noted that those supplied with manure survived, which suggests a 

 means of control by supplying improved cultural conditions together 

 with care in avoiding infested soil. Where possible infested soil 

 should be sterilized by steam or by fire before using in flats or pots. 

 This will insure healthy plants. 



Black Spot iPhoma dcstvuctiva Plowr. ) — The Livingston Globe 

 variety and to a less extent other varieties in the second planting 

 were attacked by this recently described disease (6). The spots, 

 similar on botli sides of the leaf, were brown with a definite dark 

 l)rown margin, circular at first, then irregular, and finally confluent, 

 causing the death of the leaf. Very few spots were found on the 

 fruit, and these apparently following injuries from other causes, 

 sucking insects, etc. The fungus agreed with the description given 

 of Phoma destruciiva. 



WiiiT (Bacillns solanacrarnrn Erw. Sm.) — This serious disease has 

 on several occasions been reported from Porto Rico (1) and dou])t- 

 less does occur on tomato as well as on other related plants, but it 

 has not heen found in the present investigations. In the brown- 

 stained vascular tissues of the lower portion of the stalks of plants 

 killed l)y nematodes, bacteria were present, but were not capable of 

 independently causing wilt of otlierwise healthy plants. Nematodes 

 were the causes of all cases of wilting which it has been possible to 

 examine. 



]\riNOR Troubles. — Splits and cracks were very common. They 

 can dou])tless be attributed to extremes in the water supply, a drouth 

 followed by excessive rains, excessive fertilization, and the like. 



One case of rosette was observed. No cause was discerned nor 

 was the juice of the plant infectious. 



''Dampiug-off '" of seedlings occni'icd as with eggplant and dne 

 apparently to the same cause. 



Phyfophora i)ifrsfa)is IMont (De Bary) (Downy Mildew) has been 

 I'eported from near ]\Iaricao by Prof. Whetzel and Dr. Olive, but 

 has not been with certainty seen here. It is also reported by Hen- 

 ri cksen (5). 



Turnip (Brassica cafupestris and B. Rapa). 



A leaf spot (Cercospora Bloxami Berk. & Br.) is reported (11) 

 on tliis host. This is the same fungus as given under mustard. Not 

 serious. 



Black rot {Bacterium campestris Fa-. Sm.) is also reported (5) 

 but has not been encountered by us. 



115 



