1981～1985年,在研究柑桔黄龙病病原的草本植物寄主范围时,用草地菟丝子(Cuscutacompestris)成功地将黄龙病病原从感病柑桔传到长春花(Catharanthus roseus),并证明病原在长春花筛管细胞内大量繁殖。但是,将感病长春花上病原回接柑桔时,没有成功。为此,从1985年2月到1987年6月做了大量的回接工作,以求突破。同样以草地菟丝子为桥 From 1981 to 1985, when studying the herb host range of citrus Huanglongbing pathogen, the pathogen Huanglonglong was successfully transferred from susceptible citrus to Catharanthus roseus with the grass Cuscutacompestris and the pathogen was found in Changchun Flower sieve cells multiply. However, the disease Vinca flower pathogen back to citrus, did not succeed. To this end, from February 1985 to June 1987 done a lot of back to work in order to achieve a breakthrough. The same grass dodder for the bridge