title: Ecotoxicological study of insecticide effects on arthropods in common bean.
abstract: Arthropods are an important group of macroorganisms that work to maintain ecosystem health. Despite the agricultural benefits of chemical control against arthropod pests, insecticides can cause environmental damage. We examined the effects of one and two applications of the insecticides chlorfenapyr (0.18 liters a.i. ha-1) and methamidophos (0.45 liters a.i. ha-1), both independently and in combination, on arthropods in plots of common bean. The experiment was repeated for two growing seasons. Principal response curve, richness estimator, and Shannon-Wiener diversity index analyses were performed. The insecticides generally affected the frequency, richness, diversity, and relative abundance of the arthropods. In addition, the arthropods did not experience recovery after the insecticide applications. The results suggest that the insecticide impacts were sufficiently drastic to eliminate many taxa from the studied common bean plots.
authors.affiliation: Institute of Biodiversity and Forests, Federal University of Western Para, Santarém, 68005-050 Para, Brazil emersoncristi@gmail.com.
authors.forename: Emerson Cristi
authors.initials: EC
authors.lastname: de Barros
authors.affiliation: Department of Entomology, Federal University of Viçosa, Viçosa, 36571-000, Minas Gerais, Brazil.
authors.forename: Hudson Vaner
authors.initials: HV
authors.lastname: Ventura
authors.affiliation: Agricultural Research Center, Kansas State University, Hays, KS 66506.
authors.forename: Pablo Costa
authors.initials: PC
authors.lastname: Gontijo
authors.affiliation: Departament of Phytotechny, Federal University of Viçosa, Viçosa, 36571-000 Minas Gerais, Brazil.
authors.forename: Renata Ramos
authors.initials: RR
authors.lastname: Pereira
authors.affiliation: Department of Entomology, Federal University of Viçosa, Viçosa, 36571-000, Minas Gerais, Brazil.
authors.forename: Marcelo Coutinho
authors.initials: MC
authors.lastname: Picanço
mesh_terms: D000383:Agriculture / Q000379:methods; D000818:Animals; D001181:Arthropods / Q000187:drug effects*; D044822:Biodiversity; D001938:Brazil; D017753:Ecosystem; D007887:Fabaceae / Q000469:parasitology; D007306:Insecticides / Q000633:toxicity*; D009946:Organothiophosphorus Compounds / Q000633:toxicity*; D011722:Pyrethrins / Q000633:toxicity*
chemical_list: D007306:Insecticides; D009946:Organothiophosphorus Compounds; D011722:Pyrethrins; C014655:methamidophos; C436643:chlorfenapyr
keywords: agroecosystem; common bean; insecticide; toxicity