Manejo de insetos por meio de plantas bioativas em sistemas de produção de base ecológica.

bitstream/item/75447/1/gustavo-4.pdfArtigo em Hypertexto. Disponível em: http://www.infobibos.com/Artigos/2012_2/manejoinsetos/index.htm. Acesso em: 28 jan. 2013

Alimentação em minhocários.

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Sistema orgânico de produção de morangos.

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Physical properties of botanical surfactants.

Some vegetal species have saponins in their composition with great potential to be used as natural surfactants in organic crops. This work aims to evaluate some surfactants physical properties of Quillaja brasiliensis and Agave angustifolia, based on different methods of preparation and concentration. The vegetal samples were prepared by drying and grinding, frozen and after chopped or use dfreshandchopped. The neutral barsoapwasusedasa positive control. The drying and grinding of samples were the preparation method that resulted in higher foam col-umnheightinbothspeciesbut Q. brasiliensis was superior to A. angustifolia in all comparisons and foam index was 2756and 1017respectively. Critical micelleconcentration of Q. brasiliensis was 0.39% with the superficial tension of 54.40 mN m?1while neutral bar soap was 0.15% with 34.96 mN m?1. Aspects such as genetic characteristics of the species, environmental conditions, and analytical methods make it difficult to compare the results with other studies, but Q. brasiliensis powder has potential to be explored as a natural surfactant in organic farming. Not only the surfactants physical properties of botanical saponins should be taken into account but also its effect on insects and diseases control when decided using them

Avaliações de populações microbianas em húmus de minhoca a partir da combinação de esterco bovino com diferentes resíduos orgânicos.

Este trabalho teve por objetivo avaliar as densidades populacionais de bactérias e fungos em húmus de minhocas da espécie Eisenia Andrei Bouché produzidos a partir de diferentes combinações de esterco bovino com cascas de amendoim e borra de café.ENPOS

Sanguessugas em minhocários.

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Minhocultura e produção de húmus para a agricultura familiar.

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