The leaf‐cutting ants of the genus Atta are of extreme importance for agriculture and forestry. Few active products can be employed to control these pests and, therefore, the discovery of new insecticidal products represents a fundamental strategy for its management. In this study, we evaluated the mortality, behaviour and locomotion of workers of Atta opaciceps (Borgmeier) exposed to synthesized indole derivatives. The most active compound was 4d [1‐(1H‐indol‐3‐yl)pentan‐1‐one] (LD50 = 0.018 μg/mg), while the 4e [1‐(1H‐indol‐3‐yl)hexan‐1‐one] (LD50 = 3.82 μg/mg) was the least active compound. These two derivatives reduced the survival of A. opaciceps over time and altered the behaviour and locomotion of these ants. This study demonstrates the potential of indole derivatives to produce new formicidal products, since, in addition to being effective, it also affects the ant's behaviour and locomotion.

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O objetivo deste trabalho foi avaliar o potencial degradador in vitro de fungos causadores de podridão branca em serragem de clones de eucalipto. As espécies fúngicas de podridão branca utilizadas nos testes in vitro foram: Pycnoporus sanguineus, Phellinus gilvus e Schizophyllum commune. O experimento foi realizado em arranjo fatorial 3 x 3, disposto em delineamento inteiramente casualizado. Os parâmetros analisados foram: diâmetro do crescimento micelial (cm), velocidade de crescimento (cm dia -1 ), densidade micelial dos isolados fúngicos e perda de massa da serragem (%). Os isolados Phellinus gilvus e Pycnoporus sanguineus apresentaram maior velocidade de crescimento e resultaram em maior perda de massa da serragem em relação ao Schizophyllum commune. Pycnoporus sanguineus apresentou maior adensamento micelial que os demais isolados em todos os clones testados. Dentre os clones testados, o 2361 foi o que resultou em menor velocidade de crescimento dos isolados fún-gicos e menor perda de massa da serragem, mas favoreceu a formação de micélio mediamente a fortemente adensado em todos os isolados fúngicos. Dos isolados testados, Pycnoporus sanguineus e Phellinus gilvus foram os mais eficientes na degradação in vitro da serragem de eucalipto. Palavras-chave: biodegradação, basidiomicetos, eucaliptoEvaluating the degradation potential of whiterot fungi AB S TR ACTThe objective of this work was to evaluate the in vitro degrading potential of white-rot fungi in sawdust of eucalyptus clones. The white-rot fungi species tested were: Pycnoporus sanguineus, Phellinus gilvus and Schizophyllum commune. The experiment was carried out in factorial arrangement 3 x 3, displayed in a completed randomized design. The analysed parameters were: diameter of the mycelial growth (cm), speed of growth (cm day -1 ), mycelial density of the fungal isolate and loss of sawdust mass (%). The isolated Pycnoporus sanguineus and Phellinus gilvus presented higher speed growth and resulted in higher loss of sawdust mass when compared to Schizophyllum commune. Pycnoporus sanguineus presented the highest mycelial density in all clones tested. Clone 2361 resulted in the smallest fungal isolate growth and smaller loss of sawdust mass, but it favored the formation of moderately and highly dense mycelial in all isolates. The most efficient in in vitro degradation of eucalyptus sawdust was achieved with Pycnoporus sanguineus and Phellinus gilvus.

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