9 documents found, page 1 of 1

Imidacloprid induces histopathological damage in the midgut, ovary, and spermat...

Expression of MRJP3 and HSP70 mRNA levels in Apis mellifera L. Workers after di...

Comparative toxicity of fipronil, malathion, and thiamethoxam on the stingless ...

Stingless bees are important pollinators for various plant crops. We investigated the susceptibility of Tetragonisca fiebrigi to sublethal concentrations of insecticides fipronil, malathion, and thiamethoxam (administered through contact and ingestion) by determining the LC50 values after 24 hours of exposure and analyzing changes in the activity of esterase isoenzymes and the chromatin in brain cells. The LC50...

Analysis of a dose-response assay in Scaptotrigona bipunctata bees, Lepeletier,...

BIOPROSPECÇÃO DE PEPTÍDEOS ANTIMICROBIANOS EM LARVAS DE CALLIPHORIDAE (DIPTERA)...

Os insetos apresentam a maior biodiversidade entre a classe Animal e são fontes ricas de produtos biotecnológicos. Espécies da família Calliphoridae (Diptera) apresentam hábitos necrófagos durante a fase larval, assim são expostas a diferentes microrganismos, produzindo peptídeos antimicrobianos (AMPs) como sistema de defesa. O objetivo deste trabalho foi realizar um levantamento bibliográfico dos principais pe...

Analysis of a dose-response assay in Scaptotrigona bipunctata bees, Lepeletier,...

This paper shows the results of a dose-response study in Scaptotrigona bipunctata bees, Lepeletier, 1836 (Hymenoptera: Apidae) exposed to the insecticide Fastac Duo. The aim was to evaluate the lethal concentration that causes the death of 50% of bees (LC50) and investigate the odd of mortality after exposure to different concentrations, using the logistic regression model under the Bayesian approach. In this a...

Concentração de açúcares no néctar e visitantes florais do siratro (Macroptiliu...

Siratro (Macroptilium atropurpureum Urb.) é uma planta forrageira com alto valor nutricional e excelente palatabilidade, sua fenologia é pouco conhecida. Objetivando melhorar o conhecimento e compreensão dos polinizadores do siratro e sua biologia floral, o conteúdo de açúcares totais no néctar de suas flores e a identificação desses açúcares foram determinados por espectrofotometria e cromatografia, respectiva...

Floral biology and bees pollination by bees in siratro (Macroptilium atropurpur...

This research was carried out to evaluate the pollination in siratro studying the anthesis period, pollen grain viability and seed production. Two treatments were used, one covered and another uncovered. The anthesis period was 2.48 days and 3.56 days (p = 0.0001) and the production was 8.62 and 11.15 seeds (p = 0.0023), in covered and uncovered treatments, respectively. The stigma receptivity test showed that ...

Evaluation of different types of stingless bees hives (Tetragonisca angustula L...

This research was carried out to evaluate the performance of stingless bees' colonies, Tetragonisca angustula Latreille, 1811 (Hymenoptera, Meliponinae), in Maringá region in the south of Brazil. Twenty colonies were settled in the following types of hives: Fritzen, Guiliani, Nogueira-Neto, and Antonio Carlos Farias (ACF), with five replications each type. The experimental season was from December, 1999 to Dece...