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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Be quick or be dead: high temperatures reduce Aedes aegypti (Diptera: Culicidae) larval development time and pyriproxyfen larvicide efficiency in laboratory conditions

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Author(s):
Moura, Lidia [1] ; de Nadai, Barbara L. [1] ; Bernegossi, Aline C. [1] ; Felipe, Mayara C. [1] ; Castro, Gleyson B. [1] ; Corbi, Juliano J. [1]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Hydraul & Sanitat, Aquat Ecol Lab, Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF TROPICAL INSECT SCIENCE; v. 41, n. 2 JAN 2021.
Web of Science Citations: 0
Abstract

Several studies have assessed the efficiency of insect growth regulators to control Aedes aegypti under laboratory conditions. However, empirical evidence evaluating how insect growth regulators respond to different temperatures is scarce. In this paper, we evaluate whether temperature may influence the efficiency of pyriproxyfen. To do so, we analyzed the effect of three temperatures (20, 25 and 30 degrees C) combined with five pyriproxyfen concentrations (0.0001, 0.001, 0.01, 0.1 and 1 mg L-1) on Ae. aegypti larval control. Each experiment had five replicates containing 250 mL of the test solution and 20 larvae according to WHO protocol. Tests were conducted until all mosquitoes had either fully emerged from the control beakers or died. The outcomes showed that, as we increased the temperature, not only did the larval developmental time decrease (from 23.5 to 10.7 days) but also the concentration of larvicide required for 50% (EC50 of 0.0002 and 0.0050 mg L-1 for 20 and 30 degrees C, respectively) and 95% efficiency increased (EC50 of 0.009 and 0.013 mg L-1 for 20 and 30 degrees C, respectively). We highlight how temperature changes produce different results from larvicide applications (p < 0.05) and provide data that allow scientists and the government to evaluate field populations' responses and integrate the use of larvicides more appropriately. We suggest that the effects of environmental factors on larvicide applications should be tested for field mosquito populations so that different temperature conditions can be integrated with the surveillance programs of Aedes aegypti. (AU)

FAPESP's process: 16/04986-6 - Intelligent traps and sensors: an innovative approach to control insect pests and disease vectors
Grantee:Gustavo Enrique de Almeida Prado Alves Batista
Support Opportunities: Research Grants - eScience and Data Science Program - Regular Program Grants
FAPESP's process: 18/21901-0 - Environmental impact assessment of vinasse biodigested in anaerobic bioreactor using ecotoxicology assays
Grantee:Mayara Caroline Felipe
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 16/24622-9 - Study of mosquito Aedes aegypti frequency wings beat using intelligent sensors: simulation of different environmental conditions in laboratory
Grantee:Barbara Lepretti de Nadai
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 16/21946-8 - Study of metal complexation by amino acids imobilized in bacterial cellulose membranes in streams contaminated by sugar cane cultivation: effects on the larvae of Chironomus sancticaroli
Grantee:Juliano José Corbi
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants