Predatory efficiency of the water bug Sphaerodema annulatum on mosquito larvae ( Culex quinquefasciatus) and its effect on the adult emergence

The daily number of IV instar larva of Culex quinquefasciatus killed, rate of pupation and adult emergence was noted in presence of the predatory water bug Sphaerodema annulatum for a period of seven consecutive days, experimentally, in the laboratory. The rate of IV instar larva killed by the water...

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Bibliographic Details
Published in:Bioresource technology 2004-11, Vol.95 (2), p.169-172
Main Authors: Aditya, G, Bhattacharyya, S, Kundu, N, Saha, G.K, Raut, S.K
Format: Article
Language:English
Subjects:
Adult emergence
adult insects
Animals
aquatic insects
Belostomatidae
Biological and medical sciences
Culex - physiology
Culex quinquefasciatus
eclosion
Ecosystem
Fresh Water
Freshwater
Fundamental and applied biological sciences. Psychology
Heteroptera - physiology
India
insect control
insect pests
Larva - physiology
larvae
Larval predation
Mosquito Control - methods
Population Dynamics
predation
predator-prey relationships
Predatory Behavior - physiology
predatory insects
Reproduction - physiology
Sphaerodema annulatum
Water bug
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Summary:The daily number of IV instar larva of Culex quinquefasciatus killed, rate of pupation and adult emergence was noted in presence of the predatory water bug Sphaerodema annulatum for a period of seven consecutive days, experimentally, in the laboratory. The rate of IV instar larva killed by the water bugs on an average was 65.17 per day. The rate of pupation ranged between 7.6 and 48 in control while in presence of water bugs it ranged between 6 and 35. The rate of adult emergence in control experiments varied between 1.4 and 4.8 per day, which was reduced to only 0.4–28.8 per day in case of the water bugs. The results clearly indicate that the water bugs on its way of predation reduces the rate of pupation and adult emergence of Cx. quinquefasciatus significantly which calls for an extensive field trials.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2004.02.007