526 Report of the Mycologist of the 



some disease. A recent experiment^ made at the New Jersey Ex- 

 periment Station shows that kainit, wood-ashes and gas-lime are 

 worthless as preventives of clnb-root in both turnips and cabbages. 

 Moreover, kainit and gas-lime wrought injury to the turnip plants. 

 Gas-lime injured cabbages also, but kainit stimulated the growth of 

 cabbages. Half-strength Bordeaux mixture and half-strength ammo- 

 niacal copper carbonate solution applied to the soil at the rate of 

 4,320 gallons per acre of turnips did not prevent club-root nor harm 

 the plants ; but one-half this amount, viz., 2,160 gallons per acre, 

 did serious injury to cabbage and did not prevent club-root. Corrosive 

 sublimate solution (one part corrosive sublimate to two thousand 

 parts water), applied at the rate of 4,320 gallons per acre, lessened 

 the amount of club-root in turnips and did not hartn the plants, but 

 one-half the quantity of the same solution applied to cabbages seriously 

 injured the plants and is therefore not to be recommended, although 

 it reduced the amount of club-root. (It appears that the cabbage is 

 a more delicate plant than the turnip.) Air-slacked stone- lime gave 

 good results with both tnrnips and cabbages. Seventy-five bushels 

 per acre is recom.mended. One hundred and fifty Imshels slightly 

 injured both turnips and cabbages. 



A large grower of cabbage at Bayside, N. Y., Mr. R. E. Forbell, 

 has for several years successfully used shell lime as a preventive of 

 cabbage club-root. This shell lime is made by burning the shells 

 of clams and oysters, and can be bought at the kiln for about seven 

 cents per bushel. 



"While the extended experience of Mr. Forbell had convinced him 

 of the efficacy of shell lime, the writer thought to place the matter 

 beyond doubt by making an experiment. Accordingly the following 

 experiment was planned by the writer and carried out by Mr. Forbelk 



2 New JfTsey Exp. Sta. Bull. No. 108, pp. 6-S. Same in New Jersey Exp. Sta. Report for 1894, 

 pp. 2J8-289. 



