The state of Bahia ranks fourth in the national rank for citrus production, and the region of Chapada Diamantina is emerging an important producer of orange for fresh fruit market. Huanglongbing (HLB) is the major phytosanitary threat to Bahia citriculture. In Brazil, the disease was first reported in 2004 in São Paulo state. The bacterium Candidatus Liberibacter asiaticus (CLas) is one of the causal agents of HLB, which is transmitted by the insect vector Diaphorina citri Kuwayama (Hemiptera: Liviidae). Bahia is a HLB-free area; therefore, it is essential to monitor its citrus-producing areas to early detect any possible introduction of the CLas. This study aimed to monitor the presence of the bacteria in the insect vector. Diaphorina citri samples were collected from 2011 to 2014 in different cities located at Chapada Diamantina region and tested by qPCR for the presence of CLas. Three samples were considered positive to bacterium, and all from psyllids collected on Murraya paniculata in the city of Seabra.

巴伊亚州在柑桔生产的全国排名中排名第四，而查帕达·迪亚曼蒂纳（Chapada Diamantina）地区正在成为重要的新鲜水果橙生产国。黄龙病（HLB）是巴伊亚柠檬文化的主要植物检疫威胁。在巴西，该病于2004年在圣保罗州首次报道。细菌亚洲念珠菌（CLas）是HLB的病原体之一，它是由昆虫载体柠檬黄（Diaphorina citri Kuwayama）（半翅目：:科）传播的。巴伊亚州是无HLB的地区；因此，必须监控其柑橘产区，以及早发现CLas的任何可能引入。这项研究旨在监测昆虫载体中细菌的存在。柠檬黄从2011年至2014年在Chapada Diamantina地区的不同城市收集了样本，并通过qPCR测试了CLas的存在。三个样品被认为对细菌呈阳性，所有样品均来自在Seabra市Murraya paniculata上收集的木虱。