|Morphology and Anatomy||Life Cycle|
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Needle nematodes, like dagger nematodes, are very large, ranging in length from 2 to 8 mm.
The odontostyle is connected to the lining of cheilostome by a cuticular membrane that becomes variously folded, with refractory qualities - the "guiding ring." In Longidorus, the guiding ring is located within two lip-widths of the anterior portion of the nematode.
Females of Longidorus have two ovaries that are opposed and reflexed.
Characters used for identification of Longidorus (Franco
Worldwide, usually moist environments.
For an extensive list of host plant species and their susceptibility to this genus, copy the genus name
select Nemabase Genus Search and paste the name in the Genus box
The first juvenile stage emerges from the egg and passes through three more juvenile stages.
Males are rare in most species and presumably unnecessary for reproduction in those cases (Raski, 1988), although amphimictic populations do occur (Ye and Robbins, 2004).
Severe stunting of loblolly pine seedlings at a south Georgia nursery. Nematode populations increased in containers with slash, loblolly, and longleaf pine seedlings. The Longidorus sp. significantly reduced the dry root weights of slash (P = 0.008) and loblolly (P = 0.047) but not longleaf (P = 0.095) pine compared with controls (Fraedrich et al., 2003).
As and example, the Longidorus sp. damaging to loblolly pines decreased on nutsedge and small grains. Periodic rotation from pine production to grow cover crops consisting of small grains important management practice this species (Fraedrich et al., 2003).
Fraedrich SW, Cram MM, Handoo ZA 2003. Suitability of southern pines, other selected crops, and nutsedge to a Longidorus sp associated with stunting of loblolly pine seedlings. Plant Disease 87:1129-1132.
Ye WM, Robbins RT. 2004. Longidorus biformis n. sp and L. glycines n. sp (Nematoda : Longidoridae): Two amphimictic species from Arkansas. Journal of Nematology 36:1-13.