Nematology (2000) 2, p. 793 (Troccoli)

Alberto Troccoli (2000)
Morphometrics of three species of Hirschmanniella (Nemata: Pratylenchinae) parasitising rice, with remarks on the genus
Nematology 2 (7), 793-793
Presented at the 25th International Nematology Symposium, Herzliya, Israel, 2-7 April 2000
Abstract: The genus Hirschmanniella Luc and Goodey, 1964 contains mainly tropical species, most of which are recorded as parasites of rice (Oryza sativa L.). They are easily distinguishable among members of the family by their very long and slender body, massive cephalic sclerotization, and elongate oesophageal gland lobe, but their identification at species level is rather difficult, owing to a strong resemblance to each other, and the habit of feeding preferably on the same host. The finding of three populations of Hirschmanniella from different geographic origins (identified as H. gracilis from Greece, H. oryzae from China and H. spinicaudata from Venezuela, all of them commonly occurring on rice crops) allowed an accurate comparative study of their morphology, with remarks on intraspecific variability for key characters within the genus. Morphometry of the three species is presented, with particular emphasis on cephalic region, stylet morphometry, shape of female and male tail, cuticular annulation, and other characters with diagnostic value, making identification easier. A new geographic record is also given for one of the species (H. gracilis), which was found for the first time in a natural habitat of a northwestern province of Greece.
Database assignments for author(s): Alberto Troccoli

Research topic(s) for pests/diseases/weeds:
identification/taxonomy

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Hirschmanniella oryzae	Rice (Oryza)
	Hirschmanniella spinicaudata	Rice (Oryza)	Venezuela
	Hirschmanniella gracilis		Greece