60 research outputs found
Larvicidal activity of Ramalina usnea lichen against Aedes aegypti
AbstractThe larvicidal activity of the methanol extract, fractions and compounds 2-hydroxy-4-methoxy-6-propyl-methyl benzoate and (+)-usnic acid identified from the lichen Ramalina usnea (L.) R. Howe, Ramalinaceae, was tested against the third instar larvae of the Aedes aegypti mosquito. The methanol extract and three fractions showed activity, killing 100% and 96.6% of the larvae at a concentration of 150μg/ml at 24h. The isolated compounds, 2-hydroxy-4-methoxy-6-propyl-methyl benzoate and the (+)-usnic acid showed larvicidal activity, presenting LC50 values of 4.85 and 4.48μg/ml, respectively. This is the first study of its kind reporting the larvicidal activity against the A. aegypti mosquito with compound (1)
Organic acids in diets of weaned piglets: performance, digestibility and economical viability
Fire management and the nesting of Athene cunicularia (Aves, Strigidae) in grasslands in central Cerrado, Brazil
Influência de silicato e calcário na decomposição de resíduos culturais e disponibilidade de nutrientes ao feijoeiro
Influência do teor de água na superfície do solo sobre a eficácia e seletividade do flazasulfuron, na cultura de cana-de-açúcar
Influência das espécies do plasma na modificação das propriedades superficiais do titânio tratado por plasma de N2 - Ar - O2
Parasitism of Tuta absoluta in tomato plants by Trichogramma pretiosum Riley in response to host density and plant structures
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