H03T-PAMSITE RELATIONSHIP 



Path 5 5 



SUSPECT ORGANISM 



An association occurs between a 

 neaatode and a root rot disease, 

 but f\mgi, bacteria and other 

 micro-organisms might be present. 



SAPROPHYTE 



The nematode occurs 

 in the lesion but 

 lacks any parasitic 

 capabilities. 



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PARASITE 



The nematode: 



(a) is morphologically 

 specialized for para- 

 sitism. 



(b) penetrates and 

 colonizes plant tissues 

 or feeds upon living 

 plant tissues. 



(c) reproduces -within 

 or upon the host 



AGGRAVATOR 



Indirectly the nematode may predispose unaffected 

 host cells to invasion by parasites through the 

 release into the lesion of toxic metabolic by- 

 products. 



VECTOR 





The nematode acts merely as a transporter of a 

 pathogenic organism. 



INCITANT 



The nematode initiates the development of the 

 disease but other organisms are directly in- 

 volved in the etiology. 



PATHOGEN 



The nematode cause the disease and no other 

 organisms are directly involved in the etiology. 



