542 EXPERIMENT STATION RECORD. 



tbat natural or artificial cold may produce in winter cereal plants alterations 

 and discolorations of the membranes and vessels, which may be followed by 

 parasitic attack in the weakened portions. Anatomical changes are described 

 and illustrated. 



Partial frost injury of winter cereals confused with animal injuries H. 

 ZiMMERMANN {Ztschv. Pflanzenlcrank., 23 {1913), No. 6, pp. 332-334, pis. 3).— 

 Frost injury of winter cereals resembling in its last stages that from gnawing 

 animals is described and illustrated. The resemblance to animal injury is 

 completed by attacks of semiparasitic fungi, resulting in blunt abscission of 

 the weakened portions. 



Ophiobolus herpotrichus and stem rot of cereals, E. Voges {Ztschr. 

 Oaningsphysiol., 3 {1913), No. 1, pp. Jf3-83, figs. 5). — This is a more extended 

 account of studies previously noted ( B. S. R., 28, p. 445. ) 



It is stated that 0. herpotrichus is not the specific or exclusive cause of 

 stalk disease or foot rot of cereals (this fungus not being able to attack the 

 plants under normal conditions), and that the disease may be found as a 

 secondary phenomenon in association with one or more of several organisms 

 {Cladosporium herbarum, Mucor racemosm, and, more particularly, Fusarium 

 rubiginostim) discussed in this connection, being favored also by unseasonable 

 weather conditions and attacks of nematodes. 



Two Michig'an bean diseases, J. H. Muncie {Michigan 8ta. Spec. Bui. 68 

 {1914), pp. 12, pi. 1, figs. 2). — Popular descriptions are given of the bean 

 anthracnose due to Glotnerella {Colletotrichum) lindemuthiana and bean 

 blight caused by Bacterium phaseoli. The characteristics of these diseases are 

 contrasted, and suggestions are given for their control. 



For the anthracnose the selection of seed from pods showing no diseased 

 .spots is recommended, while for the bean blight disinfection of pods and selec- 

 tion will partially, though not completely, control the disease. In connection 

 with these diseases, particularly the blight, the growing of resistant varieties 

 is recommended. 



A bacterial rot of celery, W. Wobmald {Jour. Agr. Sci. [England], 6 {1914), 

 No. 2, pp. 203-219, pi. 1). — The author states that during the month of Febru- 

 ary, 1913, an examination was made of celery plants that were thought to be 

 damaged by the parasitic fungus Septoria petroselini apii. Some of the plants 

 were found to be in an advanced stage of decay, showing every evidence of a 

 soft brown rot. An examination of the tissues showed the presence of active 

 motile bacteria. These were isolated, and inoculation experiments showed that 

 the organism was capable of producing the disease in question. 



A technical description is given of the organism described as Bacillus apio- 

 vorus n. sp. It is said that little is known concerning the conditions inducing 

 and favoring the development of the disease or of remedies for its prevention, 

 but that proper sanitary i)recautions. the destruction of all decayed plants, 

 and the holding in check of biting insects, slugs, and snails would probably 

 aid in controlling the disease. 



A brief bibliography is appended. 



A fungus disease of peppers (Capsicum spp.), C. K. Bancroff and R. L. 

 HuNTE {Jotir. Bd. Agr. Brit. Guiana, 7 {1914), No. 3, pp. 139, i.^0).— The 

 authors report considerable injury to peppers grown in experimental tracts at 

 the botanic gardens during 1913. The pods were affected and in a number of 

 instances the ci'op was practically worthless. A study of the cause of the 

 trouble showed that it was due to the fungus CoJlctotriclium mgrum. Some 

 varieties, such as the Long White and Long Red. appeared very susceptible 

 to the disease, while others were less subject to attack. Red Chili and Long 

 Bird were imaffected. 



