The location of raspberry ringspot and tomato black ring viruses in the nematode vector, Longidorus elongatus (de Man)

1969 ◽  
Vol 64 (2) ◽  
pp. 233-237 ◽  
Author(s):  
C. E. TAYLOR ◽  
W. M. ROBERTSON
Keyword(s):  
Black Ring ◽  
De Man ◽  
Longidorus Elongatus

Transmission of a strain of tomato black ring virus by Longidorus elongatus (Nematoda)

Virology ◽  
1961 ◽  
Vol 14 (4) ◽  
pp. 480-485 ◽  
Author(s):  
B.D. Harrison ◽  
W.P. Mowat ◽  
C.E. Taylor
Keyword(s):  
Black Ring ◽  
Tomato Black Ring Virus ◽  
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.

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.

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