EXPERIMENT STATION REPORTS. 



231 



pest, especially in our state where the sale of fancy fruit in Chicago as- 

 sumes such proportions. The peach-thrips does not destroy so much 

 fruit but it puts what would otherwise be a fancy peach in the cull 

 class and if any appreciable proportion is so affected, the money loss 

 is severe. 



THE SPRUCE CONE WORM. 



(Dioryctria remculella.) 



A larva, whose adult was identified for us by Dr. August Busck of the 

 National Museum, appeared during early June, 1923, on the young and 

 tender leaders of Norway spruce. This slender larva which measured 



Fig. 11 — ^Work of spruce cone-worm on leader of young Norway spruce 



Fig. 12 — The spruce cone-worm, larva and adults 



