Transmission of Mulberry Ringspot Virus by Longidorus martini Merny

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

Longidorus elongatus (de Man) was always found in soil from patches in raspberry and strawberry plantations where the plants were infected with the beet ringspot (Scottish) strain of tomato black ring virus but rarely elsewhere in the same plantations. L. elongatus hand-picked from virus-containing field soil transmitted the virus to sugar beet, turnip, and spinach seedlings, but did so less of...

Ingestion, retention, and transmission of two strains of raspberry ring-spot virus by Longidorus macrosoma.

The transmission of two strains of raspberry ringspot virus (RRV) by small numbers of nematodes was compared. A strain of RRV from Scotland (RRV-S), originally found in the field associated with Longidorus elongatus, was transmitted frequently by L. elongatus but only once by L. macrosoma. A strain from England (RRV-E) associated with L. macrosoma in the field was transmitted infrequently by ea...

Transmission of johnsongrass chlorotic stripe mosaic virus by embryo injection

Vertical transmission of Prunus necrotic ringspot virus: hitch-hiking from gametes to seedling.

The aim of this work was to follow Prunus necrotic ringspot virus (PNRSV) infection in apricot reproductive tissues and transmission of the virus to the next generation. For this, an analysis of viral distribution in apricot reproductive organs was carried out at different developmental stages. PNRSV was detected in reproductive tissues during gametogenesis. The virus was always present in the ...

A Virus Disease of Watermelon in Wisconsin Incited by the Tobacco Ringspot Virus'

In August 1946, marked viruslike symptoms were observed on watermelon {Citrullus vulgaris Schrad.) and muskmelon (Cucumis melo L.) plants in a field at Merrimac, Wis. Inoculations from infected plants to tobacco (Nicotiana tabacum L.), cucumber (Cucumis sativus i.)> ö.nd watermelon demonstrated that the disease was of virus origin. Isolates from watermelon and muskmelon were identical, and one ...