No. 3, July, 1921] 



PATHOLOGY 



309 



man border. Experiments with resistant varieties are under waj'; so far, only the variety 

 Ceres has proved resistant. The legislative measures are strict and far reaching, and complete 

 eradication of the disease in Holland is being attempted. — D. Atanasoff. 



2118. QU.A.NJER, H. M. Considerations nouvelles sur les maladies de la pomme de terra. 

 [Recent work on the diseases of potato.] Bull. Soc. Path. \eg. France 7: 102-118. K-20. — 

 An address given under the auspices of the Phytopathological Society of France in Paris. 

 A resume of the recent work on the principal diseases of the potato is given with special atten- 

 tion to the mosaic disease and the results of the author's investigations which have already 

 been published elsewhere. — C. L. Shear. 



2119. Salisbury, E. J. [Rev. of: Butler, E. J. Fungi and disease in plants, vi + 

 S47 p., 5 pL, 205 fig. Thacker, Spink & Co.: Calcutta and Simla, 191S.] Sci. Prog. [London] 

 13: 677-678. 1919. 



ERADICATION AND CONTROL 



2120. Anonymous. Broeiproeven van tegen aaltjesziek behandelde Narcissenbollen. 

 [Heating experiments with nematodes in narcissus bulbs.] Weekbl. Bloembollencult. 30: 

 303, 312. 1920. — A number of narcissus bulbs were kept for 1, 2, and 3 hours in water at 

 110-111°F. to destroy nematodes. Treatment for 1 or 2 hours gave best results. Experiments 

 were carried on with the following varieties: King Alfred, Emperor, Golden Spur, and N. 

 Leedsi Lucifer. — J . C. Th. Uphof. 



2121. Anonymous. Control of the white pine blister rust. Bien. Rept. New Hampshire 

 State Forest. Commission 1919-1920: .39-52. 1920.— A systematic survey, begun with the 

 discovery of the disease in 1916 and continued through 1920, has proved that the white pine 

 blister rust is generally distributed in the pine regions of the state. As examples of the degree 

 of infection the following cases may be cited: On a narrow strip 70 miles long in the Ammo- 

 noosuc Valley, 24 per cent of the pines were diseased; in the same region, on a plot of 43 

 acres, 55 per cent of the pines were diseased; both cultivated and wild Ribes were found to be 

 generally infected in all areas scouted. There is only one known and proved method of check- 

 ing the rust, and that is the removal of all Ribes. The amount of eradication work and the 

 cost for 1917 compared with that of 1920, and the total work done, are shown in the table. 



A table giving the 1919 and 1920 costs for the individual towns is appended. The actual cost 

 to the state for eradication of approximately half a million acres was about S.05 per acre, 

 the rest of the funds being furnished through cooperative agreement by the Federal govern- 

 ment and the towns. Improved methods of advance surveys by men who mark areas requir- 

 ing the attention of crews have reduced the cost and made possible the covering of a much 

 larger acreage. The crews averaged better than 96 per cent eradicating efficiency. At the 

 present rate 7 or 8 years more will be required to eradicate Ribes spp., from the whole state; 

 and in view of the heavy potential loss to pine owners the work should be continued with all 

 the funds which can be made available. — Reginald H. Coiley. 



2122. Britton, W. E., and G. P. Clinton. Spray calendar. Connecticut [New Haven] 

 Agric. Exp. Sta. Bull. 224. 67-110. 1921.— This is the 5th revision of the spray calendar 

 issued by the station. It includes brief descriptions, with preventive measures, of insects 

 and fungi attacking 98 species of plants growing in the state. Methods are given for the prep- 



