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Lesion Nematode
''Pratylenchus'' is a genus of nematodes known commonly as lesion nematodes.Crow, W. TAmaryllis lesion nematode, ''Pratylenchus hippeastri''.EENY-546. University of Florida IFAS. 2012. They are parasitic on plants and are responsible for root lesion disease on many taxa of host plants in temperate regions around the world. Lesion nematodes are migratory endoparasites that feed and reproduce in the root and move around, unlike the cyst or root-knot nematodes, which may stay in one place. They usually only feed on the cortex of the root.Lesion nematodes. University of Illinois Extension. 1999. Species are distinguished primarily by the of the [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratylenchus Zeae
''Pratylenchus zeae'' is a plant-pathogenic nematode found on potatoes, maize, cereal, tobacco, coffee, blackberry, and found most often on sugarcane. Morphology Female is slender, 0.4–0.55 mm long. Body almost straight when heated. Low and flat lip region. Labial region not offset from the body. Short and strong stylet with well- developed basal knobs. Conical, rounded tail. Esophagus overlaps ventrally. Monovarial, oviduct indistinct, prodelphic and short uterus. Phasmids slightly posterior to mid-tail. Male is extremely rare, not essential for reproduction. Similar to female except for sexual dimorphism. Spicules slender.Castillo, Pablo, Vovlas, Nicola (2007). ''Nematology Monographs and Perspectives'', Volume 6 : ''Pratylenchus'' (Nematoda : Pratylenchidae) : Diagnosis, Biology, Pathogenicity and Management. Brill Academic Publishers. Economic importance Nematode becomes a concern to farmers when the number feeding on the roots exceeds a certain threshold, above ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratylenchus Hexincisus
''Pratylenchus hexincisus'' is a plant pathogenic nematode infecting sunflower The common sunflower (''Helianthus annuus'') is a large annual forb of the genus ''Helianthus'' grown as a crop for its edible oily seeds. Apart from cooking oil production, it is also used as livestock forage (as a meal or a silage plant), as ...s. References hexincisus Plant pathogenic nematodes Sunflower diseases {{plant-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Host (organism)
In biology and medicine, a host is a larger organism that harbours a smaller organism; whether a parasitic, a mutualistic, or a commensalist ''guest'' (symbiont). The guest is typically provided with nourishment and shelter. Examples include animals playing host to parasitic worms (e.g. nematodes), cells harbouring pathogenic (disease-causing) viruses, a bean plant hosting mutualistic (helpful) nitrogen-fixing bacteria. More specifically in botany, a host plant supplies food resources to micropredators, which have an evolutionarily stable relationship with their hosts similar to ectoparasitism. The host range is the collection of hosts that an organism can use as a partner. Symbiosis Symbiosis spans a wide variety of possible relationships between organisms, differing in their permanence and their effects on the two parties. If one of the partners in an association is much larger than the other, it is generally known as the host. In parasitism, the parasite benefits at the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasitism
Parasitism is a Symbiosis, close relationship between species, where one organism, the parasite, lives on or inside another organism, the Host (biology), host, causing it some harm, and is Adaptation, adapted structurally to this way of life. The entomologist E. O. Wilson has characterised parasites as "predators that eat prey in units of less than one". Parasites include single-celled protozoans such as the agents of malaria, sleeping sickness, and amoebic dysentery; animals such as hookworms, lice, mosquitoes, and vampire bats; fungi such as Armillaria mellea, honey fungus and the agents of ringworm; and plants such as mistletoe, dodder, and the Orobanchaceae, broomrapes. There are six major parasitic Behavioral ecology#Evolutionarily stable strategy, strategies of exploitation of animal hosts, namely parasitic castration, directly transmitted parasitism (by contact), wikt:trophic, trophicallytransmitted parasitism (by being eaten), Disease vector, vector-transmitted paras ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratylenchus Vulnus
''Pratylenchus vulnus'' (also known by the common names Walnut meadow nematode and Walnut root-lesion nematode) is a species of plant pathogenic nematode best known for infecting Persian walnut. It is also known to infest potatoes, apricots, peaches and nectarines, holiday cacti, grape A grape is a fruit, botanically a berry, of the deciduous woody vines of the flowering plant genus ''Vitis''. Grapes are a non- climacteric type of fruit, generally occurring in clusters. The cultivation of grapes began perhaps 8,000 years ago, ... and citruses. References External links Nemaplex, University of California - ''Pratylenchus vulnus'' vulnus Plant pathogenic nematodes Grape pest nematodes {{plant-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratylenchus Thornei
Thorne's meadow nematode (Thorne's root-lesion nematode; ''Pratylenchus thornei'') is a plant pathogenic nematode. Hosts Hosts include '' Aegilops geniculata'' (ovate goatgrass) and ''Triticum aestivum'' ( cultivated wheat). '' Aegilops geniculata'' enjoys moderate resistance to this nematode. ''Ae. geniculata'' is thus used as a wild source of resistance for introgression Introgression, also known as introgressive hybridization, in genetics is the transfer of genetic material from one species into the gene pool of another by the repeated backcrossing of an interspecific hybrid with one of its parent species. Intr ... into cultivated wheat. References External links ''Pratylenchus thornei'' Nemaplex, University of California thornei Plant pathogenic nematodes Nematodes described in 1953 {{plant-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratylenchus Scribneri
''Pratylenchus scribneri'' is a plant pathogenic nematode. It is one of the major plant-parasitic nematodes infecting potato The potato is a starchy food, a tuber of the plant ''Solanum tuberosum'' and is a root vegetable native to the Americas. The plant is a perennial in the nightshade family Solanaceae. Wild potato species can be found from the southern Unit ...es. References External links Nemaplex, University of California - Pratylenchus scribneri scribneri Plant pathogenic nematodes {{plant-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratylenchus Pratensis
''Pratylenchus pratensis'' is a plant pathogenic nematode. References External links Nemaplex, University of California - Pratylenchus pratensis pratensis Plant pathogenic nematodes {{plant-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratylenchus Penetrans
''Pratylenchus penetrans'' is a species of nematode in the genus ''Pratylenchus'', the lesion nematodes. It occurs in temperate regions worldwide, regions between the subtropics and the polar circles. It is an animal that inhabits the roots of a wide variety of plants and results in necrotic lesions on the roots. Symptoms of ''P. penetrans'' make it hard to distinguish from other plant pathogens; only an assay of soil can conclusively diagnose a nematode problem in the field. ''P. penetrans'' is physically very similar to other nematode species, but is characterized by its highly distinctive mouthpiece. ''P. penetrans'' uses its highly modified mouth organs to rupture the outer surface of subterranean plant root structures. It will then enter into the root interior and feed on the plant tissue inside. ''P. penetrans'' is considered to be a crop parasite and farmers will often treat their soil with various pesticides in an attempt to eliminate the damage caused by an infestatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratylenchus Neglectus
''Pratylenchus neglectus'' is a plant-pathogenic nematode infecting potato, alfalfa and mint. References External links ''Pratylenchus neglectus''.Nemaplex. University of California, Davis. neglectus Plant pathogenic nematodes Potato diseases Nematodes described in 1941 {{plant-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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