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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A description of Bursaphelenchus okinawaensis sp. The color change usually begins at the tip of each leaf and starts in the older leaves before moving to the younger ones.

O ‘anel vermelho’ do coqueiro bursalhelenchus a fumigacao do solo com D-D. The few that do recover often undergo a recurrence of the disease in later years. Bursaphelenchus cocophilus causes red ring disease of palms.

This nematode can be transmitted by putting infected tissue in soil near healthy trees, but nematode survives free in soil only days. Intestine with small granules and indistinct lumen. In Trinidad, red ring disease kills 35 percent of young coconut trees. The disease occurs more commonly in trees 2. By using this site, you agree to the Terms of Use and Privacy Policy. Distribution Table Top of page The distribution in this summary table is based on all the information available.


Nematodes are carried on body surface and also enter body through spiracles and mouth. O anel vermelho do coqueiro, no estado do Ceara.

Texas Invasive Species Institute

The dispersal rate from the primary infector plant depends upon the development of R. Species involved include bark beetlesweevilsflat-faced longhorn beetles such as sawyer beetlesand soil-nesting bees.

Aphelenchida Tree diseases Oil palm Coconut palm diseases. As the leaves change color and dry up, they wilt and die. The survival stage is the J3. The following modification was devised by Schuilling and Van Dinther The most characteristic symptoms are the internal lesions.

They are cylindrical, 1 m high and 0. Palms that are already infected and dying from red-ring disease give off a chemical that attracts even cocophiluw weevils Giblin-Davis et al.

Rhadinaphelenchus cocophilus (red ring nematode)

Many trees show yellowing and browning of leaves buesaphelenchus may not be due to R. Nematodes are numerous in and around the discolored tissues; adults are usually located at inner edge of red ring. Cocophilsu causes reduction in water uptake by tree.

Rhadinaphelenchus cocophilos Cobb, n. Zeitschrift fur Angewandte Entomologie, Two important cases of nematode infestation in Surinam.


Chemical and behavioral ecology of palm weevils Curculionidae: As ofthere are about 70 [2] to 90 [3] species in the genus. The heaviest concentration of nematodes can be found within a foot of the highest part of the internal red ring that is a classic symptom of red ring disease; as many as 50, have been found in 10 grams of cocohilus stem tissue Esser There is apparently a phytotoxin in the red ring.

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. Of bursapheoenchus females he examined, one possibly possessed a vulval flap. These symptoms differ somewhat in the dwarf variety ‘nana’ and also some panama talls.

The role of the palm weevil, Rhynchophorus palmarumas a vector of red ring disease of coconuts. Insecticides can reduce palm weevil infestations. Economic Importance Back to Top In Trinidad, red ring disease kills 35 percent of young coconut trees.