Effect of ornamental plants on biology of Aedes albopictus
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Abstract
Aedes albopictus is a potential vector of several infectious diseases in humans such as dengue hemorrhagic fever, yellow fever, chikungunya and encephalitis. The objective of this research was to study the effect of biotic factor such as host plant species on biology and survival of Ae. albopictus populations in laboratory conditions. Ormental plants were classified into two groups: 7 structural plants including Aloe vera, Dracaena trifasciata, Aechmea fasciata, Aerides spp., Tradescantia pallida, Ficus annulate, and Drimiopsis maculate; 4 aquatic plants including Cyperus involucratus, Nymphaea sp., Scindapsus aureus, and Dracaena sanderiana. Testing for oviposition rates and survival rates of Ae. albopictus fed on household ornamental plants, Ae. albopictus showed the highest oviposition rate and hatching rate in bromeliad (structural plant) with 69.6 eggs and 63.2 %, respectively and lotus (aquatic plant) with 82.2 eggs and 76.8 %, respectively. Survival rates of Ae. albopictus fed on household ornamental plants, male and female Ae. albopictus showed the highest survival rate in aloe vera (structural plant) with 4.4 and 5.8 days, respectively and lucky bamboo (aquatic plant) with 15.4 and 21.4 days, respectively. Then lucky bamboo and aloe vera were selected to study the life table of Ae. albopictus growing in both plants. Results showed that net reproductive rates (R0) and intrinsic rate of increase (rm) of Ae. albopictus growing in lucky bamboo (aquatic plant) were 50.8 and 0.3, respectively and in aloe vera (structural plant) were 40.7 and 0.29, respectively. When compared to the result of previous study, it was found that Ae. albopictus growing in lucky bamboo and aloe vera can increase the potential of increasing the Ae. albopictus population. This study revealed that biological factor such as host plant species affect the survival of Ae. albopictus. Consequently, if we can control this biological factor, it can also help control the existence
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