Some Properties of a Virus Causing Mosaic Symptom of Amaryllis

บทคัดย่อ

The virus causing mosaic symptom on Amaryllis in Thailand resembles Hippeastrum mosaic virus. The virus is mechanically transmissible to few species of Amaryllidaceae, Chenopodiaceae, and Solanaceae. The virus has a dilution end point between 1:1,000 - 1:10,000, thermal inactivation point between 55 - 60°C and longevity in vitro between 1 - 2 days. It is a flexuous rod virus of 600 - 750 nm in length. Ultrathin sections of infected leaves reveal pinwheel inclusions. This virus in a member of Potyvirus group.