JOUENAL 



OF THE 



Royal Horticultural Society. 



Vol, XXVIII. 1904. 

 Parts III. and IV. 



PESTS OF THE VINERY AND STOVE. 



By M. C. Cooke, M.A., LL.D., A.L.S., F.R.H.S., V.M.H. 



The two sections of this communication treat of the fungoid diseases 

 (1) of the Vine, and (2) of other plants cultivated in the hothouse. The 

 pests which nourish at this high temperature seldom cause any trouble 

 under other circumstances ; but the close, heated, and moist atmosphere 

 of the stove is especially favourable to the development of fungus para- 

 sites, and great care should be taken to recognise their earliest appear- 

 ance, and hold them in check. 



Vine Leaf-spot. 

 Septoria Badhami (Berk.), PI. XIII. fig. 2. 



This is not a common parasite, although we met with it several times 

 about twenty years ago. 



It was first recognised in 1858, forming little brownish spots on the 

 leaves, upon which were seated a few of the dotlike conceptacles, which 

 occur in clusters on either side of the leaf. On one occasion we found 

 the spots to be wholly marginal, becoming confluent around the greater 

 portion of the leaf. The conidia, or sporules, are elongated or some- 

 what club-shaped (35-50 /x long), with a few minute granules, and they 

 appear to be rarely, if ever, septate. 



Sacc. Syll. iii. 2581 ; Cooke, Hdbk. No. 1309 ; Berk. & Br., Ann. N.H., 

 No. 748, t. 15, f. 9 ; Thilm. Pilz. Wein. p. 180. 



Small Vine Leaf-spot. 

 Phyllosticta Badhami (Cooke), PI. XIII. fig. 1. 



Not less than fifteen other kinds of leaf-spots have been described as 

 occurring on living vine-leaves, in addition to nine species of anthracnose. 



B 



