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Observations On the Feeding of Xiphinema Diversicaudatum

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During a study of Xiphinema diversicaudatum feeding on Petunia hybrida growing in agar the two main types of feeding activity, apart from penetration and retraction, were periods of oesophageal bulb pulsation and long periods of quiescence. During oesophageal bulb pulsation the nematodes were ingesting plant cell constituents. During the quiescent periods the nematodes may have been salivating. Feeding behaviour varied depending on the part of the root being fed upon. When feeding on fully-formed galls nematodes changed their feeding position within and on the root frequently. There were no periods of quiescence. When feeding on root-tips or developing galls individual feeds lasted longer because there were long periods when the nematodes became quiescent. When feeding on the piliferous or older parts of the root some feeds lasted for several hours. Again nematodes usually became quiescent for part of the feed, but there were also extended periods of ingestion when the tip of the odontostyle was in the region of the phloem.

Affiliations: 1: Scottish Horticultural Research Institute, Invergowrie, Dundee DD2 5DA, Scotland

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/content/journals/10.1163/187529276x00409
1976-01-01
2016-12-11

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