746 EXPEEIMENT STATION EECOED. 



work cjirried on with these fungi and material obtained from scabbed wheat, 

 oats, barley, rj^e, aud emmer hidicate the identity of the two species. 



In addition to the cereals the Fusarium is shown to be an active parasite 

 upon red clover, and there seems to be evidence of its parasitism upon alfalfa, 

 resulting in possible sickness of fields seeded after wheat. 



Some studies on Colletotriclium gossypii, R, J. H. DeLoach {Georgia 

 8ta. Bui. S.J, 1)1). 3-15, figs. S). — An account is given of investigations carried 

 on by the author on the cotton anthracnose (('. gassy pii) while connected with 

 the station. The studies included the life history of the fungus and also some 

 investigations carried on in the fields and in cotton mills. 



As a result of his investigations the author found present in the young cot- 

 ton bolls a mycelium aud also a brown mycelium in the seed coats. This 

 mycelium readily grew in cultures, the only difference apparently in the growth 

 of the brown mycelium and that taken from other sources being a difference of 

 time. The brown mycelium seems to be stouter and less sensitive to stimulants. 



The author is of the opinion that the control of the disease will depend to a 

 considerable extent on the diseased cotton left in the field, as the mycelium 

 seems to persist throughout the winter. Investigations in the field in 1908 seem 

 to indicate that the disease is carried over either through the brown mycelium 

 in the planted seeds cfr in the decayed and diseased bolls left over in the field 

 from the previous year. 



An attempt was made to determine the effect of selecting seed, and where one 

 lot of seed was planted as it came from the gin and another as selected there 

 was an apparent gain of about 12 per cent in sound plants due to the selection. 

 Marked differences in susceptibility of varieties to the anthracnose are shown, 

 the relative percentage of diseased bolls in 1907 and 1908 being given for 25 

 varieties. 



The relation of the anthracnose to the milling problems was taken up, and it 

 appears that much of the loss incurred in the mills is due to immature or dis- 

 eased fiber caused by the presence of the fungus. 



As practical suggestions for the control of this disease the author recom- 

 mends the burning of old plants, the rejection of diseased bolls when picking, 

 the gathering of cotton as early as possible, the rotation of crops, and the 

 cleaning of cotton seed, whereby the light seed is rejected, after which the heavy 

 seed is treated with a 3 per cent formalin solution. In addition to these sug- 

 gestions the use of resistant varieties is recommended as far as they can be 

 secured. 



A new disease of potatoes, Ducloux and L. Hediard (Betterave, 19 {1909), 

 No. Jj87, pp. 299, 300). — In a communication to the Society of Agriculture of 

 Nord, France, the authors describe a disease of potatoes to which the name 

 curliness is given. 



This disease is said to be of a physiological nature and rather poorly defined. 

 A number of causes have been attributed as favoring its development, among 

 them the degeneration of the varieties, soil conditions, aud the kind of fertilizers 

 used. The authors appear to think that degeneration of the varieties is the 

 most important of these, and call attention to the facts that the diseased poto- 

 toes often show weak, discolored, elongated sprouts, and that in some cases the 

 tubers fail to germinate entirely. In combating the disease it is recommended 

 that tubers from all such plants be rejected and only those tubers planted 

 which have been obtained from regions where the disease is not known aud 

 which are sound and show strong, well-developed, and well-colored sprouts. 



The prevalence of potato blight in Ireland in 1909 {Dcpt. Agr. and Tech. 

 Instr. Ireland Jour., 9 {1909), No. 4, pp. 745-74S). — An account is given of the 



