Xylosandrus compactus is one of the significant beetle pests on perennial crops, which has become an increasing problem on cacao productivity and sustainability in South Sulawesi, Indonesia. The beetle is also known as ambrosia beetle due to the obligate association with symbiotic fungi. The beetle and infested plant parts were collected from infested Theobroma cacao in the field, then the beetles identified morphologically and the associated fungi isolated. In this study, we found that the beetles attacked all stages of cocoa growing in the field such as seedling, young trees and mature trees with visible symptoms including the appearance of round bore holes with powdery frass on the tree trunk and branches. Also, we found the beetle being distributed in three main cocoa areas in South Sulawesi. According to the beetle´s characteristic, the female has the black colour of the body (head and elytra), size 1–2 mm and the shining slope. Six types of fungi were isolated from infected plant parts and the beetle X. compactus: Fusarium-like colony (two isolates), Lasiodiplodia-like colony, Ceratocyctis-like colony and Diaporthe-like colony (two isolates). Among the fungi isolated, several fungi were known as the pathogen. The beetle and its associated fungi are responsible for the typical dieback symptoms, decline and sudden death inflicted on a number of cacao trees. The occurrence of X. compactus on cacao tree is reported for the first time from Sulawesi, Indonesia. The beetle pest infestation will become a significant threat to the future of the cacao industry in Sulawesi, Indonesia.

致密木霉（Xylosandrus compactus）是多年生作物上的重要甲虫害虫之一，在印度尼西亚南苏拉威西，这已成为可可产量和可持续性日益严重的问题。由于与共生真菌的专性结合，该甲虫也被称为安布罗西亚甲虫。甲虫和被感染的植物部分是从可可可可可中收集的在田间，然后从形态上鉴定甲虫并分离相关的真菌。在这项研究中，我们发现甲虫攻击了田间可可生长的所有阶段，例如幼苗，幼树和成熟树，这些树的可见症状包括在树干和树枝上出现带有粉状fass的圆孔。此外，我们发现甲虫分布在南苏拉威西省的三个主要可可地区。根据甲虫的特征，雌性的身体呈黑色（头部和鞘翅目），大小为1-2毫米，且有光泽。六种类型的真菌是从受感染的植物部分和甲虫分离X. compactus：镰状细胞集落（两种分离物），Lasiodiplodia样细胞集落，Ceratocyctis样菌落和Diaporthe样菌落（两个分离株）。在分离出的真菌中，几种真菌被称为病原体。甲虫及其相关真菌是造成可可树上典型的枯死症状，衰退和猝死的原因。印度尼西亚苏拉威西岛首次报道了可可树上的致密线虫发生。甲虫害虫的侵害将成为印度尼西亚苏拉威西可可工业未来的重大威胁。