468 



INJURIOUS INSECTS, ETC. 



The Stem Eelavor:\i [Tylenchus devastatrix, Kuhn.) 



I. Eelwomi. 2. Larva just emerged from egg.* 

 3. Eelworm and egg in plant tissues. 

 (All much magnified ) 



The mischief effected by this species of the eelworms> 

 or AnguillulidcB, known as the stem eelworm [Tylenchus 

 devastatrix) appears to be extending. During the past two 

 or three years many complaints have been received of the 

 failure of various kinds of crops from some unperceived 

 cause, which has on examination proved to be the stem 

 eelworm. Wheat, oats, hops, clover, and onions were the 

 principal subjects of this infestation submitted for investi- 

 gation, and in all cases eelworms of the species Tylenchus 

 devastatrix were found in the stems of the affected plants. 



As a rule, there were no signs of any insect or fungoid 

 attack, except in some of the diseased clover plants, in which 



* This figure is reproduced from Dr. Ritzema Bos' V Anguillule de la Tige, with 

 his courteous permission. 



