date. The 

 general color of that part of the leaf infested by the fungus at this stage is 



'• *The common spotting of bean-pods, a disease of the Grape, one of Raspberry and Blackberry leaves and 

 other diseases are caused by various species of Ghxosporium. Mycologists are adopting the name Anth- 

 nacnose for all GloMsporium diseases, hence the above name. 



