Janvakv, L920] PATHOLOGY L5 



10 1. Fischer, C. E. C. Cause of the spike disease of sandal (Santalum album I. Indian 

 Forester 44: f>70-575. l'.Hs. ( >l>servations on the disease which support Coleman' idea of 

 the infer! ions nature of the disease as opposed to 1 he autogenel ic I heory proposed by Hole. — 

 It is suggested that the disease was introduced by American missionaries 00 Ltmtana camara 

 a plant which si i tiers from a spike disease, that the in feet ions agent may be nil ra-microscopic 

 and thai it may be carried by Bucking insects. [See Bot. Absts. 2, Entries 1177, L296, I !97 

 1298, 1303, 1304; 3, Entry 121.]—/;. Roddick. 



105. Gabbowski, L. Les champignons parasites recueillie dans le gouvernement de 

 Podolie (Russie) pendant l'ete 1915. [Parasitic fungi collected in Podolia in 1915.] Bull. Soc. 

 Mycol. France 33: 73-91. 1918.— Abst. in Bot. Centralbl. 138: 280. 1918. 



106. Gasman, II., and Carrie Lee Hathaway. Treatment of seed wheat with formalin. 

 Kentucky Agric. Exp. Sta. Circ. 22: 23-27. 1918. — Experimental evidence to show that the 

 viability of wheat seed may be reduced by treating with formaldehyde solution at the 

 strength employed, 1 pint of formaldehyde to 30 gallons of water. — D. Reddick. 



107. Hayes, H. K., and E. C. Stakman. Rust resistance in timothy. Jour. Amer. Soc. 

 Agron. 11: 67-70. 1919. — Eleven Cornell and 6 Minnesota varieties of timothy were sprayed 

 with rust spores and data taken on the amount of infection. The Minnesota selections were 

 very susceptible to the rust while the Cornell selections showed a high percentage of resistant 

 plants. The results indicate that the production of a rust-resistant timothy could be easily 

 accomplished. — J . J. Skinner. 



108. Humphrey, Harry B. Cereal diseases and the national food supply. U. S. Dept. 

 Agric. Yearbook 1917:481-495. PI. 70-78, 8 fig. 1918.— The importance of cereal diseases, 

 chie'iy smuts and rusts, but also scab, bacterial diseases, etc., is discussed. In 1916, the spring 

 wheat growers paid the largest cereal-disease toll ever paid in the United States. Eleven 

 smut diseases and twelve rust diseases are compared as to relative damage produced. A dis- 

 cussion of seed treatment for smuts on a national scale is presented. For the control of rusts 

 definite progress is indicated in breeding and selecting for rust-resistance. Many difficulties, 

 however, stand in the way. Crossing rust-resistant durums and emmers with common wheats 

 has thus far failed to yield a hybrid which is entirely satisfactory. The author is enthusias- 

 tic over hybrids obtained by crossing Kubanka and Haynes, and Kubanka and Preston. 

 Among the hard red winter wheats three (Kanred, P 1066 and P 1068) are remarkably rust- 

 resistant, the Kanred, especially meeting the requirements in yield, milling and baking. — 

 L. R. Hester. 



109. Jensen, C. O. Undersigelser vedrorende nogle svulstlignende Dannelser hos planter. 

 [Investigations upon certain tumor-like formations in plants.] Kgl. Vetr. Lbhsk. Aarsskrift 

 1918: 90-143. PI. 1, fig. 1-17. Kjobenhavn, 1918.— A summary in English is appended. — The 

 tumors formed on the leaves of Ectreveria carundulata have been investigated; inoculation and 

 transplantation have given no positive information on the biological quality of the tissue. 

 Transplantation of the nodules formed on the roots of the hybrids between Brassica campes- 

 tris and Brassica napus have resulted in no abnormal growth. These nodosities cannot be 

 considered analogous to the malign animal tumors.— The aspect, size and effect on the plants 

 of the tumors occurring on the roots of Beta vulgaris vary with the different cultivated forms; 

 the tumors are caused by Bacterium tumefaciens, but in older tumors the bacteria die off. 

 Nevertheless, tissue from spontaneous tumors can be transplanted easily to normal root-, and 

 produce fresh tumors, originating solely from the transplanted tissue, and with the structure 

 and appearance determined by the original plant, which is shown in a striking way, when 

 transplantation is effected with varieties of different color — Transplantation was successful 

 through four generations; the pathogene was never isolated from these secondary tumors, 

 and it, therefore, seems that the abnormal proliferative power, due to the pathogene, re- 

 mains with the cells for some cell-generations independent of the continued stimulus. — By 

 inoculation from pure cultures, tumors have resulted, varying on the different varieties ex- 



