DISEASES OF PLANTS. 547 



due to the presence of parasites. The life histories of pests are treated with 

 only the detail necessary for their recognition in the course of the disease. 

 The main portion of the book is taken up with descriptions of diseases of cereals 

 and other field crops, vegetables, fruit trees, vines, forest trees, etc. In con- 

 clusion a chapter is given on the treatment of plant diseases, formulas being 

 given for the preparation of fungicides and insecticides. 



Eecent researches on Citromyces, G, Bainieb and A. Sartoby (Bui. Trimest. 

 Soc. Mycol. France, 29 (1913), No. 1, pp. 137-161, pis. 2).— This discussion 

 includes the study of the characters and culture of the following species of 

 Citromyces claimed to be new : C. minutus, C. ramosus, C. cesiw, C. muste, and 

 C. cyaneus. 



Notes on plant diseases of Connecticut, G. P. Clinton {Connecticut State 

 Sta. Rpt. 1912, pt. 5, pp. 341-35S, pis. 4). — The author discusses the occurrence 

 of plant diseases in Connecticut during the seasons of 1911 and 1912 and notes 

 a number which have not been previously reported in the State or which 

 are reported on new hosts. Among these are the orange rust of the apple 

 (Rocstclia aurantiaca), banana anthracnose (Gloeosporium musarum), bacterial 

 rot of cabbage {Pseudomonas campestris), pine rust of black currants (Gro- 

 nartium rthicola), damping off {Rhizoctonia sp.) and sun scorch of evergreens, 

 powdery mildew of hops {Sphcerotheca humuli), rust of Chinese juniper 

 (Gymnosporangium japonicum), grain smut of Kafir corn (Sphacelotheca 

 sorghi), stem canker of peaches (Phoma persiccc), stem canker of pines {Phoma 

 sp. ), rusts of pines {Peridennium delicatulum and P. pyriforme), fruit spot 

 of quince (Cylindrosporium pomi), crown gall of roses {Bacterium tume- 

 faciens), Phoma rot of swedes (P. napohrassicce), and crown gall of Chinese 

 wistaria {B. tumefaciens) . 



Report of the station for plant patholog'y, G. Lustneb {Ber. K. Lehranst. 

 V/ein, Obst u. Gartenbau Geisenheim, 1911, pp. 112-161, figs. 17). — An account 

 is given of some after results of the previous year's inundation of the Rhine, 

 such as death of maple and plum trees; of injuries due to late frosts, as 

 observed in case of apple, pear, raspberry, elder, grape, etc. ; of sunburn on 

 cherries; of losses due to sprays, and to weather, including lightning, drought, 

 and wind; the larger part being devoted to animal injuries and protection 

 therefrom. 



Observations and studies on injuries to veg'etation in Ratibor-Plania, R. 

 Otto {Ber. K. Lehranst. Obst u. Gartenbau Proskau, 1911, pp. 6-^-66. In 

 Landic. Jahrb., 43 {1912), Ergdnzungsb. 1). — In this part of a more general 

 report the author states that the injuries to vegetation in the neighborhood 

 of chemical works were most marked to the leeward of the works but that 

 climatic and other causes involved also caused injury to vegetation. 



[Plant diseases in Southern Nig'eria], F. Evans {Ann. Rpt. Agr. Dept. South. 

 Nigeria, 1912, pp. 6-9). — This is compiled from the report of C. O. Farquharson. 

 Two root diseases of Hevea brasiliensis are noted, Fonies scmitostus and 

 Ilymenochwte noxia. Of these the former (also called Polyporus lignosus) is 

 able to advance through the soil and reach other trees near by. It also grows 

 on decaying stumps, and one case has been reported of its occurrence on cacao. 

 The latter fungus was found to be about as frequent and destructive as the 

 former, and, moreover, to be not uncommon on cacao trees in the colony. 



Pink disease {Corticium salmonicolor) is said to be common in the Sapele 

 district, the trees being most commonly attacked at the forks. The whole 

 crovni often dies. It is believed to be independent of wounding in its attack on 

 the trees. 



Cacao is reported to be attacked also by canker ascribed to Phytophthora 

 faberi or Spioaria colorans. Very similar effects are produced by another 



