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

Palms that are already infected and dying from red-ring disease give off a chemical that attracts even more weevils Giblin-Davis et al. Over a year period in Venezuela, 35 percent of oil palms died from red ring disease.

Rhadinaphelenchus cocophilos Cobb, n. Vincent, Surinam, Tobago, Trinidad and Venezuela. 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.

Bursaphelenchus cocophilus – Wikipedia

In some areas, infected trees can ccoophilus several bursaphelencbus years, and in some of these trees, the disease becomes chronic, manifesting itself in the continuing production of little leaves for years. Male Body ventrally arcuate, more strongly curved in tail region. University of California, Davis, Department of Nematology. Leaving the stump behind can lead to vector reproduction and spread the nematode.


The survival stage is the J3. The red ring nematode and its vectors.

Guard baskets are made of 2-cm-mesh wire. 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 birsaphelenchus heavily sclerotized. Nematode parasites of coconut and other palms. Naturally infects coconut and oil palms, can be artificially inoculated into cabbage palm and a few others.

There is some evidence to suggest that nematodes may persist in beetle larvae through molts, but this is unclear. Tail elongate-subcylindrical with a rounded, unstriated terminus, anal body-widths long.

External symptoms can take up to two months to appear. Three months after infection, a new tree can be infected by a vector female emerging from the infector plant.

Chemical and behavioral ecology of palm weevils Curculionidae: Also, Bursaphelenchus cocophilus adults survive best in wet, swampy areas, in clay rather than sandy soil. These nematodes reproduce sexually and have a 10 day life cycle, and can migrate and survive in soil, especially moist areas.

There are no simple means of controlling this nematode and limited and expensive effective measures are available for control of it in living palms. Palm tree affected by red ring disease. Nematodes can be transmitted by putting infected tissue in soil near healthy trees, but nematode survives free in soil only days.

Red ring disease can appear in several species of tropical bjrsaphelenchus, including date, Canary Island date and Cuban royal, but is most common in oil and coconut palms. When the weevil eggs hatch, immature nematodes associate with the larvae and can remain inside them as the weevils undergo metamorphosis.


Pest or symptoms not visible to the cocophiilus eye but usually visible under light microscope.

Bursaphelenchus cocophilus

The red ring nematode has not yet been reported from the continental U. This procedure is especially recommended in the dry season when the weevils are most active in the cool nights. Liceras Zarate L, Recovery of Rhadinaphelenchus cocophilus Cobb, Goodey, from coconut tissues. The heaviest losses due to R. Beetle larvae hatch and tunnel into tissues, pupate, emerge, become infected and spread nematodes.

Back brsaphelenchus Top Distribution: This diseased tree, however, forms a source of inoculum as it becomes chemically attractive to all palm weevils including potential vectors. Griffith R, Koshy PK, As the leaves change color and dry cocophllus, they wilt and die. Dissemination and Infection Back to Top 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.