58 EXPERIMENT STATION RECORD. 



soil so as to expose it to the sun. An examination of the rhizomes showed an 

 abundant fungus mycelium which from its spore formation resembles Allantospora 

 radlcicola. Further studies will be required to demonstrate the specific relations of 

 the fungus. As a precautionary measure, it is recommended that the rhizomes 

 should be washed and soaked for half an hour in Bordeaux mixture prior to planting. 



The asparagus rust, V. H.Davis {Agr. Student, 8 (1901), No. 3, pp. 57-60).— The 

 occurrence of the asparagus rust in the gardens connected with the Ohio State Uni- 

 versity is noted. The 1 -year-old plants l)egan to show the effects of the disease 

 about the middle of August, and ])y the first of September the old beds showed the 

 signs of a general attack of the fungus. Various suggestions are given for the pre- 

 vention (if the disease, quotations being made from experiment station publications. 



Cucumber leaf disease, M. C. Cooke (Juur. Roy. Hart. Sue. [Ijiiido)/], 26 {1901)^ 

 No. 2-3, J). CXLIV). — The author reports having received badly affected cucumber 

 leaves which contained a fungus which has been previously described by him as 

 occurring on melons under the name Cercospora melonis. 



The prevention of onion smut, A. D. Selbv {Ohio Sta. Bid. 131, pp. 47-51).— In 

 continuation of the experiments reported in Ohio Station Bulletin 122 (E. S. R., 13, 

 p. 257), cooperative experiments were conducted upon 3 tracts of smutted soil 

 devoted to onion growing. The effect of soil treatment of 2 strengths of formalin 

 solution and 2 different rates of lime was tested. The results obtained demonstrated 

 the value of dilute formalin solutions and of heavy applications of ground lime for 

 the prevention of onion smut in infected soils. The formalin should be used at the 

 rate of 1 lb. to 25 to 30 galls, of water, applied to the seed and then covered with 

 earth. If the lime treatment is adopted, 75 to 125 bu. per acre of ground quicklime 

 should be ai)plied just before seeding. 



A peculiar rotting of Greening apples in 1900, L. R. Jones and A. W. Epson 

 ( Vermont Sta. Bpf. 1901, pp. 235-237). — During the autumn of 1900 a peculiar rot of 

 Greenings was reported after the apples had been put in storage. The trouble was 

 common throughout a considerable jiortion of the orchards in the Champlain Valley. 

 The affected apples exhibited small, clearly defined, brown spots which gradually 

 increased in size. Wlien the spots attained a diameter of about half an inch, a 

 white fungus growth appeared in the center which gave to the apple a very peculiar 

 and marked appearance. This fungus proved to be the blue mold which is a connnon 

 ripe-rot fungus of apples. The mold is not believed to be able to attack the uninjured 

 fruit, and careful examinations showed the presence of the apple-scab fungus in the 

 center of the rotting spots. It is believed that the peculiarly moist weather of the 

 latter part of September led to the unusual development of small scab spots. This 

 condition of weather, following a very dry summer, was unfavora])le to the develop- 

 ment of the fruit, and the scab fungus prepared the way for the invasion by the 

 mold which was the immediate cause of the decay. The combination of conditions 

 which made it possible for the attack of this fungus was unusual and will probably 

 not occur again soon. If it could have been foreseen, the trouble might have been 

 prevented by a single application of fungicide late in the season. 



Peach-leaf curl and its treatment, G. Quinn {.Tour. Agr. and Ind. South Aus- 

 tralia, 5 (1901), No. 4, pp. 329, 330). — A report is given on experiments conducted 

 to combat the peach-leaf curl due to attacks of Exoascus deformans. During the pre- 

 vious season tlie disease is reported to have been very severe. At the lieginning of 

 the season reported upon the trees were thoroughly sprayed with Bordeaux mixture, 

 and as a result entire immunity seems to have l)een secured to those trees receiving 

 the application of the fungicide. Of the trees not sprayed a decided difference in 

 susceptibility to the fungus is reported. In all, 40 varieties of peaches are reported 

 ujifin, (\i which al)out half are classed as resistant. 



A Monilia-like disease of sour cherries, Aderhold {/AscJir. Pflanzcnkrank., 11 

 {1901), No. 2-3, pp. 65-73, pi. l).—k description is given of a disease of sour-cherry 



