Symptoms: Nematode-infested seed are elongated, with a longitudinal fissure approximately two-thirds the length of one side. There is a small slit on the micropyle of the hilum region. Infested seed are shrivelled and dark gray or grayish black. They weigh less than healthy seed.
Pathogen and disease characteristics: Generally a common soil nematode. Seed can become infested when panicles are in contact with the soil.
Host range: Pearl millet, rice.
Geographic distribution: India.
Nomenclature discrepancies: None.
Seed transmission: Seeds are infested. Fumigation with methyl bromide (32 g/m3) under vacuum for 4 hours does not kill the nematodes in dry seeds, but this treatment is effective on hydrated seeds. Infested seeds do not germinate.
Primary citation: Panchbhai et al. 1987.
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Original posting: June 5, 1999.