~ 1349 ~ Journal of Entomology and Zoology Studies 2020; 8(1): 1349-1352 E-ISSN: 2320-7078 P-ISSN: 2349-6800 JEZS 2020; 8(1): 1349-1352 © 2020 JEZS Received: 10-11-2019 Accepted: 12-12-2019 Gómez-Tah JR Tecnológico Nacional de México/I.T. Tizimín. Final Aeropuerto Cupul S/N. Tizimín, Yucatán, México Ruz-Febles NM Tecnológico Nacional de México/I.T. Tizimín. Final Aeropuerto Cupul S/N. Tizimín, Yucatán, México Campos-Navarrete MJ Tecnológico Nacional de México/I.T. Tizimín. Final Aeropuerto Cupul S/N. Tizimín, Yucatán, México Canul-Solís JR Tecnológico Nacional de México/I.T. Tizimín. Final Aeropuerto Cupul S/N. Tizimín, Yucatán, México Castillo-Sánchez LE Tecnológico Nacional de México/I.T. Tizimín. Final Aeropuerto Cupul S/N. Tizimín, Yucatán, México Corresponding Author: Gómez-Tah JR Tecnológico Nacional de México/I.T. Tizimín. Final Aeropuerto Cupul S/N. Tizimín, Yucatán, México Ethanolic extract of Cedrela odorata and Delonix regia for the control of Anthonomus eugenii Gómez-Tah JR, Ruz-Febles NM, Campos-Navarrete MJ, Canul-Solís JR and Castillo-Sánchez LE Abstract In recent decades, studies of plant-based products in their chemical part have been intensified, with an emphasis on secondary metabolites, which are involved in biological pest control and in some cases by activating defense processes in the providing preventive protection. This study evaluated the bioactivity of cedar (Cedrela odorata) and flamboyant (Delonix regia) extracts on adults of pepper weevil (Anthonomus eugenii). Mortality and repellency bioassays were performed in 150 ml volume bottles with various concentrations of extracts. The bioassays were completely random, with four repetitions for each treatment. In the assessed concentrations of Cedrela odorata, the mortality rate ranged from 20 to 30% of exposed insects. Concentrations of Delonix regia extract have mortality effect on Anthonomus eugenii from 76% to 85% on individuals exposed in the test. With regard to the repellency effect, the extracts of both plants had low effectiveness. Keywords: Bioassays, pest, agriculture, extracts Introduction Anthonomus eugenii Cano named as the pepper weevil is one of the most important pests in pepper crops [1] , specializes in attacking crops of Capsicum chinense and Capsicum annuum [2] . The damage caused by the larvae is manifested in the small number of fruits, their early fall, premature maturation and the production of deformed fruits [1, 3] . Rodríguez-Leyva et al., (2012) [4] estimate that in Mexico they are lost from $70 million to $80 million annually from the attack by A. eugenii. Its control consists a chemical and cultural control, which keeps pest level infestations low [5] , but in practice management falls on applications of insecticides like neonicotinoid (pyrethroids), were used widely by the producers, but created a new selection pressure on the populations of pest [6] . Pest control is commonly done with chemicals; however, irrational use of these agrochemicals, use of mixtures, use of ineffective products, application of persistent chemicals, inadequate equipment, increased frequency and dosage of applications leads to the elimination of insects the emergence of the resistance of major pests to pesticides, as well as water, air and soil pollution, accumulation of toxic waste and user poisoning [7] . This problem has driven the use of plant formulations with insecticide or insectistatic properties, which allow to manage pests, protect the crop and therefore obtain higher yield and quality in production without putting the health of man at risk and its environment [8] . Over the past two decades, studies of plant-based products have been intensified in their chemical part, with an emphasis on secondary metabolites, which are involved in biological control against pathogens or pests and in some cases activating processes of the plant and providing preventive protection [9] . In view of the mentioned before, this work was raised with the aim of evaluating the ethanol extracts of C. odorata and D. regia for an alternative to the control of for the control of A. eugenii. Materials and methods Plant material Plant material was collected for the elaboration of extracts, Two kilograms of ripe fruits of C. odorata and two kilograms of leaves of D. regia. These were collected in the Botanical Garden of the Tizimin Institute of Technology. The collection was carried out in the early hours of the morning to preserve the turgor of the samples.