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Gracilacus straeleni (De Cononck, 1931) Raski, 1976
Note: Many authors gave not accepted Raski's creation of the genus
Gracilacus based largely on stylet length and swelling of body.
In those cases, this species is described as Paratylenchus straeleni.
Male: Less ferquent than females.
[Ref: Raski, 1976)
Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:
Several reports from throughout USA and worldwide.
Young, vermiform, female inserts its long stylet into root tissues and
remains attached to the root surface by the stylet. Nematode feeds in epidermal,
cortical parenchyma and sclerenchyma cells. Feeding induces cell wall
Host Plant Resistance, Non-hosts and Crop Rotation alternatives:
Ghaderi, R., Kashi, L., Karegar, A. 2014. Contribution to the study of the
genus Paratylenchus Micoletzky, 1922 sensu lato (Nematoda: Tylenchulidae).
Raski, D.J. 1962. Paratylenchidae n.fam. with description of five new
species of Gracilacus n.g. and an emendation of Cacopaurus Thorne, 1943,
Paratylenchus Micoletzky, 1922 and Criconematidae Thorne, 1943. Proc.
Helminthol. Soc. Washington 29:189-207.
Raski, D.J. 1976. Revision of the Genus Paratylenchus Micoletzky, 1922
and Descriptions of New Species. Part III of Three parts--Gracilacus. J.