Influence of the agrochemicals used for rice and vegetable cultivation on insecticide resistance in malaria vectors in southern Côte d’Ivoire

Malaria Journal

Research

Mouhamadou S. Chouaïbou¹  Bassirou Bonfoh¹  Gilbert Fokou¹  Ouattara F. Allassane²  Behi K. Fodjo²  Jean-Philippe David³  Hilary Ranson⁴  Christophe Antonio-Nkondjio⁵  Benjamin G. Koudou⁶ 

[1] Centre Suisse de Recherches Scientifiques en Côte d’Ivoire, 01BP 1303 Abidjan 01,, Abidjan, Côte d’Ivoire;Centre Suisse de Recherches Scientifiques en Côte d’Ivoire, 01BP 1303 Abidjan 01,, Abidjan, Côte d’Ivoire;Université Nangui Abrogoua, Abidjan, Côte d’Ivoire;Laboratoire d’Ecologie Alpine (LECA), UMR 5553 CNRS-Université Grenoble-Alpes, BP 53, 2233 Rue de La Piscine, Bât. D Biologie, 38041, Grenoble, France;Liverpool School of Tropical Medicine, Pembroke Place, L3 5QA, Liverpool, UK;Organisation de Coordination Pour La Lutte Contre Les Endémies En Afrique Centrale (OCEAC), PO Box 288, Yaoundé, Cameroon;Université Nangui Abrogoua, Abidjan, Côte d’Ivoire;Liverpool School of Tropical Medicine, Pembroke Place, L3 5QA, Liverpool, UK;

关键词: Glyphosate;    Malathion;    Indoor Residual Spray;    Malaria Vector;    Insecticide Resistance;   

DOI  :  10.1186/s12936-016-1481-5

 received in 2016-06-28, accepted in 2016-08-10,  发布年份 2016

来源: Springer

【 摘 要 】

BackgroundVector control can contribute to the development of resistance to insecticides in malaria vectors. As the swamps and wetlands used for some agricultural activities constitute productive breeding sites for many mosquito species, agricultural pest control may increase the selection pressure for insecticide resistance in mosquitoes. Understanding the use of agrochemicals by farmers is important to plan and initiate effective integrated pest and vector management interventions.MethodsA knowledge–attitude–practice study, using questionnaires, was undertaken with 102 rice farmers in Tiassalé and 106 vegetable farmers in Dabou (South Côte d’Ivoire) in order to generate information on pesticide usage. In addition, insecticide susceptibility bioassays were conducted using adult mosquitoes obtained from larvae collected within farms, and the persistence of agricultural pesticides in the farming environment, including sediment and mosquito breeding site water, was investigated by HPLC.ResultsHerbicides and insecticides appeared to be the most frequently used pesticides for both crops. Amino phosphonates (mostly glyphosate) represented the most used herbicides (45 % for rice up to 89 % for vegetables). Pyrethroids appeared to be the most used insecticides (accounting for 90 % of all the insecticide use reported). Approximately 75 % of respondents had not been to school and do not understand product labels. Only about 45 % of farmers respect the recommended pesticide dosage and about 10–15 % of pesticides used for rice and vegetable, respectively, are not recommended for these crops. As per WHO criteria, the mosquito local populations from the two localities were resistant to three of the four insecticides tested, as mortalities were less than 35 % for deltamethrin, DDT and bendiocarb. Higher susceptibility was observed for malathion, although the population was considered resistant in Dabou (80 % mortality) and susceptible in Tiassalé (98 % mortality). With the exception of glyphosate, residues from each of six chemicals tested for were detected in each of the sites visited in the two localities.ConclusionThe study describes the use of insecticides and herbicides on crops and highlights the importance of considering agriculture practices when attempting to manage resistance in malaria vectors. Inter-sectoral collaboration between agriculture and public health is required to develop efficient integrated pest and vector management interventions.

【 授权许可】

CC BY   
© The Author(s) 2016