8 FARMERS’ BULLETIN 173%, 
ghum and corn sirup have been tried in place of tree tanglefoot but 
with much less success, as they dry out too quickly; this necessitates 
more frequent applications and thus renders them more expensive. 
The hopperdozer should be drawn through the alfalfa and clover 
fields at the time when the crop is about half grown. It can, how- 
ever, be drawn at any time without injuring the plants, although it 
is not advisable to do so within five days of the time the crop is to 
be cut. If the adults are numerous at the time of cutting, the hop- 
perdozer should follow the rake. 
O 
