Results: 25

Essential oils from two Eucalyptus from Tunisia and their insecticidal action on Orgyia trigotephras (Lepidotera, Lymantriidae)

Biol. Res; 47 (), 2014
BACKGROUND: Essential oils extracted from aromatic and medicinal plants have many biological properties and are therefore an alternative to the use of synthetic products. The chemical composition of essential oils from two medicinal plants (Eucalyptus globulus and E. lehmannii) was determined and, their ...

The challenges of introducing a new biofungicide to the market: a case study

Electron. j. biotechnol; 16 (3), 2013
Background: Scientific literature contains many reports documenting the isolation and antagonist-testing of microorganisms with the potential for biological control in agriculture, however, very few have addressed all aspects involved in the long process that occurs before a potential strain, found and t...

Produção de conídios de Metarhizium anisopliae em meio sólido à base de resíduos agroindustriais

As crescentes despesas com o custo do meio para o cultivo de Metarhizium anisopliae levantam a necessidade de averiguar a eficiência de alguns resíduos agroindustriais que, além de propriedades nutricionais importantes, possuem grande disponibilidade e baixo custo. Os experimentos foram conduzidos no ...

Atividade predatória de Euseius citrifolius Denmark & Muma (Acari: Phytoseiidae) sobre Tenuipalpus heveae Baker (Acari: Tenuipalpidae)

O ácaro-plano-vermelho-da-seringueira, Tenuipalpus heveae Baker é uma importante praga de Hevea brasiliensis (Willd. ex. Adr. de Juss.) Müell. Arg. Entre os ácaros predadores, Euseius citrifolius Denmark & Muma tem sido frequentemente registrado nessa cultura. Este trabalho teve por objetivo determin...

The potassium impermeable apical membrane of insect epithelia: a target for development of safe pesticides

Mem. Inst. Oswaldo Cruz; 82 (supl.3), 1987
Columnar cell apical membranes (CCAM) in series with goblet cell apical membranes (GCAM) form an electroosmotic barrier separating the midgut lumen from epithelial cell cytoplasm. A unique K+ ATPase in GCAM generates three gradients across this barrier. A greater than 180 mV electrical gradient (lumen po...