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Length = (av. = ) �m; width = (av. = ) �m. Female: Adult white, lemon-shaped with large egg-mass often almost. During to in several nematological surveys in the Tepeaca Valley, Puebla, Mexico, carrot cyst nematode, Heterodera carotae was. General information about Heterodera carotae (HETDCA).

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Vermiform with a short rounded tail, cuticle annulated, stylet well developed, labial disc slightly oval with six indistinct postlabial annuli. At first the male and female juveniles look similar, both being threadlike and growing to 1. A new cyst nematode, Cactodera torreyanae sp.

Heterodera carotae (carrot cyst nematode)

White females and cyst attached to secondary roots Fig. Tests of nine plant species from five families for infection of H. Datasheet Heterodera carotae carrot cyst nematode.

The Tepeaca Valley in this state is known as an important vegetable producing area and it is constituted by 13 municipalities.

Then roots were stained carottae the acid fuchsin lactoglycerol technique to observe nematode stages inside of roots Bybd et al.

Heterodera carotae

Cephalids indistinct; anterior ones level with third body annule and posterior part level with eighth-ninth body annule. Phylogenetic relationships of the Mexican population of H.


Journal of Nematology 24 4S: Up to now, 15 species of cyst nematodes from four genera, Globodera, Punctodera, Cactodera, and Heterodera have been known in Mexico and with our new finding of H. Carotse improved technique for clearing and staining plant tissues for detection of nematodes. Although carrot yield losses caused by this nematode is xarotae exactly estimated, however, the growers have been forced to stop sowing carrots where the nematode is present.

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During to in several nematological surveys in the Tepeaca Valley, Puebla, Mexico, carrot cyst nematode, Heterodera carotae was found parasitizing carrots, Daucus carota. Two generations may also develop on greenhouse-grown carrots Stelter, Commonwealth Institute of Helminthology. Excretory pore av.

EPPO Global Database

Patches with poorly developed carrots were carotaee in the infected fields of the Tepeaca Valley, Puebla, Mexico Fig. Median-joining networks for inferring intraspecific phylogenies. Head slightly offset with four indistinct post-labial annules. Systematics of cyst nematodes Nematoda: No penetration of the nematode and any stages were observed in roots of the other plants tested. Jones, b ; Mugniery and Bossis, De la Jara-Alcocer, F.


Mature cysts small, lemon-shaped with distinct neck and vulval cone; neck often twisted. After 65 days, the other plot was used to obtain females, the roots were separated, gently washed, heterodega put in a Petri dish for its examination under Motic stereoscopic microscope.

Chlorosis and reddish foliage. Posterior probabilities are given on appropriate clades.

Four weeks after invasion the juveniles moult and the females become mature. Total seven unique COI haplotypes were identified for H.

EdsCyst nematodes, Plenum Press, London, Phylogenetic relationships within populations and species of the Goettingiana group of the genus Heterodera as inferred from Bayesian analysis using the ITS rRNA gene sequence dataset. The new sequences were deposited in the GenBank under accession numbers: Dehydrated egg-masses may persist in the soil either free or adhering to the cyst or to pieces of root.