Submitted to: Journal of Nematology
Publication Type: Abstract Only
Publication Acceptance Date: 6/23/2000
Publication Date: N/A
Technical Abstract: It has been suggested that second stage juveniles (J2s) of the Potato Cyst Nematodes (PCN) may use chemical signals from host roots to identify appropriate invasion sites (such as behind the root tip). Preliminary studies demonstrated the ability of J2s to orientate towards the roots of it's primary host plant, potato. The effect of several potential chemo-attractants on juvenile movement in sand columns was assessed. Potato root diffusate (PRD), certain G-10 separated PRD fractions and several other compounds stimulated significant movement of water hatched J2s. These included IAA (10-10M), IBA (10-11M) and a mixture of eight different cytokinins identified in PRD. In addition, secretions from a large number of water hatched J2s also stimulated significant J2 movement. These and other compounds were also screened for their ability to attract J2s over a concentration gradient using both agar and sand based assay systems.