•THE.AICFmCOPE- 



:ated 



nAG7\ZINE. 



Vol. XI. 



TEENTON, N. J., OCTOBER, 1891. 



No. 10. 



ORIGIMAL 

 C^A/AVMICATIonS 



THE ROOT-GALL NEMATODE. 



JAS. C. NEAL, PH. C, M. D., ENTOMOLOGIST AND BOTANIST, FLA. EXP. 



STATION. 



(with PLATE V.) 



THE nematode, which may or may not be Tylenchus arenarius 

 or Heterodera radicicola, is the cause of a mysterious dis- 

 ease of the roots of many of our field crops, nearly all our vege- 

 tables and some of our finest fruit trees, and is particularly de- 

 structive to " truck-patches " in the Southern States. Recently 

 it has caused much anxiety in Australia, where it has been in- 

 vestigated by Dr. Cobb. 



The study of this worm requires an outlay of skill and 

 patience that, to put it mildly, is prodigious, and, were it not of 

 such vast importance to our agricultural interests to follow up 

 its life history, in the hope of discovering a method to alleviate 

 its ravages, very few microscopists would spend time upon so 

 illusive a subject. 

 19 



