Atividade "in vitro" de extratos de pycnoporus sanguineus e lentinus crinitus sobre o fitopatógeno fusarium sp

Abstract

The alternative control of plant diseases aims to minimize environmental impacts through the use of natural products. The objective of this work was to evaluate the in vitro activity of aqueous and hydroalcoholic extracts from Pycnoporus sanguineus and Lentinus crinitus against Fusarium sp. A fungus known to cause disease in plants. Fungis amples were collected in the urban and rural areas of Parintins-AM, and tested against different extracts concentrations. Inhibition of mycelia growth, inhibition of conidial germination and inhibition of germination of sclerotia were assessed. Mycelial growth inhibition was highest with hydroalcoholic cold extracts. Hydroalcoholic and aqueous extracts from P. sanguineus obtained by ultrasonic ation and hydroalcoholic cold extract from L. crinitus caused 92% of conidia sporulation. Aqueous hot extracts inhibited sclerotia germination in both fungi samples as well as hydroalcoholic cold extract from L. crinitus. Fungi consortium inhibited sclerotia germination at 1000 μg mL-1 concentration.