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| Carrillo, Marcela Pedraza; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Bovi, Thaís de Souza; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Negrão, Adriana Fava; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Orsi, Ricardo de Oliveira; Universidade Estadual Paulista “Júlio de Mesquita Filho”. |
| Agrochemicals on crop cultivated areas is a source of contamination for bees and may cause physiological and behavioral disorders and mortality. The LD50 of the pesticides fipronil and imidacloprid was determined and their effect on the learning behavior of Apis mellifera L. honeybee evaluated. LD50 was determined by the ingestion of contaminated food with different concentrations of insecticide concentrations: Fipronil (0, 0.8, 0.4, 0.2, 0.1 and 0.05 µg bee-1) and imidacloprid (0, 0.4, 0.2, 0.1, 0.05 and 0.025 µg bee-1). The method of proboscis extension reflection (PER) and learning through citral odor evaluated their responses to food stimulation. LD50 obtained were 0.28 ± 0.11 and 0.10 ± 0.04 µg bee-1 for fipronil and imidacloprid, respectively. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beekeeping; Toxicity; Lethal dose Agrochemical fipronil; Beekeeping; Toxicity; Lethal dose. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/18683 |
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| Pereira,Aldo; Casals,Pedro; Salazar,Ana María; Gerding,Marcos. |
| Obscure mealybug, Pseudococcus viburni (Signoret), is a cosmopolitan pest that causes damage by suction of vascular juices and the production of honeydew, as well as for being a quarantine insect. Within control options, entomopathogenic fungi are a good alternative, nevertheless, more research is needed. In this research, the Metarhizium anisopliae var. anisopliae (Metschnikoff) isolate Qu-M984 was evaluated on P. viburni under laboratory conditions. Virulence was evaluated by lethal dose 50 (LD50) and lethal time 50 (LT50), for each of the four life stages of the female. The doses tested were 10(5), 10(6), 10(7) and 10(8) conidia mL-1. Also fecundity, egg size, fertility, and longevity of adult females were evaluated at doses of 10(5) and 10(6) conidia... |
| Tipo: Journal article |
Palavras-chave: Lethal dose; Lethal time; Biological control; Entomopathogenic fungus; Fecundity; Fertility; Longevity. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400009 |
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