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柑桔木虱是柑桔黄龙病主要媒介昆虫。几年来的试验初步表明:无病植株上繁殖木虱成虫,在病树上吸毒20—30天以上就可传病。黄龙病病原在成虫体内约经20—30天循回期、带毒后木虱成虫,虫口密度大(20头/苗以上),吸食传毒1天即可发病;虫口密度小(1—5头/苗),吸食传毒7—14天也能传病。潜伏期一般2—8个月,个别株2年才发病,病梢于冬季回接,3—5个月后也表现出和虫传发病苗相同的斑驳状病症。
Citrus psyllid is the major medium insect of citrus yellow dragon. Over the past few years the trial showed that: adult plant propagation of psylla adults, in the diseased tree 20-30 days can be more than drug-borne disease. Huanglongbing pathogen in the body about 20-30 days after the return period, with poisonous wood louse adults, insect population density (20 / seedlings above), one day after taking poisoning can be transmitted; insect population density (1-5 Head / seedlings), taking poisoning 7-14 days can also be transmitted. The incubation period is generally 2-8 months, individual strains of 2 years before onset, the disease shoots back in winter, 3-5 months later also showed the same mottled worm disease and mottling-like disease.