title: Toxicity of new pyrethroid in pest insects Asciamonuste and Diaphania hyalinata, predator Solenopsis saevissima and stingless bee Tetragonisca angustula.
abstract: There is increasing demand for new products for vegetable pest management. Thus, the aim of this study was to assess the toxicity of pyrethroids with acid moiety modifications to measure the insecticidal activity of these compounds on the lepidopteran vegetable pests Diaphania hyalinata (L.) (Lepidoptera: Pyralidae) and Asciamonuste (Latreille) (Lepidoptera: Pieridae) and evaluate their selectivity for the predatory ant Solenopsis saevissima (F. Smith) (Hymenoptera: Formicidae) and pollinator Tetragonisca angustula (Latreille) (Hymenoptera: Apidae: Meliponinae). Racemic mixtures of five new pyrethroids (30 µg molecule mg-1insect body weight) resulted in high (100%) and rapid (stable LD50after 12 h) mortality in D. hyalinata and A. monuste. In A. monuste, the trans-pyrethroid [12] isomer showed similar toxicity to permethrin. For D. hyalinata, the trans-pyrethroid [9] isomer and cis-pyrethroid [10] isomer were as toxic as permethrin. Due to their low selectivity, these new pyrethroids should be applied on the basis of ecological selectivity principles to minimize impacts on nontarget organisms S. saevissima and T. angustula.
authors.affiliation: a Federal Institute of Education, Science and Technology of Rio de Janeiro , Pinheiral , RJ , Brazil.
authors.forename: Shaiene C
authors.initials: SC
authors.lastname: Moreno
authors.affiliation: b Institute of Agrarian Sciences, Universidade Federal de Minas Gerais , Montes Claros , MG , Brazil.
authors.forename: Flaviano O
authors.initials: FO
authors.lastname: Silvério
authors.affiliation: c Department of Phytotechnology , Universidade Federal de Viçosa , Viçosa , MG , Brazil.
authors.forename: Mayara C
authors.initials: MC
authors.lastname: Lopes
authors.affiliation: d Department of Entomology , Viçosa , MG , Brazil.
authors.forename: Rodrigo S
authors.initials: RS
authors.lastname: Ramos
authors.affiliation: e Chemistry Department , Universidade Federal de Viçosa , Viçosa , MG , Brazil.
authors.forename: Elson S
authors.initials: ES
authors.lastname: Alvarenga
authors.affiliation: d Department of Entomology , Viçosa , MG , Brazil.
authors.forename: Marcelo C
authors.initials: MC
authors.lastname: Picanço
mesh_terms: D000818:Animals; D001000:Ants / Q000187:drug effects*; D001516:Bees / Q000187:drug effects*; D007306:Insecticides / Q000494:pharmacology* / Q000633:toxicity; D007814:Larva / Q000187:drug effects; D007915:Lepidoptera / Q000187:drug effects*; D026023:Permethrin / Q000494:pharmacology; D010571:Pest Control / Q000379:methods; D054817:Pollination; D011722:Pyrethrins / Q000737:chemistry / Q000494:pharmacology* / Q000633:toxicity; D018675:Toxicity Tests
chemical_list: D007306:Insecticides; D011722:Pyrethrins; D026023:Permethrin
keywords: Brassicaceae; Chemical control; Cucurbitaceae; insecticide synthesis; new molecules; nontarget organisms; selectivity