我省是华南主要柑桔产区之一,也是黄龙病的一大病区,过去主要在闽南和闽江下游两岸的闽侯县和福州市郊蔓延为害.1958年以后闽北柑桔生产发展迅速,也带来黄龙病的为害,但人们对此认识不一致.同时,传播黄龙病的媒介昆虫柑桔木虱在闽北的分布情况,以前未见报道.因此,我们在闽北一些柑桔园和柑桔苗圃进行了调查.现将结果报告以下.一、调查及分级方法对木虱的调查;柑桔园面积小于5亩的,随机观察50个嫩梢.大于5亩的每隔5～10行观察10～20个嫩梢,共观察100～200个嫩梢.成年柑桔树观察中下部徒长梢及老叶背面.寻找木虱成虫、若虫及卵.严 My province is one of the major citrus producing areas in southern China, but also a major ward of the Huanglong disease, in the past mainly in Minhou County and Fuzhou suburbs of Minnan and Minjiang River downstream of the spread .1958 after the rapid development of citrus production in northern Fujian, But also bring the damage of the Huanglong disease, but people do not know this inconsistency.At the same time, the distribution of yellow insecticide citrus psylla insect distribution in northern Fujian has not been reported.So, we in some northern Fujian citrus and Citrus nurseries were investigated. The results are reported below .A survey and grading methods on the investigation of psyllid; citrus orchard area is less than 5 acres, 50 randomly observed shoots. More than 5 acres every 5 to 10 Observed 10 to 20 young shoots were observed 100 to 200 young shoots. Adult citrus trees observed in the lower part of the long and the back of the old leaves looking for adults, nymphs and eggs nymphal