EELWOEMS. 



differently in the different plants it feeds upon. The mature 

 worm (fig. 32, 1) is -isih inch long, eel-like in form, and pointed 

 at each end ; by means of its piercing mouth-spine it enters the 

 roots and underground stem, making its way up into the tissue. 



9 



Fig. 31. — Wheat attacked by TyhnoJnifi sccnttnis, and 

 Galled Kernels, 



It is sometimes spoken of as the Stem Eelworm. In oats the 

 parasites cause the stems to become short, swollen, and con- 

 torted, and the edges of the leaves are often twisted, giving a 

 tulip-like appearance. Hundreds of acres of oats are frequently 



