f 



148 



MISSOURI BOTANICAL GARDEN. 





35. Sorauer, P. Intumescenzen an Bliiten. (Ber. d. deutsch.bot. Ges. 



19:115. 1900). 



36. Swingle, W. T. Bordeaux mixture. (Bull. No. 9, Div. Veg. 



Phys. & Path., U. S. Dept. Agr. 189G). 



37. Trotter, A. Intumescenze fogiiari di Ipomaea Batatas. (Annal'i cH 



Botanica. 1 : 302. 1904). 



38. Viala, P. 3 and Pacottet, P. Sur. les vermes des feuilles de la vigne. 



(Comp. Rend, de s. d. T Acad. d. Sci. 138 : 103. 1904). 

 3d. Woods A. F. Stigmouose, a disease of carnations and other pinks. 



(Bull. No. 19, Div. Veg. Phys. & Path., U. S. Dept. of Agr. 



1900). 

 40. Woods, C. D., and Bartlett, J. M. Experiments with potatoes. 



(Bull. Maine Agr. Exp. Station, No. 57, page 145. 1899). 



DESCRIPTION OF PLATES. 



Plate 25. — Photograph showing the under surface of cauliflower leaf 

 sprayed with copper ammonium carbonate. Appearance five days after 



spraying. 



Plate 20. — Photograph showing a small portion of cauliflower leaf 



sprayed with copper ammonium carbonate, five days after spraying. 

 Approximately natural size. 



Plate 27. — Sections of cauliflower leaf. 1, Section through a healthy 

 leaf, showing the shape of the cells. The cell contents have been 

 omitted for the sake of clearness. 2, Section of leaf through a growing 

 intumescence, showing the enlarged spongy parenchyma cells. 



Plate 28. — Section through a fully formed intumescence on cauli- 

 flower leaf, five days after spraying with copper ammonium carbonate. 



Plate 29. — 1, Cauliflower leaf sprayed with copper nitrate, showing 

 the dead areas, wherever the spray struck the leaf. 2, Cauliflower leaf 

 sprayed with 10 per cent, ammonia, showing the killed areas of the leaf. 



Plate 30. — 1, Cauliflower leaf sprayed with copper sulphate, showing 

 the dead area wherever spray struck the leaf. 2, Cauliflower leaf 

 sprayed with copper chloride, showing dead area where the spray struck 



the leaf. 



Plate 31. — Cauliflower leaf sprayed with copper ammonium carbon- 

 ate^ showing how the leaf was killed where the spray struck in large 

 quantities, with intumescences where small drops struck. 



