Rev 02/13/2023
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Tylenchida Tylenchina Tyl;enchuloidea Tylenchulidae Paratylenchinae
Gracilacus mira Raski 1962
Synonyms: Paratylenchus mirus
.
Stylet long (77 µm), flexible.
Tail conoid to pointed.
Male: Unknown.
[Ref: Raski, 1962)
Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:
Northern California, vineyard soil.
Contra Costa and Mendocino counties, California.
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 thickening.
Type host: Grape, Vitis vinifera, on St. George rootstock.
Ecophysiological Parameters:
Young, vermiform, female inserts its long stylet into root tissues and remains attached to the root surface by the stylet. Female body swells as gonads mature. Eggs are deposited in a gelatinous matrix which surrounds the female, eggs and and newly hatched J2s.
Host Plant Resistance, Non-hosts and Crop Rotation alternatives:
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. Nematology 8:97-115.