Bioactivity of aqueous extracts of Anadenanthera macrocarpa to Meloidogyne incognita in cotton crop

Abstract

The black angico (Anadenanthera macrocarpa) contains some phenolic compounds, such as flavonoids and tannins, which are considered as secondary metabolites with antimicrobial properties and can be used in the nematodes management. The experimental design was completely randomized in a factorial (2 x 5) + 1 (leaf and bark x concentrations (20, 40, 60, 80 and 100 g L -1 ) + control water-only), with five replications. The cotton seedlings were inoculated with suspension of 4,400 juveniles and eggs of M. incognita. The extracts were applied on soil in a total of 100 mL per pot, in four installments of 25 mL each, in intervals of 15 days . After 60 days of the extracts application, agronomic parameters and parasitism characterist ics were evaluated. Plant height and fresh mass of aerial part presented considerable gain with application of leaf extracts. All extracts, regardless of concentration, showed independent suppressive effect to M. incognita. The black angico extracts presented potential capacity to control gall nematodes by the presence of metabolite compounds that affect the plants protection. These results reinforce the need of further studies regarding the isolation of chemical compounds with nematicide action.

Management of Meloidogyne javanica in Okra Using Compost of Pequi Fruit Waste

“…Some studies have shown that tannins reduce the hatching rate, inactivate J 2 of Meloidogyne spp. and reduce the number of galls (Maistrello et al, 2010;Fonseca et al, 2017).…”

POTENCIAL INSETICIDA DO EXTRATO ETANÓLICO DE Anadenanthera macrocarpa (BENTH.) EM LEPIDÓPTEROS-PRAGA

“…Estes compostos naturais apresentam papel fundamental na defesa das plantas, possuem ação antimicrobiana produzidos em resposta ao ataque de microrganismos (FONSECA et al, 2017) e compostos anti-herbivoria que impedem ataques de herbívoros (WAR et al, 2011).…”