48 EXPERIMENT STATION RECORD. [Vol.43 



Scotland is ascribed to iiisuflicient available lime in the soil, the presence of 

 cruciferous weeds in the held, or the carrying of infection by grazing animals. 



Investigation during recent years 'has shown that lime dressings may have 

 some advantage. :\Iangels sliould replace turnips where this is possible. Work- 

 ing the land in dry condition i-educes infection. Resistant strains are preferable. 



The brown rot diseases of fruit trees, with special reference to two 

 biologic forms of Monilia cinerea, I, H. Wormald {Ann. Bot. [London], 33 

 (1919), No. 131, pp. 361-^04, pis. 2). — The results of work here described are 

 said to show that fruit trees in England are parasitized by AI. fructiffena and 

 M. cinerea, each of these two species having two forms distinguished by the 

 effects pi-oduced on mature apples inoculated under laboratory conditions. Of 

 the two biological forms of M. cinerea one produces a blossom wilt and e-anker 

 disease of apple, the other being limited to tlie single blossom originally in- 

 oculated. 



A general discussion of the results recorded in the present article is reserved 

 for correlaticjn with certain physiological and cultural experiments. 



The field treatment of Panama disease, P. W. INIuuray {Ann. Rpt. Bd. 

 Affr. and Deut. I'ub. Gard. and I'lantatlons Jamaica, 1918, pp. 16, 17). — It is 

 stated as a result of six years of practical experience that the method employed 

 under difficult conditions against the Panama disease is so successful that no 

 modiheation is yet required or practicable. 



\\'hen the Panama disease was recognized as a root disease, spreading by 

 direct contact between roots, it was decided that all bananas within extreme 

 root range of a diseased tree should be destroyed and the whole area fenced and 

 quarantined as infected. This procedure invariably insures success, whereas 

 neglect or relaxation of this rule leads to a recurrence of the disease. 



[Panama disease of banana], H. H. Cousins {Ann. Rpt. Bd. Ayr. and Dcpt. 

 Pub. Gard. and Plantations Jamaica, 1919, p. 7). — Statistics of infection by 

 Panama disease are given, running back as far as the appearance of this disease 

 in 1911. The most recent reports are not so favorable as are those of the 

 jirevious year above noted. Drastic steps have been taken. Experience has 

 shown that early recognition of this disease is a most important factor in its 

 control. 



Inspection of i)lant diseases, H. G. Coote {Ann. Rpt. Bd. Agr. and Dept. 

 Pub. Gard. and Plantations Jamaica, 1919, pp. 19, 20). — In a report on coconut 

 sanitation and replacement in eastern St. Thomas and Portland, it is stated that 

 80,000 trees were without discrimination cut down and burned as a result of the 

 ravages of the hurricane occurring some months previously or of attack by the 

 bud-rot fungus. 



Wet weather immediately following this work, and the consequent accumula- 

 tion of moisture and softening of the cell walls, led to a rapid recurrence of the 

 disease. INIany of the trees damaged by the hurricane were attacked in the 

 renewing portions by the Phytophthora form of leaf bitten disease and finally 

 gave way before the bud rot. 



More on root rot, G. Leone {Agr. Colon. [Italy], 13 {1919), No. 9, pp. 354^- 

 355). — Further study of the root trouble of orange previously noted (E. S. R., 

 40, p. 851), has shown the presence in this connection of a nematode, which has 

 not yet been identified. 



Pecan rosette in relation to soil deficiencies, S. M. MoMurran {Ainer. 

 Nut Jour., 10 {1919), No. 3, pp. 38, 39, ^3).— This is substantially the same as 

 the information previously noted (E. S. R., 40, p. .544). 



Preventing wood rot in pecan trees, S. M. McMueran {Anier. Nut Jour., 

 10 {1919), No. 3, pp. 40, 41). — This information has been noted previously 

 (E. S. R., 40, p. 158). 



