Percolaspis ornata (Germar) (Coleoptera, Chrysomelidae) is known in Brazil as an important pest of cocoa in the states of Bahia and Espírito Santo. We recently identified a Chrysomelidae species feeding and causing damage to soybean, corn, and cotton crops in the state of Mato Grosso, Brazil. The species was identified as Percolaspis cf. ornata. Adults feed on young leaves and sprouts and, in many cases, cut the stem of seedlings, causing stand reduction and yield losses. Its attacks have been recorded since 2016 in the central region of Mato Grosso. Because of the importance of the state of Mato Grosso as the main grain producer in the country, it is necessary to monitor crops for the occurrence of this insect in the next harvests and the development of basic and applied studies aimed at defining management strategies for this emerging pest. This is the first record of P. cf. ornata causing damage to soybean, maize, and cotton crops in Brazil.

Percolaspis ornata (Germar)（鞘翅目、叶科）在巴西是巴伊亚州和圣埃斯皮里图州可可的重要害虫。我们最近在巴西马托格罗索州发现了一种叶甲科物种，它们以大豆、玉米和棉花作物为食并造成损害。该物种被鉴定为Percolaspis cf.奥纳塔。成虫以嫩叶和芽为食，在许多情况下，会切断幼苗的茎，导致林分减少和产量损失。自 2016 年以来，马托格罗索州中部地区就记录了该组织的袭击事件。由于马托格罗索州作为该国主要粮食生产国的重要性，因此有必要在下次收获时监测作物是否出现这种昆虫，并开展基础和应用研究，旨在确定这种昆虫的管理策略新出现的害虫。这是P. cf 的第一个记录。 ornata对巴西的大豆、玉米和棉花作物造成损害。