622 Bulletin 8o. 



gallons water) was "put on to kill," as a spectator remarked. 

 The trees were soused with the mixture, and the entire foliage 

 and the limbs were deep blue as soon as the application had dried. 

 On the 9th of July, the application was repeated. At this time, 

 the first application appeared to have done no good. The foliage 

 was equally blighted in the sprayed and unspraj^ed portions, so 

 far as I could determine, although the disease did not appear to 

 have progressed much in the meantime. The fruits upon the 

 sprayed portions were much browned and discolored by the Bor- 

 deaux. The experiment seemed to be unpromising, and it was 

 not carried further. 



On September 21st, the orchard was visited again, and the 

 treatment was found to have brought the most remarkable results ! 

 The fruits upon the sprayed rows were nearly twice larger than 

 upon the untreated rows alongside, yellower and less fuzzy, and 

 they were markedly longer in form as well as much more uniform 

 in size. The russet discoloration of the Bordeaux mixture had 

 wholly disappeared. Fig. 8 shows an average quince from each 

 lot, three-fourths natural size. The differences of shape are quite 

 as marked as those of size. While I am unable to account for this 

 change of shape, it was easy enough to see that the increased size 

 was due to the persistence of the leaves upon the sprayed trees. 

 From one-fourth to one-half the entire foliage had fallen from the 

 unsprayed trees, and what leaves remained were small and yellow. 

 On the sprayed trees, however, the leaves were all intact and 

 they were large and dark green. It was noticeable that the tips 

 of the shoots on the untreated trees were almost uniformly bare 

 of leaves, and the leaves which stand directly against the base of 

 the fruit had fallen. Fig. 6 shows two characteristic twigs, the 

 short one upon the left being from an unsprayed tree, the other 

 from a sprayed tree. The leaves upon the shorter twig show the 

 spots of leaf- blight. Fig. 8 shows how the leaves persist next 

 the fruit upon the sprayed specimens, while they fall from other 

 fruits. These leaves must exercise an important office in the 

 growth of the contiguous fruit, for the quince has no stem in the 

 sense in which apples, pears and plums have, but the leafy branch 

 terminates directly in the fruit. I am not sure that I understand 

 why the sprayed quinces were so much less fuzzy than the others, 



