248 EXPEKIMENT STATION RECORD, [Vol. 37 



spores produced thereon infect the spring crops. The Greenfield outbreak is 

 thought to have originated from a crop planted in autumn. 



The relation of weather to the development locally of the fungus is discussed, 

 as are also subordinate related factors and some proposed methods of treat- 

 ment, which include destruction of all aftermath and self-sown grain with 

 avoidance of autumn and late spring sowing and of heavy nitrogen fertilizing. 



Stalk disease of wheat, E. Foex (Bui. Soc. Path. Vcg. France, 1 (19H), No. 

 1, pp. 26-SO, pi. 1). — A brief discussion is given of foot disease of cereals, said 

 to be due principally to Ophiobolus graminis, which works around the base of 

 the stalk, and to Leptosphcsria heipotrichoides, appearing higher on the stem, 

 around which it also works its way more gi-adually. O. herpotrichus has been 

 observed to cause stem weakening in cereals, as has also Cercosporella herpo- 

 trichoides, which has been considered a conidial form of Leptosphseria. Germi- 

 nation tests with these fungi are discussed. 



Diseases of beans, W. G. Sackett (Colorado Sta. Bui. 226 (1917), pp. 21-Sl, 

 figs. 6). — Descriptions are given of a number of diseases of beans known to 

 occur in Colorado, with suggestions for their control. 



Among the more troublesome diseases are bacterial blight (Pscudomonas 

 phaseoli), pod spot or anthracnose (Colletotrichum lindemuthianum) , bean rust 

 due to Uromyces appendiculatus, and a new disease to which the name bean 

 streak has been given. The last disease was first observed in Colorado in the 

 summer of 1916. It attacks stems, leaves, and pods, producing symptoms similar 

 to those present in plants affected with bacterial blight. On the pods rusty, 

 orange-brown dlscoloratlons later appear. The leaves are destroyed and the 

 plants become defoliated before the crops mature. The cause and methods 

 of control are being further Investigatetl. 



Control of clubroot of crucifers, O. Ai'Pel and O. Schlumberqeb (Mitt. K. 

 Biol. Anst. Land u. Forstxc, No. 15 (191-i), pp. lS-15). — Among the more favor- 

 able results tabulated as obtained from tests of preparations for reducing 

 infection of cruciferous crops by Plasmodiophora brassic(E in the soil, those 

 given by 2 or 3 per cent formalin and those by certain proprietary preparations 

 were almost equal In value. 



Phoma disease in crucifers, R. Laubhst (Mitt. K. Biol. An»t. Land u. 

 Forstic., No. 16 (1916), pp. 10-12, fig. J). — It is considered probable that the 

 same species of Phoma causes the more or less similar diseases of different 

 cruciferous plants noted during recent years at points In Holland, France, 

 Germany, Australia, and North America. 



Corynespora melonis, Kkuger (Milt. K. Biol. Anst. Land u. Farsttc, No. 15 

 (1914), pp. 16, 11). — C. tnclanis, the cause of leaf scorch of cucumbers, said 

 to cause loss in England, Holland, and Germany, is briefly described and dis- 

 cussed as to effects and dispersal, with suggestions regarding seed disinfection. 



Flax blight, G. Arnaud (Bui. Soc. Path. Veg. France, 1 (1914), No. 1, pp. 

 S8-41, fig. 1). — Astcrocystis radicis is said to cause a blight of cultlvate<l flax 

 in Flanders by attacking the roots and lowering water absorption. The Intra- 

 cellular behavior of the fungus is descrlbetl. Alkalis seem to favor, acids to 

 hinder. Its development. Fungicides are diflicult of application. Rotation of 

 crops Is recommended, though the parasite attacks also a number of common 

 crops, which are named. 



Studies in the dying out of pepper vines in the Dutch East Indies. — II. 

 Pepper culture on Banka, A. A. L. Rutgers (Depf. Landb., Nijv. en Uandel 

 [Dutch East Indies], Meded. Lab. Plantcnzickten, No. 19 (1916), pp. 36, pis. 

 n). — This contribution. In continuation of one previously noted (E. S. R., 35, 

 p. 349), besides giving a brief history of pepper culture and Its forms and 

 characteristics on the island of Banka, deals briefly with such drawbacks as 



