Viruslike particles associated with ringfleck mosaic of mountain ash and a mosaic disease of raspberry in the Bavarian Forest

Abstract
Two types of spherical viruslike particles measuring ca. 25–30 nm and 80 nm in diameter, respec‐tively, were found both in ringfleck mosaic affected mountain ash and adjacent raspberry bushes in the Bavarian Forest. The smaller particles were also found in symptomless mountain ash in the same forest. The sap from infected mountain ash reacted with an antiserum to tomato spotted wilt virus in agar‐gel‐diffusion test. No reactions were obtained with raspberry or mountain ash sap when tested against antisera to a number of small spherical plant viruses.

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