Browsing by Author "Whitehead, A.G."
Now showing 1 - 4 of 4
- Results Per Page
- Sort Options
Item Nothanguina Cecidoplastes N. Comb. Syn. Anguina Cecidoplastes (Goodey, 1934) Filipjev 1936 (Nothotylenchinae: Tylenchida)(1959) Whitehead, A.G.Venkatarayan described galls on the leaves, stems and flowers of Bothriochloa pertusa (Willd.) A. Camus, syn. Andropogon pertusus Willd. GOODEY (1934) described the nematodes inhabiting these galls and assigned them to a new species of the genus Anguillulina Gervais & van Beneden, 1859. Subsequently the genus Anguillulina was split by Filipjev into a number of clearly distinct genera and A. cecidoplastes was placed in the genus Anguina Scopoli, 1777. In reviewing the descriptions of Anguina spp., the author noticed that A. cecidoplastes differed from all other Anguina spp., in the absence of a median oesophageal bulb. Filipjev & Schuurmans Stekhoven also pointed out that this character was shared with Iotonchium Cobb 1920, although in other respects the two genera were quite distinct. Thorne erected a new family Neotylenchidae to receive those genera, lacking a median oesophageal bulb. The author now proposes that the nematode Anguina cecidoplastes Filipjev 1936 be placed in this family and erects a new genus -Nothanguina (sub-family Nothotylenchinae Thorne, 1941) to receive it. This new name indicates the relationships of the nematode, i.e. on strict morphological grounds with Nothotylenchinae, though retaining many features of secondary taxonomic importance shared with Anguina spp.Item The Root-Knot Nematodes of East Africa Meloidogyne Africana N. SP., A Parasite of Arabica Coffee (Coffea Arabica L.)(1959) Whitehead, A.G.; East African Agriculture and Forestry Research Organisation, Kenya, AfricaRoot-knot nematodes (species of Meloidogyne Goeldi, 1887 (emend. Allen, 1952) frequently attack arabica coffee in the mountain areas of East Africa. Coffee nurseries are widely attacked in the Meru District of Kenya by a new species Meloidogyne Africana n.sp. A species with a very similar anal plate pattern in the female also attacks arabica coffee on Mt. Kilimanjaro, Tanganyika. Galls due to the invasion of the roots by this species are usually small, from 1 to 5 mm in diameter. Affected seedlings are generally stunted and chlorotic, while feeder roots and often main roots also, are 'blinded', resulting in the formation of numerous branch rootlets behind the affected root-tip. Heavy attacks in mature coffee trees by Meloidogyne spp. are generally associated with unthriftiness.Item Scutellonema Clathricaudatum N. Sp. (Hoplolaiminae: Tylenchida), A Suspected Ectoparasite of the Roots of the Cotton Plant(1959) Whitehead, A.G.; East African Agriculture and Forestry Research OrganizationTwo samples of soil from around the roots of cotton, Gossypium hirsutum L. var. UK 5I, collected from a site in Tanganyika which had been planted to cotton for fifteen consecutive years, contained 5000 and IOOO specimens respectively, per liter of soil, of a new species of Scutellonema Andrassy I958. This species is believed to be an ectoparasite of cotton roots, but its pathogenicity is unknown.Item Trichotylenchus Falciformis N.G., N.SP. (Belonolaiminae N. Subfam.: Tylenchida Thorne, I949) An Associate of Grass Roots (Hyparrhenia Sp.) in Southern Tanganyika(1959) Whitehead, A.G.; East African Agriculture and Forestry Research Organisation, Kenya, AfricaTrichotylenchus falciformis n.g. n.sp. is described, figured and put into the new subfamily Belonolaiminae. The spear base is split slightly, each arm bearing a rounded, basal knob. The head is cap-like with four lips, each with about four annules. The tail in both sexes is about six anal-body-widths long with the phasmids behind the mid-point of the tail. The lateral fields have three incisuresv the posterior part of the oesophagus overlaps the intestine as a glandular lobe. The ovaries are paired, outstretched and opposed; spermathecae are present; the vulva is median. The nematode occurred around roots of the grass Hyparrhenia sp. in Tanganyika. Belonolaimus is designated type genus of Belonolaiminae which is defined. J. B. Goodey.
