52 EXPERIMENT STATION RECORD. [Vol.36 



Aq experiment in controlling fungus diseases by putting copper sulphate in 

 the flowage water was carried out, but the results show no advantage in favor 

 of the treatment. In storage, however, the berries from the treated sections 

 showed smaller percentages of rot than those from other sections. 



An investigation of cranberry bogs in New Jersey, where treatment was being 

 made for control of plant diseases, did not reveal any such injury as that 

 caused by spraying tests in Massachusetts. No definite reason for this differ- 

 ence is evident, although it is thought that it may possibly be connected in some 

 way with the iise of sand as a mulch in Massachuotts. 



The disease Ijnown as Wisconsin false blossom is reported on several va- 

 rieties, and evidence seems to be accumulating that in some way the disease 

 is infectious. 



A new disease called blossom end rot in previous reports was more prevalent 

 than usual. The investigation of the fungus causing this disease is being 

 continued. 



Eradication on a large scale, E!. Nelson {Abs. in Phytopathology. 6 (1916), 

 No. 1, p. Jl-'f). — A description is given of the attempt being made in Florida to 

 eradicate the citrus canker due to Pscudomonns citri. The method employed 

 is to destroy with fire the infected trees, these being sprayed with kerosene 

 mixed with crude oil. 



Diseases of plants caused by nematodes, G. P. Clinton (Connecticut State 

 Sla. Rpt. 1915, pt. 6, pp. 452-462. pis. 2). — After a brief account of the occur- 

 rence and injurious action of Heterodera radicicola, the author describes a 

 leaf blight nematode (Aphclenchus olcsistvs) as attacking begonias and ferns 

 in greenhouses. 



Cutting out chestnut blighted timber, E. M. Stoddakd and A. E. Moss (Con- 

 necticut State Sta. Rpt. 1915, pt. 6, pp. 488-496, pis. 2, fig. i).— In order to de- 

 termine whether the spread of chestnut blight could be retarded or checked by 

 the removal each year of infected trees, and if so, whether the work is eco- 

 nomically possible, the authors carried on experiments on 130 acres, on which 

 every winter all infected chestnut trees were removed, and for comparison the 

 infected trees on an adjoining 190 acres wore counted but not removed. 



As a re.sult of tills investigation, it was found that in Connecticut the cutting 

 and removing from woodlots of trees infected with chestnut blight did not 

 prevent the spread of the disease. The cost of inspection, cutting, and remov- 

 ing is considered too high to warrant its adoption from a commercial standpoint. 



A Gloeosporium on horse-chestnut shoots, J. F. Adams (Abs. in Phytopathol- 

 ogy, 6 (1916), No. 1, pp. 114, 115). — A blighting of the terminal shoots of the 

 horse-chestnut, due to a species of Gloeosporium. is described. Inoculation 

 experiments with this fungus on apple have produced conditions similar to those 

 produced by Glomcrclla cingulata. 



Leaf fall of conifers, F. W. Neger and J. Fuchs (Jahrb. Wiss. Bot. [Prings- 

 heim], 55 (1915), No. 4, PP- 608-660, figs. 22).— The authors have studied leaf 

 separation and frost killing in certain conifers. 



Leaf cast is most commonly due directly to water loss. The forms or 

 processes of separation peculiar to different conifers are described. Frost 

 killing of evergreen foliage appears to be a special case of late frost injury 

 and to have its origin In the untimely awakening of the young needles in 

 spring. The reddening often noted is a post mortem effect having no causal 

 connection with the death of the foliage. It follows exposure to full sunlight 

 of killed needles which still have a high content of water and acid. 



Tipburn in white pine, G. P. Bubns (Abs. in Phytopathology, 6 (1916), No. 1. 

 p. 116). — A form of tipburn occurring in the forest nursery of the State For- 



