Spiral nematodes of the genus Helicotylenchus are among the most ubiquitous With the exception of Helicotylenchus multicinctus, spiral nematodes are not. The damage symptoms are similar to those caused by other serious root endoparasites of the family Pratylenchidae, both on banana plants and plantains. The life cycle and mating behavior of Helicotylenchus multicinctus (Nematoda: Hoplolaimidae) were observed in vitro on excised roots of Musa cavendishii in.
|Published (Last):||28 May 2013|
|PDF File Size:||18.13 Mb|
|ePub File Size:||8.77 Mb|
|Price:||Free* [*Free Regsitration Required]|
Reported median body size for this species Length mm; width micrometers – Click: The nematode attacks the outer cortical part of the root causing characteristic necrotic lesions, which are at first yellow in colour and then turn reddish-brown to black. Articles from Journal of Nematology are provided multicinctis courtesy of Society of Nematologists.
Economic Importance Back to Top While Helicotylenchus pseudorobustus is a parasite of many economically important plants, it is seldom considered a major pest on most of them. Rarely, in heavy infestations, the root lesions can coalesce and the necrosis becomes extensive, causing distortion followed by decay of the root.
The cells in the vicinity of the nematode head had distorted and ruptured walls, contracted cytoplasm, and enlarged nuclei. However, often their damage has not been well quantified or documented. Embryonic patterns and parasitic habits of Helicotylenchus oleae and H. Second stage juveniles possess a digitate multicnctus. These are called spiral nematodes because their bodies tend to curl into a spiral when the nematodes are relaxed or dead Figure 1.
Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report. Seedborne Aspects Top of page There is no evidence that H. Description Top of page Adult Females Body of heat-killed specimens arcuate multicincus C-shaped; annules distinct, lateral field with four incisures, not areolated.
Support Center Support Center. Nematologia Mediterranea, 23 2: After hatching, the second-stage juvenile must locate a host plant and begin feeding for further development.
The Cretan population of H. Modelling pest dynamics of new crop cultivars: Detection and Inspection Top of multicnictus Because of the endoparasitic habits of the species, populations of H. Krusberg LR; Hirschman H, Pest or symptoms not visible to the naked eye but usually visible under light microscope.
Genital apparatus composed of two symmetrical ovaries; sometimes the posterior ovary may appear reduced, but is still functional.
Abstract Plant-parasitic nematodes such as Longidorus helicotylehchus and Helicotylenchus multicintctus are species helicotylennchus distributed in central Europe as well as in Mediterranean area. Rarely, in heavy infestations, the root lesions can coalesce and the necrosis becomes extensive, causing distortion followed by decay of the root.
Groups of eggs were observed in discolored cortical tissues; hours were needed for the newly laid eggs to hatch in tapwater at 30 C, and the first molt helicotyoenchus believed to take place outside the eggs shortly after hatching.
The multicjnctus can survive 4 months without host plants, but is less resistant to desiccation than H. On turfgrasses, Helicotylenchus paxilli has been shown to reduce root length and cause thinning of turf.
Study of field populations of H. Vulva is a depressed transverse slit on ventral side of the body. This food cell is not larger than a typical cortical cell, but has denser cytoplasm and larger nucleus than a normal cell. Their data are the most reliable because the spiral nematode occurred in the absence of Radopholus similis and Pratylenchus coffeae, the other two major pests of banana.
Refer to Nematode Management for Golf Courses in Florida for current management recommendations on golf course turf. Distribution of stylet-bearing nematodes in the Northeastern United States. A Longidorus species was found at a density of 1—3 specimens umlticinctus cm 3 of soil. Journal of Plant Protection in the Tropics, 1: Close Find out more.
Caudal alae crenate, enveloping tail but not protruding beyond it in multiccinctus view. Biology and Ecology Top of page According to the reports of Minz et al. Gowen S; Queneherve P, Intestine not overlapping rectum. World-wide on banana; all banana plantations in Israel are said to be infested. A healthy plantation may remain productive for up to 20 years; an infested one for only 2 or 3 years.
Find articles by Multicinchus A. Refer to Helicotylenchus for morphological description. In Florida, seashore paspalum, a turfgrass used in tropical and subtropical regions, is particularly susceptible to infestation by Helicotylenchus paxilli. Helicotylenchus species as crop damaging parasitic nematodes. When several references are cited, they may give conflicting information on the status. Dorylaimida associated with spindle trees infected with euonymus mosaic virus in Czechoslovakia.
Helicotylenchus multicinctus (banana spiral nematode)
Heavy infestations may cause root necrosis. The common name spiral nematode is most often applied to nematodes in the genus Helicotylenchusmulticinctua it is also sometimes applied to other genera in the family Hoplolaimidae, including RotylenchusKulticinctusScutellonemaand Peltamigratus.
Israel Journal of Agricultural Research. De Guiran G; Vilardebo A, Responses of seashore paspalum cultivars to sting and spiral nematodes. Longidoridae from Russia and other countries using rRNA genes.
Helicotylenchus paxilli has been demonstrated to reduce growth of bermudagrass and seashore paspalum used on Florida golf courses Pang et al.