of seed beds, thorough cultivation, irrigation and drainage, and the 

 destruction of weeds. 



After each crop all old plants and debris should be burned and 

 a proper rotation maintained. Spraying with the various fungicides 

 will be found of value for many of the diseases. 



LITERATURE CITED. 



(1) Barrett, 0. W.— 1903. Report of the Entomologist and Path- 



ologist. Ill Annual Report of the P. R. Agric. Exp. Sta. 

 for 1903, pp. 449-450. 



(2) Barrett. 0. W.— 1904. Report of the Entomologist and Path- 



ologist. //( Annual Report of the R R. Agric. Exp. Sta. 

 for 1904. pp. 397-399. 



(3) Barrett, 0. W.— 1905. Report of the Entomologist and Path- 



ologist. In Annual Report of the P. R. Agric. Exp. Sta. 

 for 1905. pp. 22-23. 



(4) Barrett, 0. W.— 1905. Disca.ses of Yautia. hi BuL 5 of the 



Porto Rico Agric. Exp. Sta.. pp. 22-23. 



(5) Henricksen, H. C. — 1906. Vegetable Growing in Porto Rico. 



Porto Rico Agric. Exp. Sta. Bui. 6, pp. 9-58. 



(6) Jamiesox. Clara 0. — 1915. Phoma Destructiva the Cause of 



a Fruit Rot of the Tomato. In Jour. Agr. Research, vol. 4, 

 No. 1, pp. 1-20. 



(7) Young, Esther. — 1915. Studies in Porto Rican Parasitic 



Fungi-I. In Mycologia, vol. 7, No. 3, pp. 143-150. 



(8) Arthur, J. C. — 1915. Uredinales of Porto Rico. /» Mycologia, 



vol. 7, No. 4, pp. 168-196. 



(9) Garman. Phu.ip. — 1915. Some Porto Rican Parasitic Fungi. 



//) Mycologia. vol. 7, No. 6, pp. 333-340. 



(10) Stevenson, J. A. — 1915. Report of the Pathologist. //( Fourth 



Report of the Board of Commissioners of Agriculture of 

 Porto Rico. pp. 33-34. 



(11) Young. P]sther. — 1915. Studies in Porto Rican Parasitic 



Fungi-IT. In Mycologia, vol. 8. No. 1, pp. 42-46. 



117 



