MYCOLOGICAL SECTION. 101 



that another season there will be a more hearty co-operation between 

 the vineyardists and Dei^artment in this work. 



One correspondent, George M. High, Middle Bass, Ohio, in a letter 

 under the date of December 28, says: 



Early last spring I received a circular from you, asking me to make some experi- 

 ments with remedies for the destruction of Mildew and Black-Rot. 



On the loth of June I sprinkled lime water, as directed in No. 2 of instructions, 

 upon 1 acre of Catawbas, about 1,000 vines. There was a heavy rain on the 24th, 

 washing the lime from the foliage. Tlie weather became quite hot, so on the 28th 

 I again sprinkled the vines. No perceptible advantage over vines alongside not 

 treated. Also upon 400 vines, both upon foliage and on ground under vineyard 

 rows, I sprinkled air-slaked lime June 7, 14, 22; July 5, 23; and August 9, with but 

 very slight beneficial results, if any. I imagined the wood ripened somewhat better 

 than upon untreated vines. 



Sulphate of copper and lime were applied as directed in remedy No. 3 with results 

 that convince one that, with proper application, this remedy will prove more 

 beneficial than anything yet known here for Mildew and Black-Rot. Fourteen vines 

 were selected — 8 together, the balance in different parts of vineyard, 12 Catawbas 

 and 2 Noahs. 



The first application was made June 14, spattering the foliage very thoroughly. 

 There was considerable rain on 20th and 21st instant, not entirely washing the leaves 

 clean. On 22d made a second application. First Mildew was observed 22d of July; 

 on the 23d I again put on the sulphate of copper and lime mixt\u-e, although the 

 previous application was yet quite perceptible upon the foliage. Of the vines so 

 treated not one was affected by either Mildew or Rot, the foliage holdmg its natural 

 color long after that on other vines had become brown and seared; the wood and 

 grapes ripened thoroughly. A Noah vme, upon which for several years the berries 

 had rotted more or less and dropped from the cluster about the time of ripening, 

 bore this season over 40 pounds of grapes of good quahty. 



The coming season I will give this remedy a more thorough trial, feeling satisfied 

 that it will prove effectual if applied in time. My impression is that two appli- 

 cations would be ample, the first soon after bloom or first indications of Mildew, 

 the second about the middle to last of July. 



I also treated 60 Catawbas with a preparation made as follows: Dissolve 1 pound 

 of sulphate of copper in 2 gallons of water; in another vessel slake 4 pounds of 

 lime in the same quantity of water : then mix these together thoroughly. The ad- 

 vantage was the preservation of the foliage in a healthy condition in a marked 

 degree over vines untreated. 



Bush & Son & Meissner, of Missouri, say: 



We have tried all the remedies recommended in your circular and find that desig- 

 nated as No. 3 to be the best. We are continuing to apply this mixtui-e of lime 

 with dissolved sulphate of copper (not too strong) with confidence in its good results. 



Another correspondent states that he has used Podechard's powder 

 (No. 4) with marked benefit. 



MILDEW REMEDIES IN FRANCE IN 1886. 



The results obtained in France in 1886 by the use of cupric fungi- 

 cides for Peronospora viticola fully confirm previous statements 

 and experiments. Those detailed by Mr. Millardet in Journal cV Ag- 

 riculture Pratique, November 25, 1886, are especially interesting. 

 The experiments at Dauzac and Beaucaillou were conducted either 

 by himself or by Mr. David. Eighteen remedial mixtures, dry or 

 fluid, were tried' very carefully with the necessary control experi- 

 ments, and full memoranda were made from time to time of the con- 

 dition of the various plots. The experimental fields covered in all 

 about 5 acres. The most important results are given in the follow- 

 ing tabular abstract, compiled from the report in the Journal. It 

 will be seen that the most completely protective substances were: 

 The copper mixture of Gironde; David's powder; Podechard's pow- 

 der; mixture of sulphate of copper and plaster; cupric steatite (a 

 bluish-white unctuous powder, composed of steatite and sulphate of 



