Root-Lesion Nematode
Pratylenchus mulchandi Nandakumar & Khera
Pratylenchus brachyurus (Godfrey) Filipjev & Sch. Stekh.
Pratylenchus zeae Graham
Symptoms: Symptoms on pearl millet are not described
in the primary citations. Reduced vigor is implied. General symptoms
on maize include poor root growth, necrotic root lesions, root
decay, moderate stunting (Shurtleff 1980).
Pathogen and disease characteristics: Endoparasitic
nematode. Feeds mainly on rootlets and roots and occasionally
on root hairs, rarely on tips of root cap cell masses. Its head
region is embedded deep into the plant's cortex while it feeds
on the main roots. Superficial feeding, confined to epidermal
cells, occurs occasionally. Prolonged feeding at the same site
did not cause any necrosis on pearl millet roots.
Host range: Pearl millet, sorghum, sudangrass. Also
other grasses and cereals, sugarcane, legumes, tobacco, tomato,
potato, strawberry, tree fruits, pines (Shurtleff
1980). Consult other references for additional hosts.
Geographic distribution: USA, India.
Nomenclature discrepancies: Alternative common name:
Lesion nematode.
Seed transmission: Not transmitted by seed.
Primary citations: Johnson and
Burton 1973, Nandakumar and Khera
1973.
United States
Department of Agriculture
Agricultural
Research Service
The material on this page is in the public
domain.
Original posting: June 5, 1999.
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