with a definite brown margin. The minute black pyenidia were clus- 

 tered at the center. 



RuPT {Coleosporiuin Ipomoeae [Schw.] Burrj. — The rust was of 

 common occurrence but cannot be considered of any economic im- 

 portanee. Small yt How pustules l)roke out on the under side of" 

 the leaf. 



Two species of sooty mold {Meliola clavidata Wint. and Meliola 

 Ipoinocji Earle) occur on this host, but without causing apparent 

 injury. 



To:\JAT() {Lycopcrsicon escnhnfum) . 



The tomatos in Xhv test plots as well as those observed in gardens; 

 about the Island have suffered most severely from a numlier of dis- 

 eases, which can be held responsible in large measure for poor yields 

 obtained in some cases and the failures in others. There is again 

 to be noted the occurrence of different diseases at different seasons 

 of tlie year. 



Leap ^Moi.d {('Jndosporium fulvum Cke.) — This fungus also occurs 

 commonly on the wild berengena {Solanum tori'um), a very common- 

 weed in all parts of the Island. All varieties of tomatos (Trophy, 

 Livingstone globe, and Ponderosa) in the first planting (Deceml)er- 

 February). as well as those in other gardens grooving at this time 

 of the year were attacked. The disease commenced in the shelter of 

 the windbreak and spread very rapidly over the entire garden. The 

 lower leaves were attacked first, but with little delay the balance of 

 the plant was infected, only the very tips remaining free. Diseased 

 leaves soon withered and dropped with the result that the plant con- 

 sisted of but a few long spindling stalks devoid of mature leaves or> 

 fruit. Removal of diseased leaves was without effect in checking the 

 spread of the fungus. 



Spraying with Bordeaux was commenced before the Ckidosporhim 

 appeared, and although various strengths, combinations with lead 

 arsenate, and different kinds such as paste, powder, and home-made 

 solutions were tried, no differences were at any time observed between 

 sprayed and unsprayed rows. The number of sprayings varied from 

 three to eight on the different plots and were at intervals of a week 

 except in one instance, twice a week. 



The fungus was virulently parasitic, occurring on the lower sur- 

 face of the leaves in irregular velvety patches, which were white at 

 first, then brown, and finally nearly black. The various patches s(»on 

 coalesced l)y which time the leaf was yellow and curling. 



This di.sea.se was not found on any of the varieties grown in the 



112 



