随着四川柚类栽培面积和产量不断增加,生产迅猛发展,柑桔衰退病在部份良种名柚表现愈来愈明显.有些品种、品系的发病程度已相当严重,极大地影响了柚类生产与果农的经济收入,是四川柚类生产中急待解决的关键问题之一. With the growing area and production of pomelo cultivation in Sichuan, the rapid development of production, citrus recession in some of the better varieties of grapefruit performance more obvious.Some varieties, the incidence of the strain has been quite serious, greatly affected the pomelo production And the economic income of farmers, pomelo production in Sichuan is one of the key issues to be solved.