744 EXPERIMENT STATION EECORD. 



wheat affected by the powdery mildew, but were unable to iufec-t them with 

 the fungus. ' 



The black blight of wheat aud oats {CJaOospoHum herbarum) api'.eared as a 

 general Infection of the fields of the station during 1908. This fungus occurs 

 ou many host plants, and the best means for prevention is to keep the fields and 

 neighboring grounds free from weeds upon which it is likely to grow. 



In connection with the notes given on the bean anthracnose (Colletotrichum 

 Undemuthianum) and the bean rust (JJi'omyces appendiculatus), suggestions 

 are presented for their control. 



Report of the department of botany, C. Brooks (Neic Hampshire Sta. Rpts. 

 1907-8, pp. 330-389, pis. 15, figs, 5). — This report gives an account of investiga- 

 tions on the fruit spot of apples, apple leaf spot, pine blight, notes ou apple aud 

 peach diseases, and comparative tests of fungicides. 



The report on the fruit spot of apples is a more extended form of a previous 

 account (E. S. R., 20, p. 847). 



The report on the leaf spot is by the assistant, I. M. Lewis, and treats of the 

 leaf six)t of apples, which in the opinion of the author is primarily caused by 

 the fungus Sph(croj)sis maJoriim. Experiments with Bordeaux mixture and 

 lime-sulphur mixtures for the control of this disease were carried on, and the 

 sprayed trees retained their leaves long after the unsprayed ones were com- 

 pletely defoliated. The best results were obtained with a 3-3-50 Bordeaux 

 mixture or a lime-sulphur 2-1-50 mixtui'e. 



Some investigations were conducted on a pine blight which seems to have 

 occurred chiefly on the white pine. In this the needles were browned in fairly 

 uniform manner over the entire tree or in some cases the tips of the needles 

 were browned while the bases remained green. No evidence of insect or fungus 

 troubles could be found, and it is thought probable that the trouble is of 

 physiological origin, resulting from drought or unfavorable locations. 



Descriptions are given of the apple scab, sooty blotch, apple rust, European 

 apple tree canker, winter injury due to extreme cold, spray injury due to 

 Bordeaux mixture, and peach yellows and peach leaf curl. These different 

 diseases are described aud remedies suggested where definite means are known. 



Comparative tests are reported of a number of fungicides in which the 

 jMcIntosh apple, a variety especially subject to scab, was sprayed with a number 

 of proprietary forms of Bordeaux mixture, with homemade Bordeaux mixture, 

 with copper phosphate, aud with proprietary and homemade lime and sulphur 

 mixtures, the object being to determine their relative value as fungicides and 

 also the injury due to spraying. The Bordeaux mixtures proved the most 

 efficient fungicides, with the proprietary lime-sulphur mixtures a close second. 

 When the possible injury to apples due to Bordeaux mixture is considered, the 

 lime-sulphur solutions seemed to offer an efficient method of controlling scab. 



The report concludes with a brief account of spraying experiments noted on 

 page 759. 



Annual report of the consulting botanist for 1908, W. Carruthers (Jour. 

 Roy. Agr: 8oc. England, 69 (1908), i)p. 308-320, figs. 6).— An account is given of 

 the work carried on under the supervision of the author, which includes seed 

 investigations and studies of weeds and of diseases and injuries to plants. 

 Among the latter subjects reports are given on the failure of the swede crop 

 due to attacks of Phoma napo-brassicce, the appearance of a Fusarium disease 

 of potatoes, Botrytis cincrea on sea kale, and smoke injury to oats. 



Report of the section for plant protection, C. Brick (Jalirl). Hamburg. Wiss. 

 Anst., 25 (1907), pp. 362-382). — A report is given of the work carried on in the 

 section for plant protection from July 1, 1907, to June 80, 1908, the work includ- 



