110 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



planted three years ago, and which even in the year following their 

 planting showed signs of disease, were now so virulently attacked that 

 practically not a single berry was free from the disease. The leaves also 

 on the youngest shoots were white with a powdery covering of conidia, 

 while the young wood and the berries were invested with a brown felt 

 containing the perithecia. From these English varieties the disease had 

 spread to the surrounding bushes, which were older and which had been 

 cultivated in the garden for several years. Of the 300 bushes in the 

 plantation more than half were attacked. The introduced varieties 

 which have become attacked so virulently are the following : — ' Careless,' 

 1 Columbus,' 1 Keepsake,' ' Mount Pleasant,' ' Speedwell,' ' Whinham's 

 Industry,' 'Admiral Renter,' ' Friiheste von Neuwied,' and 1 Whitesmith.' 

 The neighbouring Gooseberry gardens appear so far to be free from the 

 disease. 



Information as to the best fungicide to use against the present 

 disease, and the method of applying it, will be found in my previous 

 papers in this Journal. It may be pointed out here that the mildew 

 exists through the winter months exclusively in the form of ascospores 

 within the perithecia, lying more or less hidden in patches of the 

 persistent brown matted mycelium on branches, and especially on the 

 young wood. Every effort, therefore, should be made during the 

 autumn or winter months to cut off, and burn, the affected parts of the 

 young wood. 



BIBLIOGRAPHY. 



1. Salmon, E. S. : "The Gooseberry Mildew," Splm-rotlieca mors-uvre (Schwein.), 

 Berk. & Curt. (Jmirn. li.Jf.S. xxv. 139-142, fig. 37, 1900). 



2. Idem: "The American Gooseberry Mildew in Ireland" (I.e. xxvi. 778-770, 

 1902). 



3. Idem: "On the Increase in Europe of the American Gooseberry Mildew" 

 (I.e. xxvii. 590-601, fig. 16(5, 1902). 



4. Idem : " A Monograph of the Erysiphacew," p. 70-74 (Memoirs of the Torrcy 

 Bot. Club, ix. 1900). 



5. RoSTBUP, E. : " En farlig Stikkelsba?rsygdom indfort i Danmark " [A dangerous 

 Gooseberry-disease introduced into Denmark] (Haven, iv. 165-166, 1904). 



