Although cocophilus is undeniably close to other species in the genus Bursaphelenchus (and may well prove to belong to that genus), there remains some. Bursaphelenchus cocophilus. Red Ring Nematode. Synonym: Rhadinaphelenchus cocophilus. Rhadinaphelenchus was designated a junior. The red ring nematode, Bursaphelenchus cocophilus, was first described by Cobb. () as Aphelenchus cocophilus from specimens in.

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Texas Invasive Species Institute

Generate a print friendly version containing only the sections you need. The palm weevil, Rhynchophorus palmarumis the vector of the nematode and life stages of R. The disease occurs more commonly in trees 2. In external symptoms, already-established leaves become short and deformed and turn yellow-bronze, then deep reddish-brown.

The surface of the cut in a healthy tree appears a solid, creamy white. These young trees usually die six to eight weeks after the appearance of symptoms. Recovery of Rhadinaphelenchus cocophilus Cobb, Goodey, from coconut tissues. Male tail is curved and pointed with short, oval caudal alae at tail tip – hence the genus name.

In some African oil bhrsaphelenchus and older coconut palms, infected trees begin to produce small, deformed leaves that retain their green color and are bursaphelejchus initially necrotic. Native Origin Native Origin: Of 12 females he examined, one possibly possessed a vulval flap.

Leaving the stump behind can lead to vector reproduction and spread the nematode. Infested palms should be sprayed with an insecticide and then destroyed as soon as possible once the presence of red ring nematodes has been confirmed. Trees that have been affected by red ring disease for bursaphdlenchus than bursaphelencyus years are noticeably stunted compared with occophilus trees of a similar age Chinchilla O anel vermelho do coqueiro, no estado do Ceara.

Distribution Table Top of page The distribution in this summary table is based on all the information available. Treating infested palms with nematicides is difficult because the nematicides do not easily spread throughout an infested tree and often do not penetrate the area of the trunk usually inhabited by the nematodes Chinchilla Bursaphelenchus cocophilus causes red ring disease of palms. A survey of red ring disease of coconut palm in Grenada, West Indies. In Trinidad, red ring disease kills 35 percent of young coconut trees.


To view an adult Bursaphelenchus cocophilus click here Ecological Threat Bursaphelenchus cocophilus causes serious damage to coconut palms in the Neotropic region and also in Brazil where it is vectored by the weevil Rhincophorus palmarum.

Tail strongly curved ventrally may form 1. El anillo rojo del cocotero del Pacifico. In coconut tissues, R.

bursaphelendhus Effective patterns of control may be employed during several phases of the development of the epidemic. Procorpus elongate-cylindrical; metacorpus or median bulb oval, usually about twice as long as wide, with prominent valve-plates just posterior to centre; dorsal oesophageal gland orifice midway between anterior margin of bulb and valve plates. It is the bursahpelenchus larval stage that is typically deposited in a palm by Rhynchophorus palmarum as it lays its own eggs there.

If the bursaphelenchs is able to utilize the native weevils bufsaphelenchus would expand the range of threat from just California and Texas, where the South American Palm Weevil is present, to all states where palm trees grow or are imported.

Epidemiology Red ring disease in new groves generally ckcophilus by infection of a year old palm by the palm weevil, Rhynchophorus palmarumcarrying R. The survival stage is the J3. The main vector of red ring disease is the palm weevil, Rhynchophorus palmarumalthough vectors such as ants, spiders and other types of weevils also have been reported.

As ofthere are about 70 [2] to 90 [3] species in the genus. This can be modified by actually macerating the diseased tissue in a blender in order to liberate more lethargic nematodes.

Eventually, these new “little leaves” display varying degrees of necrosis. In the surrounding soil, nematode concentration is generally low.

One gram of such tissue can contain as many of 10 nematodes. Discoloration occurs before appearance of leaf symptoms and can be detected by stem borings ; allows roguing to prevent spread.


From Wikipedia, the free encyclopedia.

red ring nematode – Bursaphelenchus cocophilus Cobb

There is some evidence bursphelenchus suggest that nematodes may persist in beetle larvae through molts, but this is unclear. These trees should be cut into sections and treated with insecticide or burned Giblin-Davis Notes on Taxonomy and Nomenclature Top of page The generic placement of this species requires confirmation as some authors regard it as belonging to the monotypic genus Rhadinaphelenchus and others to the genus Bursaphelenchus.

The role of the palm weevil, Rhynchophorus palmarumas a vector of red ring disease of coconuts. In leaves, stem and roots, they block water pathways, reducing the occophilus water absorption.

The yellow dwarf cultivars respond in the same way as the green and the crosses between talls and dwarfs, or between Panama tall and any dwarf. On their own, red ring nematodes can move 5.

Bursaphelenchus cocophilus pest information

Red ring nematodes invade both palm tissue and roots. The most common color of the band is coccophilus red, although the shade can vary from light pink or cream to dark brown in infected African oil palms. Agricultural and horticultural problems of Brazil. The Diseases of the Coconut Palm. In coconut and the palmiste palms the nematodes are most active in the stem tissue except in the very necrotic regions.

The red ring little leaf syndrome in oil palm and coconut palm. These nematodes are phoretic, dispersed between trees when their dauer larvae are transported by insects.

Nerve ring a wide band surrounding bursapehlenchus about 0. Roguing of diseased palms: Biology These nematodes reproduce sexually and have a 10 day life cycle, and can migrate and survive in soil, especially moist areas.