Avaliação de extrato de AbstractThe objective of this work was to evaluate the potential alelopatico of aqueous extract of aerial part fresh Melaleuca alternifolia (Cheel) on the germination of seeds of Brachiaria brizantha subjected to bioassay of laboratory. The aqueous extracts were tested at concentrations of 0% (distilled water -witness), 5%, 10%, 15% and 20%, obtained by means of dilution in distilled water. The objective of this study was to evaluate the germination percentage, germination speed index and average time of germination. All characteristics were submitted to analysis of variance and means compared by Tukey test at 5% probability. It was found that in B. brizantha concentrations above 20% reduced, significantly, the percentage of germination and compared to control (0%) there was a difference of 36.65% on germination. For average germination time the negative effects began at a concentration of 10% being that with the treatments successors did not differ statistically among themselves.

ResumoA peletização de sementes vem sendo caracterizada como uma importante forma de maximização nos custos de produção de mudas pelo fato de reduzir o trabalho e mão de obra de distribuição manual de sementes, reduzindo ainda a prática do desbaste de plantas excedentes. No entanto, o interesse comercial pelo encapsulamento de semente avançou após a semeadura mecanizada, prática de plantio direto e, principalmente, pela possibilidade de inserção de nutrientes, reguladores de crescimento e aplicação de agrotóxicos como forma de constituir melhorias na sanidade das plantas. Nesse sentido, objetivou-se avaliar a produção de mudas de alface (Lactuca sativa L. c.v. Grand Rapids) oriundas de sementes peletizadas com preparados homeopáticos submetidas à cobertura de homeopatia de Phosphorus 30CH. Os resultados apontam que a utilização de homeopatia de Sulphur 6CH e Nux vomica 6CH são capazes de propiciar mudas sadias e vigorosas quando comparadas com a testemunha.Palavras-chave: agroecologia; homeopatia; Lactuca sativa L. AbstractThe seed pelleting has been characterized as an important way of maximizing the seedlings production costs because of lower labor and manpower manual seed distribution, while reducing the practice of surplus plants thinning. However, the commercial interest in seed encapsulation advanced after mechanized seeding, tillage practice and especially the possibility of inclusion of nutrients, growth regulators and pesticides application as a way to provide improvements in the health of plants. In this sense, the objective was to evaluate the production of lettuce seedlings (Lactuca sativa L. cv. Grand Rapids) arising from pelleted seeds with homeopathic