. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. 14 THE AGRICULTURAL NEWS. Januaey 6, FUNGUS NOTES. EXPERIMENTS ON THE CONTROL OP' LEAF RUST OF GROUND NUTS. A leaf rust of ground nuts, due to Credo anic/iidis, has been of common ocrurrence in the West Indies during recent years, and has been under more particular observation in the experiment plots planted with imported American , in Dominica, Montserrat and St. Kitts. Some account of it is given in the West Indian Bulletin, Vol. IX, pp. 157 and 167. ^^~W .-?^^'?'-1 „? The disease appears to be m
. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. 14 THE AGRICULTURAL NEWS. Januaey 6, FUNGUS NOTES. EXPERIMENTS ON THE CONTROL OP' LEAF RUST OF GROUND NUTS. A leaf rust of ground nuts, due to Credo anic/iidis, has been of common ocrurrence in the West Indies during recent years, and has been under more particular observation in the experiment plots planted with imported American , in Dominica, Montserrat and St. Kitts. Some account of it is given in the West Indian Bulletin, Vol. IX, pp. 157 and 167. ^^~W .-?^^'?'-1 „? The disease appears to be more usually confined to the older leaves, but this is not always the case; while the opin- ions of different observers throughout the islands as to the amount of damage due to it have been somewhat conflicting. The same is true with regard to the effect of control measures in reducing its prevalence. In the season of 1909, Mr. W. Piobson, Curator of the Botanic Station, Montserrat, e.\press- ed the opinion that it undoubtedly affected the yield obtain- able, by shortening the life of the plants and causing shrink- of the nuts. In the following year, Mr. A. J. Brooks, then Master-in-Charge of the Agricultural School, Dominica, con- ducted experiments to compare the weight of nuts from, and the number produced by, infected and healthy plants. He found that the presence of the fungus did not have any appreciable effect on the values obtained in each case, and concluded that the damage due to it was negligible. More- over, he reported that spraying with Bordeaux mixture and dusting the plants with a mi.^ture of lime and sulphur did not reduce its spread. But in the same year, Mr. Itobson found that the results obtained by spraying with Bordeaux mixture supported the theory that the fungus shortens the life of the plants. His results were based on the general appearance of the sprayed and unsprayed plots, and on comparisons of the yields obtained from each. He found that the secti
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