DISEASES OF PLANTS. 353 



and 5.3 per cent for Pyrox, and from 21.7 per cent of rot for the lime-sulphur 

 and arsenate to 7.2 per cent for the * : 6 : 50 Bordeaux mixture and arsenate 

 spray as compared with an average of 33.6 per cent of rotted fruit on the 

 check j)lats. 



Bitter plums, P. Sorauer (Ztschr. Pflanzenkrank., 21 (1911), No. S, pp. 145, 

 I'lG). — Attention is called to the presence of a fungus, Ccphalotliecium roseum, 

 on ripe plums which were offered for sale in the markets of Germany. The 

 affected plums were bitter and had small white spots over their surfaces, from 

 which after about 2 weeks the fruit bodies of the fungus developed. 



A thread blight on Para rubber, camplior, etc., K. Bancroft {Agr. liiil. 

 Straits and Fed. Malay States, 10 {1911), No. 4, PP- 110-114, pi. i).— Attention 

 is called to the recent appearance on Para rubber and camphor trees (Cmna- 

 nhomidii camphora) of a disease calle<l thread blight, due to a fungus which 

 apparently belongs to either the genus Hypochnus or the genus Corticium. 



The leaves of the attacked trees wither and hang down, often becoming 

 matted into dense masses. The young twigs also wither, the buds die, and 

 finally the leaves are shed. White rhizomorphic strands are found on the 

 affected branches and spread from them to the under sides of the leaves, where 

 they repeatedly branch until the entire under surface of the leaf is covered 

 v/ith a white mass of fine fibrils. No spore-bearing structures have been found, 

 and the fungus is disseminated l>y infested leaves being blown to other trees 

 where they adhere t-o the branches or twigs by means of the dense mycelial 

 growth. 



The remedies suggested are the collection and burning of all fallen leaves and 

 twigs from diseased trees. 



A disease of seedlings of Palaquivim oblongifoliura, K. Bancroft (Agr. 

 Bui. Straits and Fed. Malay States, 10 (1911), No. 4, pp. 108-110).— The author 

 describes as new Lwstadia palaquii. a fungus whicli produces brown spots on 

 the leaves of seedlings of P. oblongifollum. These spots increase in size until 

 they often become confluent over nearly the entire area of the leaf, while the 

 remaining portion of the leaf becomes yellow. The leaf finally withers and 

 dies, followed by the withering of the young part of the stem, and eventually 

 by the death of the seedling. A description of the fungus is appended. 



A root gall of begonias, K, Schechner (Osterr. Gart. Ztg., 6 (1911), No. 5, 

 pp. 161-167, figs. 4). — A description is given of a root gall of this ornamental 

 plant when grown under glass, due, it is claimed, to attacks of the nematode, 

 Hetcrodera radicicola. 



Report of the department of botany, C. Brooks (Netv Hampshire Sta. Bui. 

 151, pp. 21-23). — Self -boiled, home-boiled, and commercial lime-sulphur mix- 

 tures as fungicides have been tested both alone and in combination with the 

 various insecticides. The lime-sulphur sprays produced no injury to apple trees 

 and controlled the diseases during 1908 and 1909, but experiments made in 

 1910 indicate that more frequent applications of lime-sulphur mixtures will 

 have to be made than of Bordeaux mixture during rainy seasons, as the 

 sulphur mixtures wash oft' the trees more readily than the copper sprays. 

 Arsenate of lead and arsenite of lime when combined with lime sulphur gave 

 no injury, while Paris green when used with commercial lime-sulphur produced 

 slight injuries if there was no excess of lime present (E. S. R., 22, p. 747). 



Special attention has also been given to leaf spot of apple, apple scab, fruit 

 spot of apple, and tomato diseases. 



Recent advances in our knowledge of lime-sulphur, J. P. Stewart (Proc. 

 State Hort. Assoc. Pemi., 52 (1911), pp. 176-181, figs. 2).— A brief review is 

 given of the development of lime-sulphur as an insectide and fungicide for 

 orchards from its inception on the Pacific Coast to its present prominent 



