前言在日本,随着果品消费量的增长,果树栽培面积也在扩大。由于消费者对果品爱好的多样化,果树栽培者频繁地进行着新品种的更换或引进。因此30年前还不成为问题的病毒病害,目前竟是果树栽培的重大障害。同时,由于病毒领域研究的进步,过去某些原因不明的问题,现已明确是病毒病。草木植物上的病毒病,其病原病毒主要以昆虫为媒介进行传染。所以草本植物的病毒病和果树病 Preface In Japan, fruit tree cultivation is also expanding as fruit consumption increases. As consumers diversify their hobbies, fruit growers frequently change or introduce new varieties. Therefore, the virus disease that has not become a problem 30 years ago is now a major obstacle in the cultivation of fruit trees. At the same time, due to the progress made in the field of viruses, some unknown causes in the past have now been clearly virus diseases. Viruses on plants and plants, the virus mainly to insects as the vector for infection. So the herbaceous virus disease and fruit tree disease