Carabid beetles (Coleoptera: Carabidae) and biological control of agricultural pests in Latin America

Abstract

Abstract The well-diversified Latin American agriculture plays an essential role in the economy of that region, through the export of food and agricultural commodities. The region is expected to continue playing a significant role in world agricultural production and trade. Carabid beetles are efficient consumers of arthropod pests and weed seeds on agricultural land, which makes them a target for studies by entomologists aiming to determine whether predatory carabids are capable of suppressing pest populations. However, carabids have been mostly studied in temperate regions of the Northern Hemisphere. Here, evidence for carabids as biocontrol agents of agricultural pests in Latin America is examined, aiming to improve understanding of this predator group in Latin American agroecosystems. The records found were organized into the following subject areas: conservation tactics, biocontrol agents, agricultural practices, and population survey. The literature review identified several gaps in knowledge of these topics, which made it possible to indicate potential research projects related to noncrop habitats, population studies, and consumption of weed seeds. Laboratory investigations of carabids’ predatory capacity indicated that they have the potential to control pests. However, field studies have failed to demonstrate that carabids significantly decreased pest densities. Although polyculture is a traditional practice of smallholder farmers in Latin America, the literature involving carabids and this sustainable agriculture practice is sparse. Looking forward, the utilization of polyculture and the existing no-till system in large fields provide opportunities for future research on ground beetles in Latin America.