Diversidad y grupos funcionales de insectos en cultivos de arroz y sus bordes bajo manejo convencional y agroecológico en Santa Fe, Argentina

CARLA GHIGLIONE; ZUMOFFEN LETICIA; DALMAZZO, MILAGROS; STRASSER RUTH; ANDRES MAXIMILIANO ATTADEMO

ECOLOGÍA AUSTRAL

ASOCIACIÓN ARGENTINA DE ECOLOGÍA

Lugar: Buenos Aires; Año: 2021 vol. 31

0327-5477

A􀑏􀑠􀑡􀑟􀑎􀑐􀑡. Diversity and functional groups of insects in rice crops under conventional and agroecological management in Santa Fe province, Argentina. Ecosystem services provided by insects, such as pollination and pest control, are essential for food production and agricultural health. The aims of this work were to 1) compare insect diversity in rice crops and their containment edges in two farms under different management systems (conventional and agroecological), 2) characterize functional groups of insects in rice crops and their containment edges, under different management systems, and 3) analyze the interactions of functional groups of insects with vegetation in the containment edges. Sampling was conducted during a rice production cycle in the spring-summer 2017-2018 in farms under conventional management practices (EMC) and agroecological management (EMA) in an area of intensive rice production (San Javier Department, Santa Fe, Argentina). A total of 1008 insects belonging to 236 species and morphospecies were captured using entomological nets. Containment edges exhibited higher richness, abundance and diversity than crops, with the EMA standing out for the presence of all five functional groups. On both farms, Sepedonea sp., Protodictya sp. and Eryopis connexa (L.), known control agents of gastropods and insect pests, were recorded. A total of 397 insect-plant interactions were registered in agroecological containment edges, and only 175 in conventional ones. The results obtained in this work make a novel contribution to the knowledge of insects present in containment edges and in rice crops. This work provides knowledge on the diversity, composition and distribution of the insect community, as well as data on the floral offer of the vegetation growing in containment edges and its relationship with the entomofauna.