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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Agricultural News, Trinidad, Symptoms include band of discolored, reddish-brown tissue about 5 cm from edge of leaf stems; discoloration extends into leaf petioles. Leaving bursaphelechus stump behind can lead to vector reproduction and spread the nematode.

Accordingly, being a species of economic importance with an established cocophipus, it is perhaps more prudent to leave it in Rhadinaphelenchus until a wider consensus is achieved. Association of the red ring nematode and other nematode species with the palm weevil, Rhynchophorus palmarum. Females have a long post uterine sac and a rounded tail.

Bursaphelenchus cocophilus

Incidence of the disease fell from 10 percent to 1 percent in Mexico with palm weevil control University of California, Davis, Department of Nematology. The survival stage is the J3. Fresh tissue should be placed in the basket and treated as previously described.

Nematode parasites of coconut and other palms. Recovery of Rhadinaphelenchus cocophilus Cobb, Goodey, from coconut tissues. This symptom is not as common in coconut palm as it is in African oil palm ChinchillaGiblin-Davis O anel vermelho do coqueiro, no estado do Ceara.

Tail elongate-subcylindrical with a rounded, unstriated terminus, anal body-widths long. Return to Bursaphelenchus Menu. Palm tree affected by red ring disease. Views Read Edit View history. Similar to Aphelenchoidesbut very slender and has sclerotized lip region. Journal of Nematology, 22 2: The palm weevils are attracted to wounds or cuts in the trunks of the palms. A survey of red ring disease of coconut palm in Grenada, West Indies.


The nematodes are then recovered by sieving. The palm weevil, Rhynchophorus palmarumis the vector of the nematode and life stages of R. Retrieved from ” https: Bursaphelenchus hylobianum Bursaphelenchus kevini Bursaphelenchus mucronatus Bursaphelenchus okinawaensis Kanzaki, et al.

As the leaves change color and dry up, they wilt and die. In leaves, stem and roots, they block water pathways, reducing the palm’s water absorption. They are closely related to the pine wilt nematode Bursaphelenchus xylophilus that causes pine wilt disease of pine trees. Larvae Larvae have high, dome-shaped heads, not offset from body.

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.

Up to nematodes can be found per gram of tissue; greatest numbers occur ” cm below upper limit of ring. About weeks after symptoms first appear the crown often topples over from the internal damage caused by the palm weevil larvae; but, the trunk remains standing in the field for several months until it decays.

In longitudinal section, the reddened tissue may appear as two united bands joined in the bole forming a U-shape or full circle.

Agricultura y Ganaderia Tropical, Peru, 1: Naturally infects coconut and oil palms, can be artificially inoculated into cabbage palm and a few others. At an infected palm, a weevil ingests the red ring nematodes or picks them up on the surface of its body. To view an adult Bursaphelenchus cocophilus click here. Trabalhos apresentados a VI reuniao Brasileira de nematologia, fevereiro deFortaleza. Head, spear and oespohagus as in female. Smaller-than-usual and dying leaves are one of the symptoms of red ring disease, caused by the red ring nematode Bursaphelenchus cocophilus.


Vulva slit-like appearing as an open C in ventral view, slightly over-hung by a wide, thick dorsal lip; posterior lip is also thick and heavily sclerotized. El anillo rojo del cocotero del Pacifico.

Postvulval uterine sac elongate, extending to about bursaphelenchuw. Experimentally, it has also been shown that red ring disease can be caused by the nematodes entering the plant through the root system. The nematode can be introduced with infected weevils or infected coconut palm material.

The vector, Rhynchophorus palmarum the South American palm weevilcarries the J3 stage to healthy palms.

Bursa or caudal alae terminal, prominent in dorsal or ventral view not easily detectable in lateral view as it does not project beyond tail contour with finely striated margins, enveloping distal 0. Boletim da Secretaria da Agricultura, Pernambuco, Brazil, codophilus O ‘anel vermelho’ do coqueiro e a fumigacao do solo com D-D. The meristematic tissue in the bud remains white and apparently healthy. These trees often stop producing fruit.

Texas Invasive Species Institute

Two important cases of nematode infestation in Surinam. The whole life cycle lasts approximately ten days. They show a browning instead of a characteristic reddening of the leaves and stem tissue. This procedure is especially recommended in the dry season when the weevils are most active in the cool nights.