Abstract
The causal virus of the seed-borne mosaic disease of adzuki-bean (AzMV) is infectious only to leguminous plants. Among 30 species of Leguminosae, Phaseolus angularis alone shows mosaic, and Astragalus sinicus shows vein-clearing. Canavalia ensiformis, C. gladiata, Phaseolus lunatus, Vigna sesquipedalis and V. sinensis seems to be symptomless carriers. Phaseolus vulgaris var. Master Piece shows symptomless local infection.
Thermal inactivation point of the virus lies between 55 and 60°C, and its longevity in vitro is f und to be between 0 and 24 hours at 20°C. Dilution end point lies between 1:100 and 1:1, 000.
All the isolates of viruses obtained through seeds of adzuki-bean caused mosaic symptoms on adzuki-bean, but not on asparagus-bean, so far as the present tests concerned.
The results of cross immunity tests indicated that the plants infected with Adzuki-bean Mosaic Virus protected the infection of Asparagus-bean Mosaic Virus (ApMV). Consequently the virus is considered to be a strain of Asparagus-bean Mosaic Virus.
