PROGRESS EEPORT ON THE EUROPEAN CORN BORER 
23 
curled or yellow clock, green foxtail, lamb's quarters, bread grass, 
pigweed, common ragweed, smartweed, and common thistle. 7 Here, 
occasional borers have also been found in the stems of soy bean, 
sorghum, 8 Japanese millet, 8 broom corn millet or proso, buckwheat, 
rhubarb, 8 kidney or wax bean, 8 milo 8 tomato stem and fruit, potato, 
dahlia, 8 and cosmos. 8 During 1923 two fields (a total of 12 acres) 
Fig.. 5. 
-Beggar ticks (Bidens sp. ) showing typical injury by the European corn 
borer 
of broom corn grown at Irving, N. Y., showed stalk infestation of 
12.7 and 15.8 per cent respectively. In Ohio, according to reports of 
F. AY. Poos to December 31, 1924, occasional borers have been found 
in the following host plants in addition to corn: Smartweed, pig- 
weed, cocklebur, ragweed, water hemp (Acnida tuberculata Moq.), 
beggar-ticks, old witch grass, 7 and barley. 
8 Found infested in experimental plats only. 
