Trichodorus is a genus of terrestrial root feeding (stubby-root) nematodes in the Trichodoridae family (trichorids), being one of five genera. They are economically important plant parasites and virus vectors.
Taxonomy. Historically, Trichodorus formed the only genus in the Trichodoridae family. Then Trichodorus was split into two genera in 1974 by Siddiqi, Trichodorus and Paratrichodorus.The genus, which is the second largest in the family consists of 34 species. Siddiqi based the separation on the position of the gland nuclei and the type of pharyngo-intestinal junction.There is no direct relationship between the density of Trichodorus and Paratrichodorus and the percentage of infected tubers (Fritzsche et al., 1986).If the nematodes are not viruliferous and if the seed tubers and other plants in the same soil are virus free, then the only disease will be the direct nematode damage to the roots, which can reduce yield.The Genus Trichoderma is one of the most abundant fungi that have been shown to be present in all climatic zones. As such, it can be found in virtually all soils or rotting wood given that they are found in the roots of plants. However, this fungi can also be found on various parts of plants including the leaves, seeds and grains.
Trichomoniasis is defined as a vaginal infection caused by a sexually transmitted parasitic organism. Another name for Trichomoniasis is Trich. Trich is caused by Trichomonas vaginalis, which is a single cell protozoan parasite with a whip-like tail that it uses to propel itself through the vaginal.
Here we touch on the three basic types of trichomes that coat the surface of cannabis flowers: bulbous, capitate-sessile, and capitate-stalked. 1. Bulbous Trichomes. The smallest type of trichome found on cannabis is the bulbous trichome, which measures just 10-30 micrometers in length and is barely visible to the naked eye. Bulbous trichomes.
Species: Trichomonas vaginalis. Phylogenetic Tree. T. vaginalis belongs to the protist super group Excavata. This phylogenetic tree demonstrates evolutionary relationships between parabasalids, like T. vaginalis, and its closely related organisms. Other parabasalids include the genus Trichonympha.
Abstract. Nematodes of the genera Trichodorus and Paratrichodorus range from 0.5 to 1.5 mm long. They are relatively plump and the females have a very short usually blunt tail so that they often look cigarshaped especially when moribund.
In 1761 Roedere, a German physician, gave a report of the exact morphologic description and provided accurate drawings of the parasite. The organism received its taxonomy classification in the 18th C.
T. vulpis is an unsegmented pseudocelomate with a complete digestive tract. They are also dioecious (seperate sexes), posses a hydrostatic skeleton, and grow by molting which are all characteristic of the nematodes or roundworms.
The members of the Trichophyton rubrum complex are the most common agents of dermatomycoses, primarily causing tinea pedis, onychomycosis, tinea corporis, and tinea capitis.Trichophyton megninii Blanchard (), described in 1896, is the oldest identified taxon in the group.In the 1920s and 1930s, the species was common in Western Europe as an etiological agent of tinea barbae.
Trichoderma is a genus of fungi in the family Hypocreaceae, that is present in all soils, where they are the most prevalent culturable fungi. Many species in this genus can be characterized as opportunistic avirulent plant symbionts. This refers to the ability of several Trichoderma species to form mutualistic endophytic relationships with several plant species.
Trichophyton rubrum is a dermatophytic fungus in the phylum Ascomycota. It is an exclusively clonal, anthropophilic saprotroph that colonizes the upper layers of dead skin, and is the most common cause of athlete's foot, fungal infection of nail, jock itch, and ringworm worldwide.
A review of reported associations between Triehodorus and Paratrichodorus species (Nematoda: Trichodoridae) and tobraviruses with a description of laboratory methods for examining virus transmission by trichodorids Derek J. F. BROWN, Antoon T. PLOEG and David J. ROBINSON Scottish Crop Research Institute, Invergowrie, Dundee 002 5DA, Scotland.
Tobacco is cultivated as a rotation with the paddy for a side income (Anon, 1981). However, product and quality of tobacco leaf are quite low due to encountering many problems, including diseases. For Tobacco cultivation, a deep and well drained soil is needed. This is where nematodes problem develop rapidly (Luc, Sikora et al. 2005).
The classification of dermatophytes is based on the formation of conidia and their morphology and is updated with the discovery of. 8 new species (Ajello, 1977, Matsumoto and Ajello, 1987). Each genus comprises many species, the description of these genera is given below: 2.3.1 Microsporum There are about 16 valid species belonging to the genus Microsporum which are associated with the skin.
Systernatics of the Trichodoridae (Nematoda) with keys to their species Wilfrida DECRAEMER Instituut uoor Dierkunde, Rijksuniversifeif, Ledeganckstraat 35, 9000 Gent, Belgium. SUMMARY Keys are given for the identification of species in the Trichodoridae, partly based on the keys of Loof (1975) and Siddiqi (1974). Recent additions are included.
Paratrichodorus and Trichodorus species The Stubby-Root Nematodes. Damage to Corn. Although actual losses are often hard to measure due to Stubby-Root nematodes occurring together with other species, Paratrichodorus is considered a major pest on corn where populations are large.; Biology. Paratrichodorus minor is small (less than 1 mm long) with a curved stylet.