56 EXPERIMENT STATION EECUKD. 



of about 60 bu. over the yield from control rows. The fungicide known an Bodo 

 compared favorably with standard Bordeaux mixture, while the third was not as 

 eflScient as either of these two. Boxal is primarily an insecticide and was not used 

 early enough to compare its merits with those of Paris green. 



The relative value of applications at different dates was tested, the sprayings being 

 made July 2 and 16 and August 4 and 23. No difference was observed in any of the 

 rows until after the third spraying. Soon after this time those plants which did not 

 receive the application of August 4 were l)adly affected by tip burn, and the stems of 

 many died. The fourth spraying did not appear to make much difference in the 

 character of the foliage. Those plants that had received only the first and second 

 sprayings were severely affected by disease, and those which received the third 

 application continued to thrive whether they received the fourth application or not. 

 The greatest yield obtained was from the plants receiving the four applications. 



In the experiments with potato scab the seed was disinfected with corrosive-sub- 

 limate solution, formalin, formaldehyde gas, formalin vapor, sulphur fumes, sulphur, 

 and bran, the latter being used at the request of several potato growers, it having 

 been stated that trials where bran were used showed that it not only served to pre- 

 vent seal), but at the same time was a good fertilizer. The results of the different 

 treatments are shown, from which it is apparent that the corrosive-sublimate solu- 

 tion and the formalin solution were both practically successful in preventing scab 

 and were of about equal value. AVhen the ease of application of the formalin solu- 

 tion and the poisonous nature of the corrosive sublimate are considered, the former 

 is preferred. None of the other applications were of practical success. The sulphur 

 gas and formalin gas, which were both considered promising in the previous year's 

 work, are considered without practical value and cannot be recommended for field 

 use. The formalin vapor and wheat bran were so evidently valueless as to deserve 

 no further trial. 



Diseases of sugar cane in Bengal, A. T. (tage {Agr. Ledger, 1901, No. 5 {Crop 

 Disease and Pest Ser., No. 5), pp. 71-96, pi. 1). — A report is given of an examination 

 of a large series of diseased sugar canes which had been collected from a number of 

 different regions. Of 79 sets examined, 10 were affected with the fungus CoUetotri- 

 chum falcatum alone, 7 were infested with the beetle D'moderns minutus, while the 

 remainder showed both fungus and beetle associated in the destruction of the cane. 

 The percentage of disease observed varied from 1 to 75 per cent, with an average of 

 about 23.5 per cent. The author is inclined to believe that the beetle is more 

 destructive to cane than the fungus. 



The dying of the cane in the fertilizer test garden, J. D. Kobus {Meded. 

 Proefstat. Ooost Java, 3. ser., 1901, No. 30, pp. 11).— The object of this experiment was 

 to determine whether any connection exists between fertilizers and root rot. Plats 

 were fertilized with sulphate of ammonia, stal)le manure, sulphate (jf annnonia and 

 stable manure, and with various native fertilizers made from Arachis, Ricinus, and 

 Eriodendron. These fertilizers are highly nitrogenous, containing, respectively, 6.1, 

 5.2, and 4.6 per cent nitrogen. 



"When root rot made its appearance, the plants on the stalile manure and sulphate 

 of ammonia plats were first and most affected. These plants sent ujj many more 

 shoots than those on the other plats, l)ut owing to the disease the total product of 

 these plats, was but slightly greater than that of the others. The sugar content 

 of the sap was markedly less on these plats than on those fertilized wath sulphate of 

 ammonia alone. It appears from the above that the application of large amounts of 

 organic matter increases the tendency toward root rot, and the author offers a hypo- 

 thesis to account for this phenomenon. He observed that the plats near flowing 

 water were more free from the disease than others, although no material difference 

 could be detected either in the moisture content or in the amounts of organic matter 

 present. He concludes, therefore, that the organic matter in decaying draws heavily 



