Carnation latent virus. [Distribution map].

A new distribution map is provided for Carnation latent virus. Flexiviridae: Carlavirus. Hosts: carnation (Dianthus caryophyllus) and sweet william (D. barbatus). Information is given on the geographical distribution in Europe (France, Germany, Lithuania, Spain, Ukraine, and England and Wales, UK), Asia (Himachal Pradesh, India; Honshu, Japan; and Korea Republic), North America (British Columbia, Canada, and Colorado and New York, USA), South America (Argentina and Venezuela) and Oceania (Victoria, Australia).

The use of a sequential batch testing procedure and ELISA to determine the incidence of five viruses in Victorian cut-flower Sim carnations

A sequential batch testing procedure was used in conjunction with ELISA to estimate levels of virus incidence in Victorian cut-flower 'Sim' carnations. The industry was surveyed for five viruses, namely; carnation mottle virus (CarMV), carnation etched ring virus (CERV), carnation vein mottle virus (CarVMV), carnation latent virus (CarLV) and carnation ringspot virus (CarRSV). CarMV was the most prevalent virus (9.9%), and lower levels of CERV (0 2%), CarVMV (0.1%) and CarLV (0.1%) were detected. CarRSV was not detected in any of the samples tested. Levels of CarMV were lower than in a previous survey in 1985, suggesting that the Plant Improvement Program which has been in operation in Victoria has been instrumental in reducing the incidence of this virus. Growers who purchased cuttings from specialist propagators had lower levels of virus than propagators who implemented little or no quality control. Growers who introduced pathogen-tested cuttings at regular intervals also had lower levels of virus infection.

Der Einfluß von Agar- und Elektrolytkonzentration auf die Immunodiffusion von Tabakmosaik- und carnation latent Virus

The position (p) of precipitin bands in OUCHTERLONY’S test with tobacco mosaic virus and carnation latent virus depends upon the concentration of agar and electrolyte. This dependence results from the greater diffusional restriction of antigen in comparison to that of antibody. It is suggested that the effect of electrolyte concentration on the antigen in gel is mechanistically the same as the interaction between virus and agar in the sol state. Antisera against seven distantly related viruses of the potato virus S group reacted with carnation latent, potato M, and red clover vein mosaic viruses. This further demonstrates a serological relationship between viruses of the same shape but different normal length.