Functional diversity of the cotton crops arthrofauna

Brazil stands out as the fourth-largest global producer of cotton, benefiting from favorable climatic conditions for crop development. However, these same conditions promote diverse arthropod fauna, encompassing pests and beneficial organisms that contribute ecological services to agroecosystems. This study investigated the functional diversity of arthropods in cotton cultivation under alternative management practices. For two growing seasons, arthropods were sampled and classified into functional groups: pollinators, predators, parasitoids, and detritivores. In addition, parasitized insects were recorded separately. The first season revealed low functional group richness, with only pollinators and predators observed. Diversity indices, such as Shannon and Simpson, were low across all phenological stages, with greater richness during reproductive phases. In contrast, the second season demonstrated increased richness and balance, with all five functional groups represented and higher diversity during reproductive stages. Indices reflected improved functional group distribution, indicating reduced dominance of specific groups and stabilization of the agroecosystem. The findings emphasize the significant influence of phenological stages on arthropod diversity, with reproductive phases offering critical resources for functional groups. Sustainable practices facilitated recovery and stabilization of the agroecosystem, improving richness and abundance of beneficial arthropods. These results highlight the potential of integrated, sustainable management practices in promoting ecosystem in cotton fields.