DISEASES OF PLANTS. 237 



sprayiugs were given on one plat, the first applications on June 25, the 

 loss was 75 to 80 per cent. The early ai)i)lications were in every ca.se 

 the most successful, but no treatment equaled the earliest use of Bor- 

 deaux mixture, showing the decided advantage accruing from pre- 

 ventive treatment. By the destruction of all diseased leaves and* 

 grapes that may remain dried in the vineyard and careful spraying, 

 begun early, of all the green parts of the plant, together with attention 

 to the wood of the vines where the spores may lodge, it is considered 

 possible to prevent any considerable loss from black rot. 



Potato rot, H. P. Gould {Maine iSta. Bui. 28, pp. 4). — Brief notes 

 are given descriptive of potato rot and its effect uj^ou the plant and 

 tuber, together with a summary of experiments with Bordeaux mixture 

 and " fungiroid " for its prevention. The use of Bordeaux mixture as 

 a preventive gave the most satisfactory results. "Fungiroid" is a 

 fungicide which, it is claimed, is a powdered form of Bordeaux mixture. 

 The total yield was less and a greater percentage of rotten tubers were 

 present where "fungiroid" was used than where Bordeaux mixture 

 was employed, although "fungiroid" gave better results than where no 

 application of fungicides was made. 



A review of the diseases of the sugar cane in Java, I, J. H. 

 Wakker and F. A. F. C. Went {Med. Proe/sta. East Java, n. ser.,No. 

 22, pp. It, 2)1. 1). — Notes are given on the following diseases and fungi 

 attacking the sugar cane: TJstilago sacchari, Thielaviopsis a'thaceticus, 

 Colletotrichum falcatum, Marasmius sacchari, red rot, sour rot, Cercos- 

 pora Jcopei, Uredo kulinii, Coleroa sacchari, Leptosphwria sacchari, Cer- 

 cospora sacchari, C. vaginw, Pestalozzia sp., the " sereh disease," a yel- 

 low striped leaf disease, a striped disease of the roots, chlorosis of the 

 heart leaves, a heart disease of the young plants, and a red spot disease 

 of the leaves. 



A new disease of tobacco, J. Van Breda de B[AAN(il/efZ. h Lands 

 Plantentuin, A'o. 15, pp. 107, pi. 1). — The author gives a report of a dis- 

 ease of tobacco that has made its appearance in certain districts in 

 Java. The leaves become dark si)otted and greatly depreciate in value. 

 The cause is attributed to Phytophtliora nicotianw n. sp., a technical 

 description of the fungus being given, with illustrations. A study of 

 the biology of the j)arasite has been made and various attempts under- 

 taken for the repression of the disease. The author thinks it can be 

 prevented from spreading by careful attention to and frequent change 

 of the plant beds and by spraying the plants with Bordeaux mixture, 

 otherwise the disease threatens to become a serious enemy to tobacco 

 culture. 



Smut in wheat, W. M. Hays {Minnesota Sta. Bui. 46, pp. 362-308).— 

 Popular notes are given of the stinking smut or bunt of wheat. Dur- 

 ing 1895 a series of experiments was conducted for the prevention of 

 this disease by preliminary treatment with solutions of different 

 strengths of copi)er sulijhate and by the hot-water method of prevention. 



