no EXPERIMP^NT STATION RECORD. 



wlK'ii the at hick was less serious it left the plants unsightly and not 

 nearly so vigorous aiul thrifty as healthy plants. Specimens submit- 

 ted to li. 1). Ilalstead are reported as affected by a species of 8ep- 

 toria. Tiirce fungicides were tested as preventive measures, namely, 

 l>otassiuin sulphide, aminoniacal copper carbonate, and Bordeaux mix- 

 ture. The Uordeaux mixture proved the most effective and the potas- 

 sium sulphide the least. The treatment suggested is to remove and 

 burn all the diseased foliage and cover the remaining foliage with Bor- 

 deaux mixture to i)revent further development of the disease. Five or 

 six applications will usually be sufficient for the season. 



ExpcrimenU in the treatment of potato scab (pp. 561-570). — A reprint 

 from Bulletin 49 of the station (E. S. E., 4, p. 925). 



Some celery cJiseases (pp. 570-585). — A reprint from Bulletin 51 of the 

 station {E. S. R., 4, p. 925). 



Experiments in preventing leaf diseases of nursery stocic in iccstern 

 Xen- Yoric (pp. 012-077), — A reprint of a paper by D, G, Fairchild, pub- 

 lished in Journal of Mycology, 7, pp. 240-204 (E. S, E., 4, p, 955). 



On the use of blue vitriol for pourridie of grapes, J, Bufoxtr 

 -{Rev. Tnternat. Yit.et (Enol.^l [1891),Xo.2^pp.75-77). — Since 1S8S exj^eri- 

 ments have been conducted at the station of Lausanne in combating 

 the pourridie of the grape. They were conducted in a variety of soils 

 and with various fungicides. Other exi)eriments were conducted at 

 Champ-de-1'Air on plants grown in i^ots and artificially infected. Some 

 experiments were successful, while others failed. 



The disease is due to various causes, the principal of which are 

 Dematophora necatrix and Agaricus melleus. General preventive meas- 

 ures, such as ai^ration and draining of soils and the use of more resist- 

 ant stocks, are recommended. When the disease once gains a firm 

 hold in a vineyard the complete destruction of all vines together with 

 their roots is advised. Before setting new^ vines in their places the 

 soil should be disinfected by watering it with a 3 per cent solution of 

 copper sulphate. AVhere the disease is just appearing the roots of the 

 affected plants and 2 or 3 rows about them should be laid bare in the 

 spring and washed and the soil well watered with the 3 per cent solution 

 of copper sulphate. The eftect of the treatment may not be visible the 

 first year and it may be necessary to repeat the treatment the second 

 spring, but it is believed that the use of the blue vitriol in the manner 

 suggested will ultimately be attended with positive results. 



Fifth Annual Report of the Halle Station for experiments in 

 the repression of nematodes and for plant protection, 1893, ]M. 

 HoLLKUxXG {pp. ^J).— During the year 410 experiments of several kinds 

 were made, chiefly in the lin« of fertilizing, but also toward checking 

 injurious insects and plant diseases. 



Experiments on the application of various fertilizers to "beet sick" 

 soil were carried on at Korbisdorf, Trotha, Biere, Atzendorf, and Bleck- 

 eudorf, 5 plats at each place being treated, respectively, with potassium 



