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ARPN Journal of Science and Technology >> Volume 7, Issue 1, January 2017

ARPN Journal of Science and Technology


Activity of Coal Fly Ash on Nilaparvata lugens:Disruption of Spiracle Function

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Author Hafiz Fauzana, F.X. Wagiman, Edhi Martono
ISSN 2225-7217
On Pages 209-216
Volume No. 4
Issue No. 3
Issue Date April 01, 2014
Publishing Date April 01, 2014
Keywords coal fly ash, activity, brown planthopper, spiracles and respiratory function.



Abstract

Coal fly ash is potential as an insecticide to control brown planthopper (BPH), Nilaparvata lugens (Stal) through the disruption of spiracle function. This activity is related to the size of both coal fly ash particle and BPH spiracle. We conducted a laboratory study to determine the activity of the coal fly ash in disrupting BPHs spiracle function. The research was conducted to determine the activity of the coal fly ash in disrupting function of BPH spiracles. BPH body was treated with coal fly ash, and its spiracles were then photographed using Scanning Electron Microscope (SEM). We found that coal fly ash particle was resembling spheres of various sizes, ranging from 0.81 to 59.6. Most of these particles were <10 (71.97%) and 10-20 (20.68%) in diameter, while the remaining 7.35% were between with >20-60. The BPH spiracles were elliptical in shape and also vary in size, with the length and width ranging from 6.99 to 178.0 and 5.72 to 63.76 respectively. A significant amount of coal fly ash particles were able to BPH spiracles. Image analysis showed that all spiracles were covered by coal fly ash. Thoracic spiracles were sealed between 40-100%, while 95-100% of the abdominal spiracles were also closed. The covering of spiracles by coal fly ash interfered with the respiratory function of BPH and caused 71% mortality within 72 hours after treatment.


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