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A Review of Huanglongbing (Citrus Greening) Management in Citrus Using Nutritional Approaches in China

Y. Xia, G. Ouyang, R. A. Sequeira, Y. Takeuchi, I. Baez, and J. Chen

October 2011


The Asian form of huanglongbing (HLB) is caused by ‘Candidatus Liberibacter asiaticus (Las),’ a phloem-limited bacterium transmitted by the Asian citrus psyllid, Diaphorina citri Kuwayama (ACP). Nutrient management, together with other cultural practices such as pruning and irrigation, for mitigation of the disease has been practiced in China for many years. Our literature review, field survey, and interviews with Chinese scientists and growers indicate that these cultural practices were generally ineffective for the disease management. However, a nutritional approach in conjunction with other cultural practices such as irrigation can maintain grove productivity for a certain time depending on the type of citrus species/cultivars, the age of the trees, the propagation method of the plants, the ACP population, and other factors. Symptomatic mature pommelo and sweet orange plants can commonly survive and maintain a certain level of productivity for an additional 4 to 5 years, even longer assuming vigorous ACP control.


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