title: Effects of herbicide and insecticide interaction on soil entomofauna under maize crop.
abstract: The aim of this study was to evaluate the impact of the herbicide mixture nicosulfuron + atrazine, with or without the insecticide chlorpyrifos, onto soil entomofauna under maize crop. The treatments, applied 25 days after maize emergence, were represented by a weeded control without insecticide and herbicide, a weeded control with chlorpyrifos, and mixtures of nicosulfuron + atrazine, with or without chlorpyrifos. Arthropods populations, on the soil surface, as well as inside the soil under maize, were principally represented by mites (Arachnida: Acari), decomposer collembolans (Hexapoda:Parainsecta:Collembola) and predator ants (Hymenoptera:Formicidae). The nicosulfuron + atrazine mixture with chlorpyrifos and the isolated chlorpyrifos reduced the population dynamics of all insect groups on the soil surface compared to the weeded control. In the soil, mite and ant populations were reduced after application of the herbicide mixture with chlorpyrifos and of the isolated chlorpyrifos.
authors.affiliation: Departamento de Fitotecnia, Universidade Federal de Viçosa, Viçosa, Brazil.
authors.forename: Jardel Lopes
authors.initials: JL
authors.lastname: Pereira
authors.forename: Antonio Alberto
authors.initials: AA
authors.lastname: da Silva
authors.forename: Marcelo Coutinho
authors.initials: MC
authors.lastname: Picanço
authors.forename: Emerson Cristi
authors.initials: EC
authors.lastname: de Barros
authors.forename: Adriano
authors.initials: A
authors.lastname: Jakelaitis
mesh_terms: D000818:Animals; D001280:Atrazine / Q000506:poisoning*; D004390:Chlorpyrifos / Q000506:poisoning*; D004347:Drug Interactions; D020387:Food Chain; D006540:Herbicides / Q000506:poisoning*; D007313:Insecta / Q000254:growth & development*; D008925:Mites / Q000254:growth & development; D011157:Population Dynamics; D011725:Pyridines / Q000506:poisoning*; D012989:Soil Pollutants / Q000506:poisoning*; D013453:Sulfonylurea Compounds / Q000506:poisoning*; D003313:Zea mays
chemical_list: D006540:Herbicides; D011725:Pyridines; D012989:Soil Pollutants; D013453:Sulfonylurea Compounds; C416723:nicosulfuron; D004390:Chlorpyrifos; D001280:Atrazine