No. 3, July, 1921] PATHOLOGY 305 



PATHOLOGY 



G. H. Coons, Editor 

 C. W. Bennett, Assistant Editor 



(See also in this issue Entries 1606, 1614, 1618, 1842, 1930, 1937, 1959, 1968, 1974, 1997, 

 1998, 2061, 2063, 2065, 2067, 2069, 2071, 2072, 2188, 2195, 2202, 2227) 



PLANT DISEASE SURVEY; REPORTS OF DISEASE OCCURRENCE AND SEVERITY 



2094. Anonymous. The mosaic disease of the sugar cane in Trinidad. [Rev. of: 

 Williams, C. B. The mosaic disease of the sugar cane in Trinidad. Bull. Dept. Agric. 

 Trinidad and Tobago 19, part 1. 1920.] Internat. Sugar Jour. 23: 74-75. 1921. 



2095. KiRBY, R. S., AND H. E. Thomas. The take-all disease of wheat in New York 

 State. Science 52: 308. 1920. — Early in July 1920 attention was attracted to a small spot in 

 a field of soft, red, winter wheat at East Rochester, New York. The plants were badly dwarfed 

 and prematurely dead. In many cases secondary culms had been killed. Laboratory 

 examination showed that the roots of the plants were rotted, and that the lower internodes 

 were dark or entirely blackened and enveloped by a dense sheath-like plate of brown myce- 

 lium. Perithecia were found embedded in the leaf sheath and mycelial plate. Microscopic 

 measurements of perithecia and ascospores agree very closely with those given by Saccardo 

 for Ophiobolus graminis. Steps were taken to determine the source of infection and to com- 

 pletely eradicate the disease. No other evidence of take-all disease was found on this 

 farm or on those in the vicinity. The crop from an area 40 feet in diameter was spread over 

 the ground, gasoline was poured over the infected spot and vicinity, and the whole was then 

 burned over. — A. II. Chivers. 



2096. Lee, H, Atherton, and Marino G. Medalla. La enfermedad banda amarillo en 

 Filipinas. The yellow stripe disease in the Philippines.] Sugar 23: 53-54. 1921. — Mosaic 

 or yellow stripe disease of sugar cane as it occurs in various sugar countries is described with 

 a brief mention of different control measures. — C. W. Edgerton. 



2097. McCuBBiN, W. A. The potato wart situation. Potato Mag. 3': 5, 26-28. 2f!g. 

 1921. — The wart disease of potato {Solanum tuberosum) has been found in U. S. A. in 3 states,. 

 58 towns and villages, and about 800 gardens covering less than 100 acres. Quarantine meas- 

 ures are in force, but need to be re-enforced by more complete surveys and by more feasible 

 eradication methods than now exist. Immune varieties are being studied. — Donald Folsom^ 



2098. Montemartini, L. Alcune malattie nuove o rare osservate nel Laboratorio di Patolcgia 

 Vegetale di Milano 22-26. [Some new or rare diseases observed in the Laboratory of Vege- 

 table Pathology of Milan Nos. 22-26.] Rev. Patol. Veg. 10: 119-125. 1920.— A Macrosporium 

 was found on the leaves of Robinia pseudacacia that were drying up, beginning at the margins 

 and running in between the principal veins. Observations were made on the attack of the fun- 

 gus Clasterosporium amygdaleartan on an apricot tree that had remained immune though 

 surrounded by severely affected cherries. However, it also was attacked when severely 

 pruned. The pomegranate is described as a new host of H adrotrichum populi. Phyllosticia 

 macrocarpae is described as a new species causing a leaf spot that runs in between the lobe.9 

 of the leaves of Querciis macrocarpa. A new form of a rust is described, based on the longer 

 peridia of the aecia, namely, Gymnosporangium clavariaeforme (Jacq.) Rees f. longissima 

 Montem., on Crataegus oxyacantha. — F. M. Blodgett. 



2099. Simmonds, H. W., and C. H. Knowles. A disease of Clidemia hirta in the lower 

 Rewa District. Dept. Agric. Fiji Circ. 1. 9-12. 1920. — Adiseasewasfound to be destroying 

 the plants of Clidemia hirta, which is a bad weed in this region. The external appearance of 

 the diseased and dead plants is described. Efforts were made to determine the causal organ- 



