Avaliação in vitro de produtos fitossanitários alternativos e extratos vegetais sobre Metarhizium anisopliae (Metsch.) Sorok. (Clavicipitaceae)

Resumen

This study aimed to evaluate in vitro effect of commercial products Dalneem®, Ecolife® e Stubble-Aid® in recommended concentration of the product (RC), half that concentration (½RC) and twice that concentration (2RC) and the aqueous extracts of rhizomes of Curcuma longa (Zingiberaceae) and leaves of Cymbopogon citratus (Poaceae), Corymbia citriodora (Myrtaceae) and Rosmarinus officinalis (Lamiaceae) in 10% concentration (w/v) on Metarhizium anisopliae, which were sprayed onto the fungus previously grown in Petri dishes with PDA (potato, dextrose and agar) culture medium. There were analyzed the colony forming units (CFU), vegetative growth, conidial production, conidial germination and insecticidal activity against larvae of Diatraea saccharalis Fabr. (Lepidoptera: Crambidae). Although commercial products significantly affected some biological parameters of the fungus, only Dalneem® 2RC was classified as incompatible with the fungus. The plant extracts caused significant effect only to vegetative growth (ranging from 4 to 7%), and were all classified as being compatible with the strain of M. anisopliae.