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Ditylenchus angustus (rice stem nematode )
Ditylenchus angustus
rice stem nematode
Anguillulina angusta, Tylenchus angustus
Asia: Bangladesh, India, Malaysia Myanmar, Philippines, Thailand.
Not known to occur
2024-11-26
nematode
Korea
Main: rice
DITYAN
Primarily spread through irrigation water. Can remain dormant and resist desication until fields are flooded (DITYAN-5). Debris and ratoons are primary sources of inoculum. D. angustus could be spread in infested soil and plant material. The risk of international seedborne dispersal in dried seed is not significant (CABI).
1 Known Hosts
Oryza sativa
rice
Yes
DITYAN-2, DITYAN-3, CABICPC, DITYAN-5
Although there are several reports of this nematode being seed borne, the importance seed inoculum is under investigation. Seed transmission is low when seed is dried.
Yes
Visual examination
Visual examination of seeds for nematodes was done in research. This method has not been standardized or validated.
DITYAN-3
Seed treatments
Control of weeds and volunteer rice, prevention of river overflow by dikes and clean cultivation, and early roguing of diseased plants are suggested as control measures.
CABICPC
DITYAN-2
Tin Sein, 1977. Seed-borne infection and ufra disease. International Rice Research Newsletter, 2(2):6 (verified via abstract)
DITYAN-3
Prasad JS, Varaprasad KS, 2002. Ufra nematode, Ditylenchus angustus is seed borne!. Crop Protection, 21(1):75-76.
CABICPC
DITYAN-5
Nemaplex.UCDavis.edu; Revision Date: 11/19/2019; Accessed 11/26/2024
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