Transmission of raspberry ringspot virus by Longidorus elongatus (de Man) (Nematoda: Dorylaimidae)

Virology ◽  
1962 ◽  
Vol 17 (3) ◽  
pp. 493-494 ◽  
Author(s):  
C.E. Taylor
Keyword(s):  
Ringspot Virus ◽  
De Man ◽  
Longidorus Elongatus

DAMAGE TO FLUE-CURED TOBACCO BY THE NEEDLE NEMATODE LONGIDORUS ELONGATUS

1973 ◽  
Vol 53 (3) ◽  
pp. 689-692 ◽  
Author(s):  
C. F. MARKS ◽  
J. M. ELLIOT
Keyword(s):  
Zea Mays L ◽  
Sweet Corn ◽  
Triticum Aestivum L ◽  
Control Measures ◽  
Severe Stunting ◽  
Nicotiana Tabacum L ◽  
Secale Cereale L ◽  
De Man ◽  
Longidorus Elongatus ◽  
Specific Control

The ectoparasitic nematode (Longidorus elongatus (de Man 1876) Thorne and Swanger 1936) was associated with severe stunting of flue-cured tobacco (Nicotiana tabacum L.) at Delhi, Ontario in early June 1971. Foliar applications of the nematicide Vydate ((S-methylcarbamoyl)-N-[(methylcarbamoyl oxy)] thioformimidate) to the stunted plants reduced the number of L. elongatus in the soil around the roots but did not improve plant growth. A pot test in a greenhouse indicated that flue-cured tobacco, rye (Secale cereale L.), and winter wheat (Triticum aestivum L.) were poor hosts for the nematode whereas sweet corn (Zea mays L.) and sorghum (Sorghum vulgare Pers.) were good hosts. Apparently, in the field the small numbers of L. elongatus that had been subsisting in the soil had multiplied to damaging levels on a crop of sorghum grown in the previous year. Because of the rare occurrence of Longidorus spp. in soils of the tobacco-growing areas of Ontario and the crop rotation and soil fumigation in use by most growers of flue-cured tobacco, it is unlikely that any specific control measures will be required to prevent damage to tobacco by L. elongatus.

Prevalence of viral diseases and isolation of candidates in nuclear stock plants of raspberry ex situ

2020 ◽  
Vol 61 ◽  
pp. 109-116
Author(s):  
M. T. Upadyshev ◽  
K. V. Metlitskaya ◽  
S. N. Evdokimenko ◽  
T. A. Tumaeva ◽  
A. A. Borisova ◽  
...  
Keyword(s):  
Species Composition ◽  
Ringspot Virus ◽  
Ex Situ ◽  
Viral Diseases ◽  
Serological Tests ◽  
Arabis Mosaic Virus ◽  
Planting Material ◽  
Total Prevalence ◽  
Virus Rna ◽  
Longidorus Elongatus

On raspberries, currently about 30 viral diseases are known in the world that can reduce the yield and its quality. According to the results of previous studies in the Moscow region, the prevalence of viruses on raspberries was: Arabis mosaic virus(ArMV) – 14 %, Raspberry ringspot virus(RpRSV) – 30 %, Strawberry latent ringspot virus(SLRSV) – 16 %, Tomato black ring virus (TBRV ) – 18 %, Raspberry bushy dwarf virus (RBDV) – 39 %. Viruses spread in agrocenosis with infected planting material, with tools, with pollen and seeds, nematodes – longidorids (Xiphinema diversicaudatum – ArMV and SLRSVvector, Longidorus elongatus – RpRSV and TBRVvector). The harmfulness of viruses on raspberry plants consisted inreducingthe productivity by 21 %, fruit masse– by 26 % compared with virus-free plants. The aim of the study was to study the species composition of viruses on raspberries to identify candidates for the nuclear stock plants. In serological tests, the ELISA sandwich version was used according, for analysis, diagnostic kits from Loewe (Germany) were used. Leaves were taken as samples. The results of analyzes were recorded on a Stat Fax 2100 hotometer at a wavelength of 405 and 630 nm. RBDV virus RNA was isolated using the CytoSorb kit, followed by RT-PCR. The species composition of viruses on raspberry varieties was studied under ex situ conditions. The total prevalence of viruses was 29 % with the predominance of the RBDV virus (19 %). 102 candidates for nuclearstockplants of 22 varieties of raspberries were identified. After confirming the virus-free status of raspberry plants by PCR, they will receive the category “nuclearstock plant”.

THE FEMALE REPRODUCTIVE SYSTEM OF LONGIDORUS ELONGATUS (DE MAN, 1876) THORNE AND SWANGER, 1936 (NEMATODA: LONGIDORINAE), WITH A NOTE ON THE GENERA LONGIDORUS (MICOLETZKY, 1922) THORNE AND SWANGER, 1936, AND XIPHINEMA COBB, 1913

1961 ◽  
Vol 39 (4) ◽  
pp. 413-418 ◽  
Author(s):  
T. D. Williams
Keyword(s):  
Reproductive System ◽  
Gravid Female ◽  
Young Female ◽  
Female Reproductive System ◽  
Reproductive Systems ◽  
Gravid Females ◽  
De Man ◽  
Longidorus Elongatus

The female reproductive system of Longidorus elongatus (de Man, 1876) Thorne and Swanger, 1936, is described in detail from a. number of gravid females. This description is compared with the results of dissections, in saline, of the reproductive systems of young female worms and one other gravid female. The significance of a sac-like structure found at the junction of the ovary and oviduct is discussed. Certain similarities in the female reproductive systems of some species of Longidorus and Xiphinema are described, and it is suggested that further studies of these systems might assist in the clarification of certain taxonomic problems in these genera.

Longidorus elongatus. [Distribution map].

2002 ◽  
Author(s):  
Keyword(s):  
Tamil Nadu ◽  
Western Siberia ◽  
Uttar Pradesh ◽  
Distribution Map ◽  
Central Russia ◽  
Southern Russia ◽  
De Man ◽  
Longidorus Elongatus ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Longidorus elongatus (de Man) Micoletzky Nematoda: Longidoridae Polyphagous. Information is given on the geographical distribution in EUROPE, Austria, Belgium, Bulgaria, Czech Republic, Denmark, Estonia, Finland, France, Germany, Hungary, Ireland, Italy, Latvia, Moldova, Netherlands, Norway, Poland, Romania, Central Russia Russia, Southern Russia, Western Siberia, Slovakia, Spain, Sweden, Switzerland, UK, Ukraine, ASIA, India, Tamil Nadu, Uttar Pradesh, Kazakhstan, Pakistan, Tajikistan, Uzbekistan, Vietnam, AFRICA, South Africa, NORTH AMERICA, Canada, British Columbia, Ontario, USA, Arkansas, Oregon, OCEANIA, New Zealand.

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