fresh soil may give rise 'to infection. In particular, seed tubers 

 from diseased Potato crops are responsible for the dissemination 

 of the disease. In Shropshire, black scab is confined practically 

 to gardens and allotments on light soils, and occurs mainly in the 

 north and east of the county. No fungicide of the many tried in 

 the course of the investigation has been found to have a decidedly 

 beneficial effect in reducing the disease, though a summer dressing 

 of copper sulphate destroys the motile spores liberated during that 

 period. More definite results have been obtained from the testing 

 of relatively immune varieties, and it is recommended, in conse- 

 quence, to grow Southern Queen and Southern Star as earlies 

 with Conquest for the main crop. Of late varieties, Abundance, 

 Langworthy, and Peacemaker showed a superiority with respect to 

 resistance over the other varieties which were tested. Those inte- 

 rested in the subject are recommended to apply to the college for 

 a copy of the pamphlet, which, we understand, will be sent to 

 applicants free of charge. 



W. J. Z. Black stripe in Tomatoes. Gard. Chron., XVLffl, 

 3rd, p. 197. London, Sept. 10, 1910. 



This disease is reported as usually making its appearance when 

 the plants are 2 feet to 3 feet in height. A black streak appears 

 in the stems here and there, and, if not immediately checked, the 

 disease spreads through an entire house with great rapidity, com- 

 pletely spoiling the plants, if not killing them outright. 



Black stripe enters deeply into the tissues, as will be seen on 

 cutting a section of the stem ; growth appears to cease, and the 

 cells shrivel in the affected parts. The disease quickly spreads to 

 the fruit and leaves, which become deformed and covered with a 

 network of black lines, growth becomes weak, jand the flowers, 

 which are not already set, fall off. 



It is stated most prevalent in houses in which Tomatoes have 

 been cultivated year after year, especially if the plants are grossly 

 fed and inclined to grow rank. 



The author has tried several good fungicides, also dusting, 

 and vaporising with flowers of sulphur (the latter, by the way, is 

 excellent for mildew), but all these remedies had little or no effect 

 on black stripe. Excessive sun-heat is the only remedy found ef- 

 fectual in checking it. The house is closed about noon on a bright 



