越南地区柑橘黄龙病发生及防治

黄龙病是全球广泛发生的毁灭性病害,柑橘木虱为其主要媒介昆虫。越南最早于上个世纪六十年代有相关报道。通过一些国际合作项目,越南对柑橘木虱和黄龙病进行了一系列研究并积极采取措施有效防控:包括消除病株、筛选抗病虫品种、改变种植密度和时间、化学防治与生物防治、作物间种、喷施矿物油乳剂、施用有机肥、使用无病苗和无病接穗并在运输过程中封闭保护等。其中控制黑臭蚁Dolichoderus thoracicus增殖黄猄蚁Oecophylla smaragdina、交错式间种番石榴以控制柑橘木虱和黄龙病值得中国借鉴和参考。

Huanglongbing occurrence and management in Vietnam

Huanglongbing(HLB)is a destructive citrus disease in almost the world.In Vietnam,the disease has been reported since early 1960s,and it is caused by Gram negative bacteria“Candidatus Liberibacter asiaticus”,which is transmitted by the Asian citrus psyllid(ACP),Diaphorina citri.Through many international projects,Vietnam has studied on it and the control measures against it,including removing diseased trees,selecting resistant varieties,changing time and density of citrus planting,intercropping,chemical and biological control,spraying mineral oils,supplying organic fertilizer,utilization of pest free seedlings and grafting scions and avoiding freely moving the citrus seedlings in open air,etc.Controlling the black ant Dolichoderus thoracicus for better cultivation of the weaver ants,Oecophylla smaragdina,and interplanting of citrus with guava as staggered pattern might be used for reference to control HLB and ACP in China.