48 EXPERIMENT STATION RECORD. 



fungus is described at some length. By inoculation experiments it was found possi- 

 ble to transfer the organism from one variety of beans or cowpeas to another. 



No work is being carried on for the control of these diseases by spraying, but 

 the author believes that Bordeaux mixture properly applied would give beneficial 

 results. An additional suggestion is offered that all diseased vines be collected and 

 burned at the end of the season, so as to remove danger of infection as much as 

 possible. 



Asparagus rust in California, R. E. Smith (California Sta. Bui. 165, pp. 1-7, 

 18-99, figs. 33).— This bulletin gives the results of continued investigations on the 

 asparagus rust (E. S. R. ? 16, pp. 66, 986). 



The previous results have shown that by careful attention to cultural methods and 

 the relation of moisture to the development of the fungus the disease could be con- 

 trolled to a considerable extent. Continued studies have shown that the rust can be 

 almost completely controlled in California through careful attention to cultural 

 methods and the use of treatments which are described at considerable length. 



Tn 1904 an extended series of experiments was inaugurated to test the efficiency 

 of sulphur, both as a liquid spray and as dry powder, for the control of the fungus 

 causing the rust. These experiments are described at length. Summarizing the results 

 the author states that sulphur either in dry or liquid form, acting largely by its gas- 

 eous fumes, is a satisfactory rust preventive when properly applied. It is shown 

 that this treatment can be applied economically and practically in any of the dis- 

 tricts covered by the investigations. 



The use of contact sprays failed to give good results, but of those used resin Bor- 

 deaux was best and soap Bordeaux nearly as good. In general no spraying method 

 should be resorted to until rust control by cultural means has been carried as far as 

 possible, and it is probable that without reasonable attention to cultural methods 

 the best of spraying will prove a failure. 



The methods for the application of dry sulphur, time of treatment, amount of sul- 

 phur required, and the relative efficiency of different kinds of sulphur are discussed 

 at some length, the cost of material and application being estimated at from $5 to $6 

 per acre for 2 applications during the season. Where the sulphur spray is used 

 it is said to have some advantages and be more efficient, a single application being 

 considered the most effective single treatment for the rust. 



Brief notes are given on the rust parasites and on some of the insects affecting the 

 asparagus plant. 



Black rot of cabbage, W. Brenner ( ( 'entbl. Bakt. [etc.], 2. Abt., 12 {1904), No. 22- 

 .:',, pp. 725-735, figs. 6). — The anthor has investigated the black rot of cabbage and 

 allied plants, and in the main agrees with Smith and Harding regarding the occur- 

 rence in Europe of this disease, its cause, and methods of infection (E. S. R., 9, p. 

 847; 12, p. 654). 



The organism Pseudomonas campestris was isolated and studied in various media. 

 Inoculation experiments produced the characteristic appearance of the disease in 

 from 14 to 21 days. The relation of insects to infection was studied, and the author 

 concludes that infection can take place only through wounds or through the water 

 pores along the margins of the leaves. 



A bacterial disease of cauliflower and allied plants, F. C. Harrison ( Cenibl. 

 Bakt. {etc.'], 2. Abt., 13 {1904), Nos. 1-3, pp, 46-51; 5-7, pp. 185-198, ph. 6).— This is 

 practically a reprint of Ontario Agricultural College and Experimental Farm Bulletin 

 137 (E. S. R., 16, p. 480). 



Notes on a disease of cucumbers, P. Maze and H. T. Giissow (Jour. Roy. Agr. 

 Soc. England, 65 (1904), pp. 270-272).— A description is given of an apparently un- 

 desenbed disease of young cucumbers, which covered the fruit with a thick dark 

 olive-green mass of hyphae. In the specimens observed by the authors the portion 



