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龙眼鬼帚病是一种分布广,为害重的主要病害.龙眼罹病后树势衰弱,产量和品质下降,一般减产1～2成,重达5成以上。主要病状表现为幼叶呈月牙形,病梢节间缩短,侧枝丛生,病花穗密集成团,花器不发育或发育不良,一般不结果。四十年代初,裘维蕃首次报道此病。五十年代初,李来荣报道本病能通过靠接、种子传染。最近我们的试验结果指出荔枝蝽和龙眼角颊木虱是本病的虫媒。至于病原问题Veraso等早在1972年就报道了通过病叶组织超薄切片在电镜下可见到线状病毒粒体。但未见其电镜照片。此后有些单位未能从病组织内检测到病原。为此,自1986年以来,我们开展了病原研究。
Longan ghost broom disease is a widely distributed, the main diseases for the serious damage.Ward longan illness after the tree weakness, yield and quality decline, the general reduction of 1 to 2 percent, weighing more than 5 percent. The main symptoms of young leaves were crescent-shaped, lessened internodes of disease, collateral tufts, dense clusters of diseased flower spikes, flower undeveloped or dysplasia, the general does not result. The early forties, Qiu Wei Fan first reported the disease. In the early 1950s, Li Lai-rong reported that the disease can be transmitted through the joints and seeds. Recently, our test results indicate that litchi bugs and longhorn psyllids are the insect vectors of this disease. As for the pathogen Veraso et al as early as 1972 reported on the thin section of the diseased leaf tissue can be seen under the electron microscope linear virus mitochondria. But did not see its electron micrographs. After that, some units failed to detect the pathogen from the diseased tissue. To this end, we have conducted pathogen studies since 1986.