Resumen

CARRILLO-AGUILERA, Juan Carlos et al. Susceptibility of Bemisia tabaci to chemical and organic insecticides in the Comarca Lagunera. Rev. Mex. Cienc. Agríc [online]. 2025, vol.16, n.7, e3824.  Epub 13-Feb-2026. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v16i7.3824.

Melon crops are affected by Bemisia tabaci, which causes losses of up to 100% of the production; to control this pest, chemical active ingredients that can generate resistance are used. This research aimed to determine the susceptibility of B. tabaci populations through chemical and organic pesticides in melon-producing areas in the Comarca Lagunera. In 2023, four populations of B. tabaci were collected in the localities of Matamoros, Coahuila, Esmeralda, Tlahualilo and Ceballos, Durango. Bioassays were performed using the leaf immersion technique to determine the median lethal concentration (LC50), as well as to obtain the dose-mortality curve and the resistance ratio based on a susceptible line (Njcs). According to the results, the extracts of mustard and garlic and the active ingredients Imidacloprid and Dimethoate obtained the highest LC50, with values of 430.84, 404.19, 449.71 and 1 607 ppm in the Matamoros population. For the active ingredients Lambda-cyhalothrin and Chlorantraniliprole, the Ceballos population presented LC50 values of 234.18 and 165.31 ppm, respectively. In the case of the resistance ratio, the Matamoros population obtained the highest values for mustard and garlic extracts, Imidacloprid, and Dimethoate, with 16.23, 11.85, 11.89, and 6.12 X, respectively. For the active ingredients Lambda-cyhalothrin and Chlorantraniliprole, the Ceballos population reached values of 12.7 and 6.71 X. According to the results, the Matamoros population showed greater resistance to the active ingredients evaluated compared to the susceptible line.

Palabras llave : Bemisia tabaci; Cucumis melo; extracts.

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