June z6,1933 
Watery-Rot of Tomato Fruits 
905 
ered by the cuticle, such as wounds, cracks, and punctures. It shows a 
little preference for ripe fruits, but infects green fruits quite readily. It 
invades the cells, destroys their protoplasmic contents, and causes loss 
of cell coherence through a slow dissolution of the middle lamellae of the 
cell walls. 
(4) The minimum temperature for the germination of its spores, 
growth of its mycelium, and its infection of tomato fruits is approxi¬ 
mately 2° C., the optimum 30"^, and the maximum between 37.5° and 
Immersing the fungus spores (cells) in an aqueous solution of an anti¬ 
septic for 30 minutes and transferring them to sterile carrot decoction 
had the following effects on their viability: Chlorid of lime i: 40, potas¬ 
sium permanganate i; 400, formaldehyde (37 per cent) 1:300, and mer¬ 
curic chlorid i: 5,000, no growth; potash alum or copper sulphate in 
saturated solution, considerable growth. The percentage of tomato 
fruits infected after inoculation with this fungus was considerably re¬ 
duced by washing them for 30 minutes in an aqueous solution of chlorid 
of lime 1:40 or formaldehyde (37 per cent) i: 240. It would seem from 
these results that an effective wash could be developed for the control of 
a large number of these rots during shipment. 
LITERATURE CITED 
(1) Blackman, V. H., and Wklsford, E. J. 
1916. studies in the physiology of parasitism. II. INFECTION BY BOTRYTlS 
ciNEREA. In Ann. Bot., v. 30, p. 389-398, 2 fig., pi. 10. Literature 
cited, p. 397. 
( 2 ) Boyle, C. 
1921. STUDIES IN THE PHYSIOLOGY OF PARASITISM. VI. INFECTION BY SCLERO- 
TiNiA libERTIana. In Ann. Bot., v. 35, p. 337 “ 347 » pl- Literature 
cited, p. 346-347- 
(3) Brown, William. 
1915. STUDIES IN THE PHYSIOLOGY OF PARASITISM. I. THE ACTION OF BOTRYTlS 
CINEREA. In Ann. Bot., v. 29, 313-348. References, p. 348. 
(4) 
( 5 ) 
1916. STUDIES IN THE PHYSIOLOGY OF PARASITISM. III. ON THE RELATION 
between the “infection drop" and the underlying host tissue. 
In Ann. Bot., v. 30, p. 399-406. 
1917. ON the physiology of parasitism. In New Phytol., v. 16, p. 109-127. 
References, p. 127. 
(6) HassELBRING, Heinrich. 
1906. THE APPRESSORIA OF THE ANTHRACNOSES. In Bot. Gaz., V. 42, p. 135-142, 
7 fig- 
(7) Hawkins, Lon A., and Harvey, Rodney B. 
1919. physiological study of the parasitism of pythium debaryanum 
HESSE ON THE POTATO tubEr. In JouT. AgT. Research, v. 18, p. 
275-298, 2 fig., pl. 35-37. Literature cited, p. 295-297. 
(8) ScHNELL, Erwin. 
1912. DIE AUF PRODUKTEN DER LANDWIRTSCHAFT UND DER LANDWIRTSCAHFT- 
LICHEN GEWERBE VORKOMMENDEN OOSPORA (OIDIUM) LACTIS—VARIE- 
TATEN. In Centbl. Bakt. [etc.], Abt. 2, Bd. 35, p. 1-76, 6 pl. 
(9) Smith, Erwin F. 
1920. AN INTRODUCTION TO BACTERIAL DISEASES OF PLANTS. XXX, 688 p., 453 
fig- [pl-] Philadelphia, London. Literature at end of most of the 
chapters. 
(10) Ward, H. Marshall. 
IQ02. ON THE question OF “PREDISPOSITION" AND “IMMUNITY IN PLANTS. 
In Proc. Cambridge Phil. Soc., v. ii, p. 307-328. Bibliographical 
footnotes. 
^ ^ 1905. RECENT RESEARCHES ON THE PARASITISM OF FUNGI. In Ann. Bot., V. I9, 
p. 1-54. Literature cited, p. 50-54. 
