Studies on the Host Range of Hop Stunt Disease in Japan

Abstract

Most of Japanese commercial hop plants (Humulus lupulus L, cv. Kirin II) are contaminated with either ring and band pattern mosaic like disease or hop latent virus (Inoue, 1971, 1973a and b) and frequently with both of them. In addition, hop stunt disease has been distributed throughout the hop gardens in the northern part of the mainland of Japan.