19 



out at once, while those which had not received pollen did not 

 develop immediately, but waited, as it were, for this process to take 

 place. Thus as the pollinated hops began growth a week to ten 

 days before the controls, it became a matter of great interest to 

 follow the subsequent development of both. 



It was found that the non-pollinated hops never recovered their 

 lost ground. They turned out at picking time to be small, green 

 and unripe, and compared very unfavourably with the well-grown, 

 bright yellow and ripe pollinated hops. The difference between the 

 two sets was so great in all respects that they would never have 

 been taken for hops of one variety, much less for hops growing on 

 the same bine and on opposite pairs of laterals. While the controls 

 were very small and green, the pollinated hops only differed from 

 the normal hops on the same bine in being rather more 

 symmetrical and better developed specimens with the free ends 

 well closed in. 



The differences between the two sets of hops at picking time 

 may be seen in Fig. 2. The control hops are in the centre, the 

 bunches on either side having been pollinated. Fig. 2 represents 

 three bunches of COLEGATE'S hops from the same bine and developed 

 from laterals of nearly equal strength. The control bunch in the 

 centre is quite seedless, while the pollinated bunches on either side 

 are well seeded. 



A further point of some interest was noted when the experi- 

 mental hops were picked. It was found that the controls, which, in 

 all cases, turned out to be seedless, were attacked by " mould " 

 Sphavotheca Humuli (D.C.) Burr. to a much greater extent than 

 the seed hops which had been pollinated. Indeed these latter were 

 singularly free from this parasite. Fertilisation, therefore, seemed 

 not only to stimulate the growth, to hasten ripening, and to improve the 

 colour, but also to increase the mould-resisting power of the hop 

 itself. 



The behaviour of the experimental hops suggested the desir- 

 ability of extended observations in hop gardens to determine, if 



C 2 



