Ditylenchus angustus

Ditylenchus angustus	Contents	Rev 12/28/2005
Rice Stem Nematode	Classification	Hosts
	Morphology and Anatomy	Life Cycle
Return to Ditylenchus Menu	Economic Importance	Damage
	Distribution	Management
Return to Anguinidae Menu	Feeding	References
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Classification:

      Tylenchida
       Tylenchina
        Tylenchoidea
         Anguinidae
                    Ditylenchus angustus

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Morphology and Anatomy:

Nematode is 0.8-1.2 mm long.

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Distribution:

India, Egypt, Madagascar.

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Economic Importance:

Nematode causes "Ufra" disease of rice.

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Feeding:

Nematode is found in terminal buds a few days after rice seedlings are transplanted.

Feeds ectoparasitically on newly formed bud tissues.

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Hosts:

Rice.

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Life Cycle:

Nematode is spread through irrigation water.

Can remain dormant and resist desiccation until fields are flooded.

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Damage:

Host tissues may become malformed, stunted, wilted; leaf sheaths are distorted; flowers are sterile; upper nodes show lesions.

Grain yield may be reduced by 50% or more.

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Management:

Phytosanitary methods, burn rice stubble.

Nematicide Dazomet shows promise in some tests.