TY - JOUR
T1 - LETHAL AND SUBLETHAL CONCENTRATIONS OF FORMULATED LARVICIDES AGAINST SUSCEPTIBLE AEDES AEGYPTI
AU - Aldridge, Robert L.
AU - Alto, Barry W.
AU - Connelly, C. Roxanne
AU - Okech, Bernard
AU - Siegfried, Blair
AU - Linthicum, Kenneth J.
N1 - Funding Information:
For maintenance of the colony of mosquitoes, we thank H. Brown, J. Mollet, and T. Carney at the United States Department of Agriculture—Agricultural Research Service—Center for Medical, Agricultural, and Veterinary Entomology (USDA-ARS-CMAVE) insectaries. This research was supported by the USDA-ARS and the US Department of Defense (DoD) Deployed War-Fighter Protection Program (DWFP). Mention of trade names or commercial products in this publication is solely for the purpose of providing specific information and does not imply recommendation or endorsement by USDA, DoD, the Florida Army National Guard, the University of Florida, or the DWFP. The USDA is an equal opportunity provider and employer. The findings and conclusions in this report are those of the author(s) and do not necessarily represent the views of the Centers for Disease Control and Prevention, the USDA, or the Uniformed Services University.
Publisher Copyright:
Copyright © 2022 by The American Mosquito Control Association, Inc.
PY - 2022/12
Y1 - 2022/12
N2 - Chemical control of vectors depends on the effective application of formulated insecticides. In this study we evaluated formulated larvicides using a larval bioassay against susceptible Aedes aegypti. The estimated larvicide lethal concentrations for 50% mortality (LC50s) were 25.7 μg/liter (Natular 2EC), 3.13 μg/liter (Abate 4E), 0.43 μg/liter (Altosid), 0.03 μg/liter (Nyguard), and 500.6 ITU/liter (VectoBac12AS containing Bacillus thuringiensis israelensis). Sublethal effects were identified and documented from adults that survived exposure to these estimated LC50s (body size and sex proportion). We observed changes in net growth as measured by adult wing lengths. For those larvae exposed to estimated LC50s, the average size of adults was between 0.1% and 10.6% smaller for males and between 1.1% and 13.6% smaller for females compared to controls. Sex proportions varied between larvicides, but some were significantly different from the control, favoring greater survival of females than males.
AB - Chemical control of vectors depends on the effective application of formulated insecticides. In this study we evaluated formulated larvicides using a larval bioassay against susceptible Aedes aegypti. The estimated larvicide lethal concentrations for 50% mortality (LC50s) were 25.7 μg/liter (Natular 2EC), 3.13 μg/liter (Abate 4E), 0.43 μg/liter (Altosid), 0.03 μg/liter (Nyguard), and 500.6 ITU/liter (VectoBac12AS containing Bacillus thuringiensis israelensis). Sublethal effects were identified and documented from adults that survived exposure to these estimated LC50s (body size and sex proportion). We observed changes in net growth as measured by adult wing lengths. For those larvae exposed to estimated LC50s, the average size of adults was between 0.1% and 10.6% smaller for males and between 1.1% and 13.6% smaller for females compared to controls. Sex proportions varied between larvicides, but some were significantly different from the control, favoring greater survival of females than males.
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U2 - 10.2987/22-7084
DO - 10.2987/22-7084
M3 - Article
C2 - 36318783
AN - SCOPUS:85144587318
SN - 8756-971X
VL - 38
SP - 250
EP - 260
JO - Journal of the American Mosquito Control Association
JF - Journal of the American Mosquito Control Association
IS - 4
ER -
