26 BULLETIN 808, U. S. DEPAKTMENT OF AGRICULTURE. 



The barley jointworm, the rye jointworm, and the rye straw-worm 

 undoubtedly can be controlled in the same manner, if the necessity 

 arises. 



The wheat straw-worm is very easy to control. Since one genera- 

 tion is wingless it is only necessary to keep down all volunteer 

 ^vheat and never plant wheat nearer than 40 to 50 yards to infested 

 stubble. This is allowing a wide margin of safety since they are 

 supposed to be able to travel at most only 12 or 15 feet. 



Should it become necessary to control the straw- worms and joint- 

 worms infesting our cultivated grasses, such as timothy, orchard 

 grass, blue-grass, and Festuca sp., this undoubtedly could be accom- 

 plished by clipping such fields in the spring in order to delay the 

 appearence of seed stalks until the emergence of the insects, when 

 there would be no place for them to deposit their eggs. 



