ii6 



FRUIT CULTURE UNDER GLASS. 



and soot in equal parts applied to the pipes, also help to 

 keep it in check : the former does no harm to the vines, 

 but it must not be applied till the grapes have approached 

 the stoning period, or the result will be rusted berries. 



When vines get dry at the roots, they are very subject 

 to spider ; and it is important for this cause, if for no 

 A/ other, to keep them regularly moist. 



The old loose bark should be cleanly 

 removed from vines every year, and be 

 dressed with the mixture recommended 

 at page 87. Every part of the wood- 

 work and glass should be thoroughly 

 scrubbed every year, and kept well 

 painted, the walls washed with hot 

 Fio. 11. lime, having a little sulphur mixed with 



it, the pipes painted yearly, and every crevice in which 

 the foe can find a refuge fiUed up. 



Thrip (fig. 12). — This is an insect which can hardly be 



said to be indigenous to the 

 vine ; but when plants^ 

 such as azaleas and others, 

 are kept in vineries, thrip 

 is very apt to get on the 

 vines. It is very trouble- 

 some and destructive. Of 

 course the best preventive 

 is to keep 'plants which are 

 subject to it o&tof vineries. 

 Hand-sponging and fumi- 

 gating with tobacco-smoke 

 for two or three consecutive evenings are the most efi'ec- 

 tual ways of dealing with it. Like the spider, a dry warm 

 atmosphere favours the spread of the thrip. 



Fig. 12. 



