柚矮化病病原嫁接接种8个柚类品种的盆栽苗，有7个品种的苗木发病，而强德勒枝叶生长无明显异状，无木质部陷点（仅有个别枝条有零星木质都陷点）。强德勒嫁接于已感病植株，不显病状。用4个地点采集的柚矮化病病原嫁接接种强德勒，均不显病状。试验结果初步说明，强德勒对柚矮化病具有高度抗（耐）病性。 There were 7 varieties of seedlings inoculated with pomelo dwarf disease pathogen grafted in potted seedlings, while there was no obvious heterosis in the growth of foliage and no deltas in the leaves of the phytoncide (no woody traps were observed in some branches) ). Roger Federer grafted plants have been infected, no significant symptoms. Grapefruit dwarf disease pathogen collected in 4 locations were inoculated with phytoncide, and no obvious symptoms were observed. The preliminary results of the test indicated that the grapevine has strong resistance (resistance) to the grapefruit disease.