Muitos processos que estruturam o solo são realizados por invertebrados edáficos, sendo os insetos o principal grupo. A ordem Coleoptera é a maior dentro da classe Insecta, tendo a família Scarabaeidae uma das mais representativas e importantes. O objetivo deste trabalho foi conhecer a fauna de Scarabaeidae edáficos em um remanescente florestal no município de Plácido de Castro, AC. O estudo foi realizado entre agosto de 2014 a agosto de 2015, utilizando 22 armadilhas pitfalls (copos plásticos de 500 mL) dispostas em dois transectos, distanciadas cinco metros entre si, com espaçamento de 10 m entre armadilhas. Em cada armadilha foi adicionada uma solução de formaldeído (1%) e gotas de detergente neutro, com coletas quinzenais. No laboratório de Entomologia da Embrapa Acre os insetos foram triados e identificados com auxílio de literatura apropriada. Foram capturados 218 espécimes, representados por quatro tribos, sete gêneros e 15 espécies. A tribo Coprini foi a mais representativa, com nove espécies capturadas, sendo sete correspondendo ao gênero Canthidium. Pelo número de espécies capturadas e nichos alimentares conclui-se que o remanescente florestal estudado apresenta baixo grau de antropização.
Anthracnose (Colletotrichum gloeosporioides) is the main disease affecting single assai palm seedlings and, therefore, a limiting factor to the production of quality seedlings. So far, there are no fungicide recommendations for the control of C. gloeosporioides in Euterpe precatoria. Thus, this study aimed to investigate the action of fungicides, such as pyraclostrobin + fluxapyroxad, as a possible alternative for controlling anthracnose in single assai palm seedlings. The experiment was installed in the nursery at Embrapa Acre, in a randomized block design, with seven treatments (0 – 0.155 – 0.187 – 0.218 – 0.250 – 0.281 – 0.312 μl of fungicide), with four replications of five plants. Evaluations were conducted for ten months regarding seedling height, stem diameter, number of leaves, shoot dry mass, root dry mass, total dry mass, and Dickson Quality Index. A visual scale ranging from 1 to 9 was used to assess the severity of the disease. The data were submitted to analysis of variance and regression analysis. Under the study conditions, the application of the active ingredient pyraclostrobin + fluxapyroxad reduced anthracnose severity by an average of 36.94% in single assai palm, providing better quality seedlings in the nursery.
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