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病株经土霉素处理后,以浸根法易被植株吸收,并迅速地运转到植株各部位,4～5天内达到高峰期。土霉素被植株吸收后,在植株体内保存期20天以上。而且能被叶蝉吸收,在叶蝉体内达到高峰期一般需要7～8天。土霉素在叶蝉体内保存期约7天左右。土霉素被植株吸收后,随着植株体内抗生素量的增多或减少,直接或间接地影响叶蝉的传病能力。土霉素被叶蝉吸收后,随着其吸收量的多寡,直接影响叶蝉本身的传病能力。对室外大树病株或室内的幼苗病株,用土霉素抑制苦袜簇顶病的效果是较明显的。在防治上,用皮层切割法比钻孔法效果好。药量以每株1～2克效果较好,有效期超过10个月以上。室内幼苗病株防治试验效果说明,用抗生素(卡那霉素和土霉素)直接喷射、浸根或土壤处理植株(包括皮层切割)都有一定的疗效。叶面喷射效果较差,叶面喷射和土壤灌注混合处理及浸根效果稍好一些,皮层切割较好,作用的时间相对较长些。苦楝病株与带病叶蝉经土霉素处理后的超薄切片在电镜观察下,类菌原体有明显的变化,其变化步骤可能是:最初类菌原体细胞内形成较粗的无规则的丝绳状物结构,而后类苗原体细胞收缩及变形,最后胞内呈中空现象,整个细胞溶解。
After being treated by oxytetracycline, the diseased plants are easily absorbed by the plants by the immersion root method and quickly run to all parts of the plant, reaching the peak within 4 to 5 days. Oxytetracycline absorbed by plants, the preservation of plants in the body more than 20 days. And can be absorbed by leafhoppers, the peak in leafhopper body usually takes 7 to 8 days. Oxytetracycline in the leafhopper in vivo preservation period of about 7 days. Oxytetracycline absorbed by plants, with the increase or decrease in the amount of antibiotics in plants, directly or indirectly affect leafhopper’s ability to transmit disease. Oxytetracycline is absorbed by leafhoppers, with the amount of its absorption, a direct impact on leafhopper’s ability to transmit disease. The effect of oxytetracycline on biting socks top disease is more obvious on outdoor tree strains or indoor seedling disease strains. In the prevention and treatment, the use of cortical cutting method is better than drilling method. Dosage of 1 to 2 grams per plant is better, valid for more than 10 months. The results of the prevention and control test of the inoculated seedling plants showed that the direct spraying with antibiotics (kanamycin and oxytetracycline), root immersion or soil treatment plants (including cortical cutting) have a certain curative effect. Foliar spray less effective, foliar spray and soil perfusion mixed treatment and root immersion slightly better results, better cortical cutting, the role of time is relatively longer. Meloidogyne strain and diseased leafhopper after oxytetracycline treatment of ultra-thin sections under electron microscope observation, the obvious changes in the mycoplasma, the steps may change: the initial mycoplasma in the formation of coarse cells Rules of the structure of the wire rope, and then the seedlings of somatic cell contraction and deformation, the last was hollow intracellular phenomenon, the entire cell lysis.