Resumen

SERVIN, Rosalía et al. Monitoring of resistance to three insecticides on pepper weevil (anthonomus eugenii) in populations from baja california sur, mexico. INCI [online]. 2002, vol.27, n.12, pp.691-694. ISSN 0378-1844.

Summary Toxicity levels of three insecticides, carbaryl, endosulfan and methomyl, were determined in populations of the pepper weevil Anthonomus eugenii. Insect populations were obtained from three locations in Baja California Sur, Mexico: Benito Juárez (27º53’N, 113º46’W), San José Viejo (23º07’N, 109º43’W), and San Juan de los Planes (23º58’N, 109º56’W). The highest LC50 values were found for carbaryl (178.4, 635.4 and 5462.1 µg/ml), endosulfan was intermediate (36.5, 34.1 and 47.1 µg/ml, respectively); and the lowest LC50 values corresponded to methomyl (1.3, 1.7 and 2.7 µg/ml), to Benito Juárez, San José Viejo and San Juan de los Planes, respectively. It is concluded can be inferred that pepper weevil populations in the farming zone of San Juan de los Planes are resistant to the three insecticides used, and are significantly more resistant to carbaryl, than are pepper weevil populations in San José Viejo and Benito Juárez. Levels of insecticide susceptibility correspond to the amounts of insecticides used against the pepper weevil in the three locations, and are a response to the selective pressure exerted by those chemicals.

Palabras clave : Anthonomus eugenii ; Carbaryl ; Endosulfan ; Insecticides ; Methomyl ; Pepper Weevil .