448 EXPERIMENT STATION RECORD. 



but the plants were injured by insects so that their growth was seri- 

 ously interfered with, therefore no report could be made of the value 

 of the spraying. The fungicides seemed to have no effect on nastur- 

 tium blight, and scarcely adhered at all to the leaves. The experiment 

 with sweet peas tested not only the effect of fungicides but also the 

 effect of different depths of planting. The largest number of flowers 

 were obtained where the seeds were planted 3 in. deep and hilled up 

 2 in. Where seeds were first soaked in Bordeaux mixture, rolled 

 in sulphur and corrosive sublimate, and planted 2 in. deep, all gave 

 good results. The canna plants were free from fungus diseases, but 

 the foliage of some plants was injured by the application of soda-Bor- 

 deaux and hydrate. The mildew of dahlias appeared abundantly on 

 unsprayed sections during the autumn but it was easily checked by the 

 use of fungicides. Hollyhocks sprayed with different Bordeaux mix- 

 tures, receiving in all 13 sprayings, were almost entirely free from the 

 leaf spot which appeared on the check plats early in the season and 

 continued until its close. The hollyhock rust (Puceinia malvacearum) 

 was found almost without exception on check plants, while but one 

 sprayed section showed any disease. The sprayed peony plants 

 bloomed much less abundantly than the unsprayed plants and no dis- 

 ease was observed on any. 



Experiments with fungicides (pp. 330-344). — The author gives the for- 

 mulas and methods of preparation of the fungicides used in the preced- 

 ing experiments, namely, Bordeaux mixture, soda-Bordeaux, potash- 

 Bordeanx, and cupric hydrate. 



Experiments in infecting soil ivith potato- scab fungus (pp. 355-359). — 

 Experiments are reported in which scabby potatoes were (1) spaded 

 into the soil; (2) steamed 20 minutes and then spaded in; (3) applied 

 to the surface of the soil and allowed to remain over winter, and (4) fed 

 to stock and the manure applied to the soil. The results are tabulated 

 and the following conclusions drawn : 



Scab was greatest where the untreated potatoes were spaded in in 

 September, followed closely by the case in which steamed potatoes 

 were spaded in. The plats which received manure gave results which 

 indicated a very limited presence of the scab fungus. While the exper- 

 iment was somewhat limited, it was interesting to notice the almost 

 entire absence of scab where the infested potatoes were fed to cattle 

 and the manure placed on the land. This seems to indicate that there 

 is little danger in disposing of scabby potatoes in this manner. 



An additional experiment is reported in which a number of solanace- 

 ous plants, together with a miscellaneous lot, were tested to ascertain 

 their susceptibility to the scab fungus. Of the solanaceous plants, only 

 the roots of tomato, pepper, tobacco, and Datura stramonium showed 

 any evidence of the fungus. Sweet potatoes gave no indications of the 

 disease. Artichokes, cardoon, chicory, salsify, parsnips, and 6 varieties 

 of radishes were tested, and while all the varieties of radish were more 

 or less disfigured by scab, the other plants remained free. 



