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KMID : 0613820190290020202
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Journal of Life Science
2019 Volume.29 No. 2 p.202 ~ p.208
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Biological Response of Resistant Genes to Korean Brown Planthopper, Nilaparvata lugens Stal
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Choi Nak-Jung
Kim Gwang-Ho
Baik Chai-Hun
Lee Bong-Choon
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Abstract
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Brown planthopper (BPH), Nilaparvata lugens Stal (Hemiptera: Delphacidae), is one of the most important migratory pests damaging rice in Korea. It invades annually from tropical and subtropical areas via continental air streams. It is necessary to determine the resistance levels of rice varieties in order to control efficiency. The honeydew excretion, development, and reproduction of the migratory BPH were studied by region in a laboratory at 25±2℃ and 65±5% RH and a 16L: 8D photoperiodism conducted on three BPH resistant genes: Bph1, Bph2, and Bph18. The information obtained was reported using the jackknife method, and we created life table statistics accordingly. The feeding amount of Bph1 resistant gene was lower than that of resistant genes. The developmental periods of immature stages ranged from 13.7±0.10 d on Bph2 (Namhae, 2015) to 18.5±1.06 d on Bph2 (Sacheon, 2016). Reproductive period and female longevity were longest on the non-resistant genes, Bph2 and Bph18 (except 1980s), and the highest fecundity of N. lugens was observed on the two BPH resistant genes. Highest net reproductive rates (R0) were calculated on Bph2 by region. Intrinsic rates of population increase (rm) showed a difference in resistant genes by region. These population parameters showed that migratory regions and biological characteristics of N. lugens vary annually.
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KEYWORD
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Brown planthopper, development, life table, reproduction, resistant genes
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