Citrus species hydroalcoholic extracts are promising alternatives for the sustainable coffee red mite (Oligonychus ilicis) management?

Abstract

The coffee red mite, Oligonychus ilicis, is an important pest for Conilon coffee, Coffea canephora. This study aimed to evaluate the acaricidal potential of Citrus aurantifolia and Citrus latifolia peels hydroalcoholic extracts against O. ilicis. The citrus peel extracts at concentrations of 0.10, 0.17, 0.30, 0.51, 0.87, and 1.50 % w v-1 were sprayed on O. ilicis and its mortality was evaluated. Data were subjected to Probit analysis (p≤0.05) with the R statistical software and the LC50 and LC90 were calculated. O. ilicis mortality was dose-dependent on the concentration of the citrus peel hydroalcoholic extract. The slope coefficients of the O. ilicis mortality curves as a function of the concentration of extracts were 2.6057 and 1.4498 for C. aurantifolia and C. latifolia extracts, with LC50 and LC90 of 0.173 and 0.537% w v -1, for the first, and 0.048 and 0.368% m v -1, for the second, respectively. C. latifolia presented more phenolics and tannins in its composition than C. aurantifolia. C. latifolia and C. aurantifolia extracts showed an effective acaricide effect against O. ilicis, being a promising alternative for coffee red mite management.

Effect of Mammea americana Aqueous Extract on the Control of the Coffee Red Spider Mite

“…The first report in Brazil occurred in 1950 in coffee tillages in the state of São Paulo (TOLEDO et al, 2018). In the state of Espírito Santo, O. ilicis is considered the second biggest pest of the Conilon coffee, Coffea canephora (Pierre & Froehner, 1897) (Rubiaceae) (Franco et al, 2021;Gomes et al, 2023).…”

“…Usually, the most used management method is chemical control, but when made incorrectly it can increase the mite's populational level, develop resistant populations, and eliminate populations of natural enemies (Liburd et al, 2019;Andrade et al, 2020;Piffer et al, 2023). In this context, the use of products based on secondary metabolites extracted from plants DELOS: Desarrollo Local Sostenible, Curitiba, v.17, n.54, p. 01-20, 2024 represents a more sustainable path to control arthropod pests (Toledo et al, 2018;Babaz et al, 2021;Gomes et al, 2023;Magnago et al, 2023).…”