i66 



Bulletin 235. 



In the face of these facts, I had httle hope that even a stronger 

 poisonous apphcation with the more adhesive arsenate of lead would 

 reach this quince pest. But one extensive quince grower, Mr. H. L. 

 Brown, Carlton, desired to try this poison, and in 1904 I sent him 20 

 pounds witli directions to use it at the rate of 2^ pounds in 50 gallons of 

 water or Bordeaux mixture, making two applications, the first as soon as 

 there were any signs of the beetles and the second about a week later. He 

 sprayed a block of 100 quince trees with the poison according to directions 

 on July 5th and 15th, making only one application on part of the trees. 



Fig. 42 — Jarring for quince curculio. 



In Sc])tcmbcr, Air. Brown reported that " the evidence seems to be very 

 much in favor of the two sprayings, and in comparing this block with the 

 two others treated with Paris green, I will say that the arsenate of lead 

 seems to be very much ahead." Several who saw Mr. Brown's orchard 

 stated that the fruit on the trees sprayed with the latter poison was much 

 superior to that on the other trees, as it was much freer from curculio 

 injury. 



The results obtained in the single experiment in 1904 were so en- 

 couraging tliat Mr. Brown and another large quince grower gladly co- 

 operated with me in a similar experiment with the same poison during 



