Knox, Tessa B., Yen, Nguyen Thi, Nam, Vu Sinh, Gatton, Michelle L., Kay, Brian H., and Ryan, Peter A. (2007) Critical evaluation of quantitative sampling methods for Aedes aegypti (Diptera: Culicidae) immatures in water storage containers in Vietnam. Journal of Medical Entomology, 44 (2). pp. 192-204.

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Abstract

In response to an identified paucity of information on the size and composition of immature Aedes aegypti (L.) (Diptera: Culicidae) populations in large field containers, we assessed net sampling and pumping/sieving methods for estimating and enumerating third (III)/fourth (IV) instar and pupal populations. Sweep net detection thresholds (number above which ≥90% chance of a positive sample) were ≤28 immatures for seven different container types (115-3000 liter jars and tanks) in the laboratory, and mean recovery percentages varied by container type (6.15-41.29 and 7.39Ð33.10% for III/IV instars and pupae, respectively).A pumping method or hand bailing was applied in the field for the collection of III/IV instars and pupae from 406 receptacles, of which 343 had been previously sampled via a five-sweep netting technique. Larvae were 9.30 times more prevalent than pupae, and abundance varied by container type with means of 36-537 III/IV instars and 6-53 pupae per receptacle. Sweep netting for III/IV instars effectively identiÞed 86.2% of Ae. aegypti-positive containers, whereas sampling for pupae detected only 43.1% of positive containers. When conversion factors (inverse of laboratory recovery percentages) were applied to field net sampling data, estimates of container populations were more accurate for III/IV instars than pupae (maximum R2 = 0.610 and 0.328, respectively); however, the relationship between immature abundance and emergent adult populations remains to be defined

Item ID:	84663
Item Type:	Article (Research - C1)
ISSN:	1938-2928
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Copyright Information:	© 2007 Entomological Society of America. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com
Date Deposited:	18 Feb 2025 03:12
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