A comparison of Tables IV with Tables I and II is sufficient to show 

 that green vitriol (copperas) has nearly as injurious an effect upon the 

 seed as blue vitriol. There was no scorching of the leaves noticeable, 

 however, resulting from treatment with copperas, even with the strong- 

 est solution. 



treatment of black-rot, brown-rot, downy mildew, 

 powdery mildew, and anthracnose of the grape; pear 

 scab and leaf-blight, and apple powdery mildew. 



By B. T. Galloway. 



black-rot.* 



The experiments of the past two years have demonstrated beyond 

 question the possibility of cheaply and effectively preventing this dis- 

 ease. Many things, however, in connection with its treatment remain 

 to be discovered, so that rules now laid down will probably have to be 

 modified, as future work gives us a better insight into the nature of the 

 disease and the effects of different fungicides upon it. In the light of 

 our present knowledge we would suggest the following lines of treat- 

 ment, from which we will leave our readers to make their own selec- 

 tions, since there is little choice, so far as the actual value of the rem 

 edies are concerned. 



I. After pruning, collect and burn all the trimmings, also as many of 

 the old berries and leaves as possible; the object of this is to destroy 

 the fungous spores which are known to pass the winter in these 

 parts. This accomplished, watch the vines carefully, and as the leaves 

 begin to unfold apply the Bordeaux mixture, formula 6, taking care to 

 have it reach all parts of the vine above ground. About the time the 

 flowers are opening make a second application of the same formula, 

 this time giving particular attention to the green parts. A third spray- 

 ing should be made twelve or fifteen days later, a fourth after the lapse 

 of a similar period, and so on until the berries begin to color. A line 

 of treatment, such as the foregoing, will necessitate six or seven spray- 

 ings, and the total cost of the same will probably range from $5.50 to 

 $7 per acre, or practically 1 cent per vine. 



II. Treat the vines exactly as in I, excepting the first application, 

 which may be omitted entirely, the first spraying being the one made 

 when the flowers are opening. It is not out of place to say here that in 

 no case should the first spraying be postponed later than the last-men- 

 tioned period. This treatment will, of course, cost less than I, but 

 whether it will pay to omit the first spraying is one of the questions not 

 yet determined. 



III. Treat the same as I, but after the third application abandon the 



'Lceetadia Bidwellii, (Sacc.) V. E. 



