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Eel Worm (Nematode) 



Effect on root and much enlarged eggs 



at different stages, found in roots. 



Potato Eel Worm (Heterodera radicicola) 



The Eel Worm 



(Heterodera radicicola) 



These, and allied Nematode worms, are doing much more damage 

 in the coast and mountain states than most growers are aware of. 

 The fact that they seldom or never kill a tree or actually destroy 

 a potato is probably largely responsible for this. The insect is a 

 microscopic worm which lives about ^ to ^4 of an inch beneath 

 the surface in plant roots of all kinds. We find its work in the 

 roots of all kinds of garden plants, citrus and deciduous trees, and 

 especially potatoes. These last show it by warts appearing all over 

 the tubers, the skin even on these warts, not being much roughened, 

 and on cutting the potato, dark specks will show just under the 

 skin. The infested tree and plant roots are much misshapen by 

 warts or swollen to shapeless masses, according to how badly they 



