盐酸四环素等药物对柑桔黄龙病治疗效应

试验用六种抗菌素及二种化学药物加压灌注黄龙病树,结果表明:四环素、土霉素效果较好,金霉素、青霉素及磺胺嘧啶亦有一定抑制病情的作用,链霉素、氯霉素、对氨基苯甲酸效果不明显。对柑桔黄龙病病株灌注盐酸四环素八天后,斑驳病叶中的淀粉积累现象逐步消失。新梢生长、花芽发育均正常,落果现象明显减少。果实大小、品质均与健树无明显差异。对主干中段的直径为11.5～15厘米的刚发病11龄甜橙树,注入每毫升合1000单位的盐酸四环素溶液5000～8500毫升。注药后彻底剪除病枝。杩势恢复后三年不出现症状。使用量偏低的病株、症状短期内受到抑制,但以后会再度出现。

CONTROL OF YELLOW SHOOT DISEASE OF CITRUS BY TRUNK INJECTION OF TETRAGYCLINE HYDROCHLORIDE AND SOME ORTHER MEDICINES

The trees of sweet orange on sunki stock infected by yellow shoot disease were injected with achromycin, terramycin, aureomycin, penicillin, chloromycetin, streptomycin, sulfadiazine or p-aminobenzoic acid in various concentrations.Achromycin is most effective to suppress the symptoms of this disease. A dosage of 5000-8500 ml in 1000 ppm of achromycin was used for the 11 years old orange trees with trunk diameter between 11.5~15cm. Trees which have been injected bear normal fruits and produce healthy shoots for three years. The accumulation of starch in the infected leaves disappeared within eight days after injection.The symptoms could also be suppressed by terramycin, aureomycin, penicillin and most of the shoots could grow normally by the application of sulfadiazine. No remarkable response to streptomycin, chloromycin and p-aminobenzoic acid has been observed.