204 PATHOLOGY [Bot. Absts., Vol. VIII, 



cans and resembling an anthracnose in its effect. Dark, elongated lesions may occur on any 

 part of the plant above ground. The disease is now known to occur in North Carolina, 

 South Carolina, Georgia, Mississippi, Louisiana, Tennessee, and at Ithaca, New York (the 

 type locality). Infection is carried in the seed, which may thus introduce the disease to new 

 fields.— W". C. Coker. 



ERADICATION AND CONTROL MEASURES 



14n. Anonymous. Porto Rico fights cane mottling disease. Sugar 22: 208-210. 1920. — 

 A review of recent publications from the Porto Rico Experiment Station on the mosaic disease 

 of sugar cane. — C. W. Edgerton. 



1412. BoTJES, J. OoRTWTN. Raising phloem-necrosis and mosaic free potatoes, and a 

 source of infection whose nature has not yet been elucidated. Phytopath. 10: 48^9. 1920. — 

 Tubers from selected healthy plants should be planted by the hill-row method with 3 or 4 

 meters between the rows. The intervening spaces should be planted with other crops. When 

 any plant shows disease all of the same progeny should be discarded. Fields and nursery 

 plots should be widely separated. — R. E. Vaughan. 



1413. Butler, O. On the amount of copper required for the control of Phytophthora in- 

 festans on potatoes. Phytopath. 10:298-304. 3 fig. 1920.— Spraying experiments with 

 Bordeaux near Durham, New Hampshire, in 1919, showed the amount of copper necessary 

 per acre per annum to control losses from P. infestans to be between 24 and 26 lbs. The 

 experiments demonstrated that 1:0.5 Bordeaux was superior to 1:1. — R. E. Vaughan. 



1414. Detwiler, S. B. Results of white pine blister-rust control in 1919. Phytopath. 10: 

 177-180. 1920. — A summary of the blister-rust control work done in the U. S. A., with de- 

 tailed statement of cost of Ribes eradication. — Frank T. McFarland. 



1415. Earle, F. S. Instrucciones para la eradicacion de la enfermedad del Mosaico de la 

 cana. [Instructions for the eradication of the mosaic disease of cane.] Sugar 21:51-52. 

 1919. — A brief discussion of the mosaic disease of sugar cane and its control by means of 

 selection and rogueing. — C. W. Edgerton. 



1416. Edgerton, C. W. A new method of selecting L 511 cane free of the mosaic disease 

 for planting purposes. Louisiana Planter and Sugar Manufacturer 65:252-253. 1920. — 

 Practically a reprint of Louisiana Agric. Exp. Sta. Bull. 176 [see following entry]. — C. W. 



Edgerton. 



1417. Edgerton, C. W. A method of selecting L 511 cane free of the mosaic disease for 

 planting purposes. Louisiana Agric. Exp. Sta. Bull. 176. 7p., Ifig. 1920.— The L 511 variety 

 of sugar cane is more resistant to the mosaic disease than the other common varieties. The 

 disease can be detected upon the stalks of this variety by the presence of red stripes. In 

 selecting healthy cane for seed, the stalks can be selected after being cut and stripped, thug 

 eliminating the difficult field inspection. A 1-year test of this method of selection proved 

 entirely satisfactory. — C. W. Edgerton. 



1418. Gilbert, Alfred H. Certified seed inspection in Vermont. Potato Mag. 3 : 6, 

 20-21, 26. 1921. 



1419. GouAUX, C. B. Mosaic disease of sugar cane in Louisiana. Louisiana Planter and 

 Sugar Manufacturer 65: 269. 1920. — Recommendations for rogueing out diseased plants in 

 sections where the disease is as yet very limited. — C. W. Edgerton. 



1420. Henning, Ernst, och Thore Lindfors. Krusbarsmjoldaggens Bekampande — 

 Studier och Forsok. [Gooseberry mildew control — investigations and experiments.] Central- 

 anst. Forsoksv. Jordbruksomr&det Medd. 208. 51 p. 1920. — The article describes briefly 



