276 PATHOLOGY [Bot. Absts., Vol. V, 



2111. Wilcox, E. Mead. The nature and classification of plant diseases. Publ. Nebraska 

 Acad. Sci. 10: 5-14. 1920. — We may recognize four great bases for the classification of plant 

 diseases: taxonomy, etiology, morphology, physiology. The paper closes with a two page 

 classification of plant diseases, with examples, under the captions Ontopathology and Phyto- 

 pathology, relating respectively to functions having to do with the maintenance of life and 

 those concerned with the perpetuation of the species. — H. S. Conard. 



SUGAR CANE DISEASES 



2112. Ashby, S. F. Mottling or yellow-stripe disease of sugar cane. Jour. Jamaica Agric. 

 Soc. 23: 344-347. 1919. — A compiled account covering damage caused, distribution, symp- 

 toms, varieties attacked, and control measures of the mottling or yellow-stripe disease of sugar 

 cane, now prevalent in Porto Rico and the southern United States. The disease has not been 

 found to date in Jamaica. — John A. Stevenson. 



2113. Cross, W. E. The Kavangire cane. Louisiana Planter and Sugar Manufacturer 63: 

 397-399. 1 fig. 1919. — A discussion of the desirable and undesirable qualities of the Kavan- 

 gire cane, the variety that has been proved to be immune to the mosaic disease, is given. It 

 is a cane very susceptible to frost and drought injury and its small size also makes it expensive 

 to handle. — C. W. Edgerton. 



2114. Earle, F. S. The mosaic or new sugar cane disease. Louisiana Planter and Sugar 

 Manufacturer 63 : 167. 1919. — In a criticism of the article of R. M. Grey (Louisiana Planter 

 and Sugar Manuf. 63: 90. 1919), the behavior of the mosaic disease is stated as being often 

 contradictory yet in the main it is capable of causing an immense loss. A cane stalk once 

 affected with the disease never recovers. It is probable that Grey confused the mosaic with 



•;her sugar-cane troubles. — C. W. Edgerton. 



21 15. Edgerton, C. W. Mosaic or mottling disease of sugar cane. Louisiana State Univ. 

 Div. Agric. Ext. Circ. 32: 1-6. 1 fig. 1919. — A popular discussion of the mosaic disease of 

 sugar cane, including a description of the disease, varietal susceptibility, distribution and 

 methods ol control. — C. W. Edgerton. 



2116. Edgerton, C.W., andC. C. Moreland. Effect of fungi on the germination of sugar 

 cane. Louisiana Agric. Exp. Sta. Bull. 169. 40 p., 9 pi., 2 fig. 1920. — The average germina- 

 tion of the buds of sugar cane in Louisiana is around 20 per cent. Among the many factors 

 instrumental in causing this low germination is that of the action of several fungi. The 

 common or serious fungi found on deteriorating seed cane in Louisiana, include Colletotrichum 

 falcatum, Melanconium sacchari, Gnomonia iliau, Marasmius plicatus, Thiclaviopsis paradoxa 

 and species of Fusarium and Scopularia. Of these, C. falcatum seems to cause the most loss 

 in Louisiana. Stalks of seed cane inoculated with this fungus at planting time show an aver- 

 age deterioration of about 50 per cent. Stalks that have a heavy infection of the red rot 

 disease, caused by C. falcatum, before cutting, do not deteriorate so rapidly when used for 

 seed as stalks that are inoculated after cutting. The other fungi, with the possible exception 

 of a Fusarium, are of little economic importance in Louisiana as far as the germination of the 

 buds is concerned. Preliminary tests in "seed" treatment using corrosive sublimate and for- 

 maldehyde have given encouraging results. — C. W. Edgerton. 



2117. Edgerton, C.W., and others. The mosaic disease. Louisiana Planter and Sugar 

 Manufacturer 63: 253-255, 350. 1919. — A stenographic report of a discussion at a meeting 

 of the Louisiana Sugar Planters' Association on the mosaic disease of sugar cane. — C. W. 

 Edgerton. 



2118. Fawcett, G. L. The yellow-stripe or mosaic disease in the Argentine. Louisiana 

 Planter and Sugar Manufacturer 64: 41. 1920.— The mosaic disease has been in Argentina for 

 at least fifteen years. In all the sugar provinces except one, it is impossible to find a plant 



