Abstract
Paederus fuscipes Curtis is a nocturnal insect. The attractiveness of artificial light sources from residential premises eventually causes the risk of severe dermatitis effect, once Paederus is in contact with human skin. The objective of this study is to investigate whether the light and height factors of residential buildings and its' association to rice cultivation phases are primary reasons for P. fuscipes's mass dispersal into human residential areas. The study site was located in residential premises that were built adjacent to rice field areas (≈ 32-60 m and 164 m) north of the rice field located in Teluk Air Tawar, mainland of Pulau Pinang. Overall, both light sources and rice cultivation phases caused a significant effect for P. fuscipes beetles dispersal flight to invade human settlements. More P. fuscipes were captured near the bright light source with the highest number of beetles found during harvesting stage. Whereas, significantly higher number of P. fuscipes were captured at level 2 and 3 compared to ground and level 1 of the apartment building and P. fuscipes was also found significantly affected by the rice cultivation phases at different elevation levels. This indicates that bright light sources and higher elevation levels are the main factors in attracting P. fuscipes beetles to disperse and causes infestations in residential areas. This finding could create awareness among the public on P. fuscipes dispersal pattern.
Highlights
Rove beetle from the family Staphylinidae is a large family of insects found all over the world with over 47,744 described species in 3,847 genera and 31 subfamilies (Herman 2001)
The objective of this study is to investigate whether the light and height factors of residential buildings and its’ association to rice cultivation phases are primary reasons for P. fuscipes’s mass dispersal into human residential areas
The study site was located in residential premises that were built adjacent to rice field areas (≈ 32–60 m and 164 m) north of the rice field located in Teluk Air Tawar, mainland of Pulau Pinang
Summary
Rove beetle from the family Staphylinidae is a large family of insects found all over the world with over 47,744 described species in 3,847 genera and 31 subfamilies (Herman 2001). The prevalent species of Paederus in Malaysia is Paederus fuscipes and it is locally known as “Charlie” which is normally found in the rice field area (Manley 1977). Large numbers of P. fuscipes infestation has remarkably caused serious public health threat as they swarm during certain rice seasons and caused considerable Paederus dermatitis (PD) outbreaks, a skin blistering condition. By doing further research on the ecology, biology and behaviour of these rove beetles we could prevent or reduce serious health threat such as the erythematous skin lesion and avoid from being a victim of PD in the future
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